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9.8
CRITICAL CVSS 3.1
CVE-2026-53151
rxrpc: Fix the ACK parser to extract the SACK table for parsing
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix the ACK parser to extract the SACK table for parsing Fix modification of the received skbuff in rxrpc_input_soft_acks() and a potential incorrect access of the buffer in a fragmented UDP packet (the packet would probably have to be deliberately pre-generated as fragmented) when AF_RXRPC tries to extract the contents of the SACK table by copying out the contents of the SACK table into a buffer before attempting to parse AF_RXRPC assumes that it can just call skb_condense() and then validly access the SACK table from skb->data and that it will be a flat buffer - but skb_condense() can silently fail to do anything under some circumstances. Note that whilst rxrpc_input_soft_acks() should be able to parse extended ACKs, the rest of AF_RXRPC doesn't currently support that. Further, there's then no need to call skb_condense() in rxrpc_input_ack(), so don't.

Details
INFO

Published Date :

June 25, 2026, 9:16 a.m.

Last Modified :

July 6, 2026, 5:43 p.m.

Remotely Exploit :

Yes !

Source :

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

The following products are affected by CVE-2026-53151 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 CRITICAL 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Address memory corruption by updating the Linux kernel.
  • Update the Linux kernel to the latest version.
  • Review skbuff handling in rxrpc_input_soft_acks().
  • Ensure skb_condense() failures are handled properly.
  • Avoid calling skb_condense() in rxrpc_input_ack().
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-2026-53151.

URL Resource
https://git.kernel.org/stable/c/224298450be5c04d2a6ea1c2a94669d7ebf65d00 Patch
https://git.kernel.org/stable/c/333b6d5bb9f87827ac2639c737bf9613dbae7253 Patch
https://git.kernel.org/stable/c/566c4c1244de50fbff1f89ff93c9d7b0fc256db4 Patch
https://git.kernel.org/stable/c/5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1 Patch
https://git.kernel.org/stable/c/775c5e89272a2615b72bb84f611ba66fa3b7493e Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-53151 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-2026-53151 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-2026-53151 vulnerability anywhere in the article.

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-2026-53151 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]

    Jul. 06, 2026

    Action Type Old Value New Value
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.144 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.95
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/224298450be5c04d2a6ea1c2a94669d7ebf65d00 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/333b6d5bb9f87827ac2639c737bf9613dbae7253 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/566c4c1244de50fbff1f89ff93c9d7b0fc256db4 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/775c5e89272a2615b72bb84f611ba66fa3b7493e Types: Patch
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 04, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1
    Added Reference https://git.kernel.org/stable/c/775c5e89272a2615b72bb84f611ba66fa3b7493e
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '566c4c1244de50fbff1f89ff93c9d7b0fc256db4', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '224298450be5c04d2a6ea1c2a94669d7ebf65d00', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '333b6d5bb9f87827ac2639c737bf9613dbae7253', 'versionType': 'git'}], 'programFiles': ['net/rxrpc/input.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/rxrpc/input.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '5d1ae4e17a3ecd8561cdb4f4f70152f41039c4e1', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '775c5e89272a2615b72bb84f611ba66fa3b7493e', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '566c4c1244de50fbff1f89ff93c9d7b0fc256db4', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '224298450be5c04d2a6ea1c2a94669d7ebf65d00', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '333b6d5bb9f87827ac2639c737bf9613dbae7253', 'versionType': 'git'}], 'programFiles': ['net/rxrpc/input.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.144', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.95', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/rxrpc/input.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jun. 28, 2026

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

    Jun. 25, 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': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '566c4c1244de50fbff1f89ff93c9d7b0fc256db4', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '224298450be5c04d2a6ea1c2a94669d7ebf65d00', 'versionType': 'git'}, {'status': 'affected', 'version': 'd57a3a151660902091491ac2633134e1be92557f', 'lessThan': '333b6d5bb9f87827ac2639c737bf9613dbae7253', 'versionType': 'git'}], 'programFiles': ['net/rxrpc/input.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/rxrpc/input.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix the ACK parser to extract the SACK table for parsing Fix modification of the received skbuff in rxrpc_input_soft_acks() and a potential incorrect access of the buffer in a fragmented UDP packet (the packet would probably have to be deliberately pre-generated as fragmented) when AF_RXRPC tries to extract the contents of the SACK table by copying out the contents of the SACK table into a buffer before attempting to parse AF_RXRPC assumes that it can just call skb_condense() and then validly access the SACK table from skb->data and that it will be a flat buffer - but skb_condense() can silently fail to do anything under some circumstances. Note that whilst rxrpc_input_soft_acks() should be able to parse extended ACKs, the rest of AF_RXRPC doesn't currently support that. Further, there's then no need to call skb_condense() in rxrpc_input_ack(), so don't.
    Added Reference https://git.kernel.org/stable/c/224298450be5c04d2a6ea1c2a94669d7ebf65d00
    Added Reference https://git.kernel.org/stable/c/333b6d5bb9f87827ac2639c737bf9613dbae7253
    Added Reference https://git.kernel.org/stable/c/566c4c1244de50fbff1f89ff93c9d7b0fc256db4
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: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact