CVE-2026-74566
keys: make keyring key-chunk byte order agree with keyring_diff_objects()
Description
In the Linux kernel, the following vulnerability has been resolved: keys: make keyring key-chunk byte order agree with keyring_diff_objects() keyring_get_key_chunk() loads description bytes into the index chunk low address first, while keyring_diff_objects() numbers the first differing bit from the low end and folds the absolute byte index into the level without removing the inline-prefix offset the level already carries. The two disagree on byte order and bit position, so the array can be told two keys first differ at a bit that does not differ in the chunk the walker uses, letting crafted descriptions collide into one node. Load the chunk in the order keyring_diff_objects() assumes and drop the inline-prefix length when folding the byte index into the level. This only changes the in-memory ordering used to place keys within a keyring; add, search and read of non-colliding keys are unaffected.
INFO
Published Date :
Aug. 15, 2026, 1:18 p.m.
Last Modified :
Aug. 15, 2026, 1:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74566
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.
No affected product recoded yet
Solution
- Update the Linux kernel to the resolved version.
- Ensure key-chunk byte order matches keyring_diff_objects().
- Remove inline-prefix offset when folding byte index.
- Test for non-colliding key operations.
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-2026-74566.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74566 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-2026-74566
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-2026-74566 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74566 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.
-
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': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': 'bd0f976ef89dce6db458bf75bc2cf51127becc41', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': '7269df3e7fcfa308e6a456305162f7788747bdbd', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': '3d9f16c0b643ceac305526b2e2fe25c2c6166926', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': '7e5397a3fed0dee7779bd084bec3c0584db3c930', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': '58565eef0f8d861aae92abfb7658458d661cee17', 'versionType': 'git'}], 'programFiles': ['security/keys/keyring.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['security/keys/keyring.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: keys: make keyring key-chunk byte order agree with keyring_diff_objects() keyring_get_key_chunk() loads description bytes into the index chunk low address first, while keyring_diff_objects() numbers the first differing bit from the low end and folds the absolute byte index into the level without removing the inline-prefix offset the level already carries. The two disagree on byte order and bit position, so the array can be told two keys first differ at a bit that does not differ in the chunk the walker uses, letting crafted descriptions collide into one node. Load the chunk in the order keyring_diff_objects() assumes and drop the inline-prefix length when folding the byte index into the level. This only changes the in-memory ordering used to place keys within a keyring; add, search and read of non-colliding keys are unaffected. Added Reference https://git.kernel.org/stable/c/3d9f16c0b643ceac305526b2e2fe25c2c6166926 Added Reference https://git.kernel.org/stable/c/58565eef0f8d861aae92abfb7658458d661cee17 Added Reference https://git.kernel.org/stable/c/7269df3e7fcfa308e6a456305162f7788747bdbd Added Reference https://git.kernel.org/stable/c/7e5397a3fed0dee7779bd084bec3c0584db3c930 Added Reference https://git.kernel.org/stable/c/bd0f976ef89dce6db458bf75bc2cf51127becc41