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7.8
HIGH CVSS 3.1
CVE-2026-64600
xfs: resample the data fork mapping after cycling ILOCK
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: xfs: resample the data fork mapping after cycling ILOCK xfs_reflink_fill_{cow_hole,delalloc} are both presented with an inode, a data fork mapping, and a cow fork mapping. Unfortunately, these two helpers cycle the ILOCK to grab a transaction, which means that the mappings are stale as soon as we reacquire the ILOCK. Currently we refresh the cow fork mapping by re-calling xfs_find_trim_cow_extent, but we don't refresh the data fork mapping beforehand, which means that the xfs_bmap_trim_cow in that function queries the refcount btree about the wrong physical blocks and returns an inaccurate value in *shared. If *shared is now false, the directio write proceeds with a stale data fork mapping. Fix this by querying the data fork mapping if the sequence counter changes across the ILOCK cycle.

Details
INFO

Published Date :

July 23, 2026, 6:16 a.m.

Last Modified :

Aug. 18, 2026, 12:38 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64600 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Update the Linux kernel to resolve a race condition related to data fork mapping updates.
  • Update the Linux kernel to the latest stable version.
  • Verify that the xfs_reflink_fill helpers are updated.
  • Ensure data fork mapping is refreshed after ILOCK cycle.
  • Query data fork mapping if sequence counter changes.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64600.

URL Resource
https://cdn2.qualys.com/advisory/2026/07/22/RefluXFS.txt Exploit Third Party Advisory
https://git.kernel.org/stable/c/206c09b04dc5469c7ff14d8aceff2d47c88078d9 Patch
https://git.kernel.org/stable/c/2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7 Patch
https://git.kernel.org/stable/c/44f891bc088958399eec27f7604928694aa35581 Patch
https://git.kernel.org/stable/c/50f0012da1040f69a4e788cd9aed587c9a04983f Patch
https://git.kernel.org/stable/c/b8c9aa832b52680ee40d6cab0efb081f9a69df05 Patch
https://git.kernel.org/stable/c/dc11be133efca5fe3a2fb02b016dee825cc12f18 Patch
https://git.kernel.org/stable/c/e705d81a7193dd19e69b8e2bad4696d78a4ea075 Patch
http://www.openwall.com/lists/oss-security/2026/07/22/14 Mailing List Exploit
http://www.openwall.com/lists/oss-security/2026/07/22/18 Mailing List
http://www.openwall.com/lists/oss-security/2026/07/22/19 Mailing List
http://www.openwall.com/lists/oss-security/2026/07/31/3 Mailing List
http://www.openwall.com/lists/oss-security/2026/08/03/4 Mailing List
http://www.openwall.com/lists/oss-security/2026/08/03/8 Mailing List
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64600 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64600 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64600 vulnerability anywhere in the article.

  • security.nl
Nieuw Linux-lek kan lokale aanvaller root maken op systemen met XFS

Onderzoekers waarschuwen voor een nieuwe kwetsbaarheid in de Linux-kernel waardoor een lokale aanvaller root kan worden op systemen met een XFS-bestandssysteem. Miljoenen systemen lopen mogelijk risic ... Read more

Published Date: Jul 23, 2026 (3 weeks, 5 days ago)
  • The Hacker News
Nine-Year-Old RefluXFS Linux Flaw Gives Local Users Root on Default RHEL Installs

RefluXFS, a new Linux kernel flaw disclosed on July 22 and tracked as CVE-2026-64600, lets an unprivileged local user overwrite root-owned files on an XFS filesystem and gain persistent root access. Q ... Read more

Published Date: Jul 23, 2026 (3 weeks, 5 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64600 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Aug. 18, 2026

    Action Type Old Value New Value
    Added CWE CWE-362
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.178 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.145 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.96 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.39 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.2:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.11 up to (excluding) 5.15.212
    Added Reference Type kernel.org: https://cdn2.qualys.com/advisory/2026/07/22/RefluXFS.txt Types: Exploit, Third Party Advisory
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/206c09b04dc5469c7ff14d8aceff2d47c88078d9 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/44f891bc088958399eec27f7604928694aa35581 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/50f0012da1040f69a4e788cd9aed587c9a04983f Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/b8c9aa832b52680ee40d6cab0efb081f9a69df05 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/dc11be133efca5fe3a2fb02b016dee825cc12f18 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/e705d81a7193dd19e69b8e2bad4696d78a4ea075 Types: Patch
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/07/22/14 Types: Exploit, Mailing List
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/07/22/18 Types: Mailing List
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/07/22/19 Types: Mailing List
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/07/31/3 Types: Mailing List
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/08/03/4 Types: Mailing List
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/08/03/8 Types: Mailing List
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'dc11be133efca5fe3a2fb02b016dee825cc12f18', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'b8c9aa832b52680ee40d6cab0efb081f9a69df05', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '50f0012da1040f69a4e788cd9aed587c9a04983f', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'e705d81a7193dd19e69b8e2bad4696d78a4ea075', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '206c09b04dc5469c7ff14d8aceff2d47c88078d9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '44f891bc088958399eec27f7604928694aa35581', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'dc11be133efca5fe3a2fb02b016dee825cc12f18', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'b8c9aa832b52680ee40d6cab0efb081f9a69df05', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '50f0012da1040f69a4e788cd9aed587c9a04983f', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'e705d81a7193dd19e69b8e2bad4696d78a4ea075', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '206c09b04dc5469c7ff14d8aceff2d47c88078d9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '44f891bc088958399eec27f7604928694aa35581', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Aug. 03, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/08/03/8
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Aug. 03, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/08/03/4
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Jul. 31, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/07/31/3
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 27, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 24, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/50f0012da1040f69a4e788cd9aed587c9a04983f
    Added Reference https://git.kernel.org/stable/c/b8c9aa832b52680ee40d6cab0efb081f9a69df05
    Added Reference https://git.kernel.org/stable/c/dc11be133efca5fe3a2fb02b016dee825cc12f18
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'e705d81a7193dd19e69b8e2bad4696d78a4ea075', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '206c09b04dc5469c7ff14d8aceff2d47c88078d9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '44f891bc088958399eec27f7604928694aa35581', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'dc11be133efca5fe3a2fb02b016dee825cc12f18', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'b8c9aa832b52680ee40d6cab0efb081f9a69df05', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '50f0012da1040f69a4e788cd9aed587c9a04983f', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'e705d81a7193dd19e69b8e2bad4696d78a4ea075', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '206c09b04dc5469c7ff14d8aceff2d47c88078d9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '44f891bc088958399eec27f7604928694aa35581', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 24, 2026

    Action Type Old Value New Value
    Added Reference https://cdn2.qualys.com/advisory/2026/07/22/RefluXFS.txt
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Jul. 23, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/07/22/14
    Added Reference http://www.openwall.com/lists/oss-security/2026/07/22/18
    Added Reference http://www.openwall.com/lists/oss-security/2026/07/22/19
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 23, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': 'e705d81a7193dd19e69b8e2bad4696d78a4ea075', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '206c09b04dc5469c7ff14d8aceff2d47c88078d9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '44f891bc088958399eec27f7604928694aa35581', 'versionType': 'git'}, {'status': 'affected', 'version': '3c68d44a2b49a0ac9165faa9c191e1e618c8a8d5', 'lessThan': '2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7', 'versionType': 'git'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.11'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.11', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/xfs_reflink.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: xfs: resample the data fork mapping after cycling ILOCK xfs_reflink_fill_{cow_hole,delalloc} are both presented with an inode, a data fork mapping, and a cow fork mapping. Unfortunately, these two helpers cycle the ILOCK to grab a transaction, which means that the mappings are stale as soon as we reacquire the ILOCK. Currently we refresh the cow fork mapping by re-calling xfs_find_trim_cow_extent, but we don't refresh the data fork mapping beforehand, which means that the xfs_bmap_trim_cow in that function queries the refcount btree about the wrong physical blocks and returns an inaccurate value in *shared. If *shared is now false, the directio write proceeds with a stale data fork mapping. Fix this by querying the data fork mapping if the sequence counter changes across the ILOCK cycle.
    Added Reference https://git.kernel.org/stable/c/206c09b04dc5469c7ff14d8aceff2d47c88078d9
    Added Reference https://git.kernel.org/stable/c/2f4acd0fcd862e22eab45690ec2c08c80b6ef2e7
    Added Reference https://git.kernel.org/stable/c/44f891bc088958399eec27f7604928694aa35581
    Added Reference https://git.kernel.org/stable/c/e705d81a7193dd19e69b8e2bad4696d78a4ea075
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact