CVE-2026-72457
apparmor: fail policy unpack on accept2 allocation failure
Description
In the Linux kernel, the following vulnerability has been resolved: apparmor: fail policy unpack on accept2 allocation failure unpack_pdb() may need to allocate a missing ACCEPT2 table for older policy data. If that allocation failed, it set an error message but jumped to the success path, returning a policydb with the required table missing. Return -ENOMEM through the normal failure path when the ACCEPT2 allocation fails. Remove the now-unused out label.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:19 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the latest version.
- Verify AppArmor policy unpacking functions correctly.
- Re-apply security policies.
- Restart affected services.
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-2026-72457.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72457 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-2026-72457
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-2026-72457 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72457 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.
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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': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '22dc9433d458cff1270f120685114a9753e0ad1b', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '106e909e12baf059538f0b0f1a59f87781d25b3c', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '45cf568241048e560a81aa2053f06a62069f5640', 'versionType': 'git'}], 'programFiles': ['security/apparmor/policy_unpack.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'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': ['security/apparmor/policy_unpack.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '22dc9433d458cff1270f120685114a9753e0ad1b', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '106e909e12baf059538f0b0f1a59f87781d25b3c', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '45cf568241048e560a81aa2053f06a62069f5640', 'versionType': 'git'}], 'programFiles': ['security/apparmor/policy_unpack.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'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': ['security/apparmor/policy_unpack.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': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '22dc9433d458cff1270f120685114a9753e0ad1b', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '106e909e12baf059538f0b0f1a59f87781d25b3c', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '45cf568241048e560a81aa2053f06a62069f5640', 'versionType': 'git'}], 'programFiles': ['security/apparmor/policy_unpack.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.17', 'versionType': 'semver'}, {'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': ['security/apparmor/policy_unpack.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: apparmor: fail policy unpack on accept2 allocation failure unpack_pdb() may need to allocate a missing ACCEPT2 table for older policy data. If that allocation failed, it set an error message but jumped to the success path, returning a policydb with the required table missing. Return -ENOMEM through the normal failure path when the ACCEPT2 allocation fails. Remove the now-unused out label. Added Reference https://git.kernel.org/stable/c/106e909e12baf059538f0b0f1a59f87781d25b3c Added Reference https://git.kernel.org/stable/c/22dc9433d458cff1270f120685114a9753e0ad1b Added Reference https://git.kernel.org/stable/c/45cf568241048e560a81aa2053f06a62069f5640