CVE-2026-72195
fs/ntfs3: bound attr_off in UpdateResidentValue against data_off
Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound attr_off in UpdateResidentValue against data_off In do_action()'s UpdateResidentValue case (fslog.c:3307), lrh->attr_off and lrh->redo_len come from the on-disk LRH. When they satisfy aoff + dlen < attr->res.data_off, the assignment attr->res.data_size = cpu_to_le32(aoff + dlen - data_off); underflows to ~4 GiB (e.g. 0xFFFFFFF9 when aoff=0x10, dlen=1, data_off=0x18). Subsequent code that reads attr->res.data_size to walk the resident attribute payload would then read up to 4 GiB past the 1024-byte MFT record allocation. The existing mi_enum_attr() defense in fs/ntfs3/record.c:287 catches the corrupted data_size on the next attribute walk and fails the mount, but only on the path that walks all attributes. A read site that picks an attribute by name and reads its data_size without re-validating is not covered. Validate aoff against data_off and asize at the source. Reproduced under UML+KASAN on mainline 8d90b09e6741 via pr_warn-only probe: with aoff=0x10 and data_off=0x18, the post-assignment data_size is 0xfffffff9 (mount then fails at -22 from mi_enum_attr). [[email protected]: clang-formatted the changes]
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the patched version.
- Validate attribute offset against data offset and size.
- Ensure correct data size calculation.
- Review code accessing resident attribute payload.
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-2026-72195.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72195 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-2026-72195
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-2026-72195 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72195 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.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 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 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'ab8761676d638c5be170aaf91b7ffdd451236616', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '53c12f178f584dc5f836ffe2782138a6e9348ed9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '546518468e6c9ea469669eef78f8cc380ad6e2ca', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '97758fd9756b5f09e9ddc6a5f6a569041acc8421', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '50b5e83384e7fed3d11d18b79ff350e9d6d89861', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'a89c66674283a0293c0f266dc57087a6114371a3', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'd1570c48f49a693974d000251030370ee2e83539', 'versionType': 'git'}], 'programFiles': ['fs/ntfs3/fslog.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', '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': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs3/fslog.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'ab8761676d638c5be170aaf91b7ffdd451236616', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '53c12f178f584dc5f836ffe2782138a6e9348ed9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '546518468e6c9ea469669eef78f8cc380ad6e2ca', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '97758fd9756b5f09e9ddc6a5f6a569041acc8421', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '50b5e83384e7fed3d11d18b79ff350e9d6d89861', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'a89c66674283a0293c0f266dc57087a6114371a3', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'd1570c48f49a693974d000251030370ee2e83539', 'versionType': 'git'}], 'programFiles': ['fs/ntfs3/fslog.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', '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': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs3/fslog.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 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': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'ab8761676d638c5be170aaf91b7ffdd451236616', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '53c12f178f584dc5f836ffe2782138a6e9348ed9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '546518468e6c9ea469669eef78f8cc380ad6e2ca', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '97758fd9756b5f09e9ddc6a5f6a569041acc8421', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': '50b5e83384e7fed3d11d18b79ff350e9d6d89861', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'a89c66674283a0293c0f266dc57087a6114371a3', 'versionType': 'git'}, {'status': 'affected', 'version': 'b46acd6a6a627d876898e1c84d3f84902264b445', 'lessThan': 'd1570c48f49a693974d000251030370ee2e83539', 'versionType': 'git'}], 'programFiles': ['fs/ntfs3/fslog.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', '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': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ntfs3/fslog.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound attr_off in UpdateResidentValue against data_off In do_action()'s UpdateResidentValue case (fslog.c:3307), lrh->attr_off and lrh->redo_len come from the on-disk LRH. When they satisfy aoff + dlen < attr->res.data_off, the assignment attr->res.data_size = cpu_to_le32(aoff + dlen - data_off); underflows to ~4 GiB (e.g. 0xFFFFFFF9 when aoff=0x10, dlen=1, data_off=0x18). Subsequent code that reads attr->res.data_size to walk the resident attribute payload would then read up to 4 GiB past the 1024-byte MFT record allocation. The existing mi_enum_attr() defense in fs/ntfs3/record.c:287 catches the corrupted data_size on the next attribute walk and fails the mount, but only on the path that walks all attributes. A read site that picks an attribute by name and reads its data_size without re-validating is not covered. Validate aoff against data_off and asize at the source. Reproduced under UML+KASAN on mainline 8d90b09e6741 via pr_warn-only probe: with aoff=0x10 and data_off=0x18, the post-assignment data_size is 0xfffffff9 (mount then fails at -22 from mi_enum_attr). [[email protected]: clang-formatted the changes] Added Reference https://git.kernel.org/stable/c/50b5e83384e7fed3d11d18b79ff350e9d6d89861 Added Reference https://git.kernel.org/stable/c/53c12f178f584dc5f836ffe2782138a6e9348ed9 Added Reference https://git.kernel.org/stable/c/546518468e6c9ea469669eef78f8cc380ad6e2ca Added Reference https://git.kernel.org/stable/c/97758fd9756b5f09e9ddc6a5f6a569041acc8421 Added Reference https://git.kernel.org/stable/c/a89c66674283a0293c0f266dc57087a6114371a3 Added Reference https://git.kernel.org/stable/c/ab8761676d638c5be170aaf91b7ffdd451236616 Added Reference https://git.kernel.org/stable/c/d1570c48f49a693974d000251030370ee2e83539