CVE-2026-72458

0.0

apparmor: fix NULL pointer dereference in unpack_pdb

Overview
Vulnerability Timeline

Overview

Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: fix NULL pointer dereference in unpack_pdb pdb->dfa could be NULL if unpack_dfa fails, causing a NULL pointer dereference.

Details

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

Impact

Affected Products

The following products are affected by CVE-2026-72458 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

Solution

Apply the Linux kernel patch for AppArmor to fix a NULL pointer dereference.

Update the Linux kernel to the patched version.
Recompile and install the kernel.
Reboot the system to load the new kernel.

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-2026-72458.

URL	Resource
https://git.kernel.org/stable/c/73d86ca950b80cd39ca948e2c518d135bf2308c8
https://git.kernel.org/stable/c/7681ca43d2b1c776e62fe77e3167835fb1ab8319
https://git.kernel.org/stable/c/fbfdb5a94a48797bea232791e24c38f3aa3063c8

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-72458 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-2026-72458 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-2026-72458 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-2026-72458 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
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': 'fbfdb5a94a48797bea232791e24c38f3aa3063c8', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '73d86ca950b80cd39ca948e2c518d135bf2308c8', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '7681ca43d2b1c776e62fe77e3167835fb1ab8319', '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': 'fbfdb5a94a48797bea232791e24c38f3aa3063c8', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '73d86ca950b80cd39ca948e2c518d135bf2308c8', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '7681ca43d2b1c776e62fe77e3167835fb1ab8319', '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	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': 'fbfdb5a94a48797bea232791e24c38f3aa3063c8', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '73d86ca950b80cd39ca948e2c518d135bf2308c8', 'versionType': 'git'}, {'status': 'affected', 'version': '2e12c5f060176ede209673e4f63ea5d0e3c5814c', 'lessThan': '7681ca43d2b1c776e62fe77e3167835fb1ab8319', '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: fix NULL pointer dereference in unpack_pdb pdb->dfa could be NULL if unpack_dfa fails, causing a NULL pointer dereference.
Added	Reference	https://git.kernel.org/stable/c/73d86ca950b80cd39ca948e2c518d135bf2308c8
Added	Reference	https://git.kernel.org/stable/c/7681ca43d2b1c776e62fe77e3167835fb1ab8319
Added	Reference	https://git.kernel.org/stable/c/fbfdb5a94a48797bea232791e24c38f3aa3063c8

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.

Memory Corruption

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