CVE-2026-74567
keys: fix out-of-bounds read in keyring_get_key_chunk()
Description
In the Linux kernel, the following vulnerability has been resolved: keys: fix out-of-bounds read in keyring_get_key_chunk() For description-level chunks keyring_get_key_chunk() advances the read pointer by level * sizeof(long) past the inline prefix but only bounds-checks the prefix, so a long enough key description is read past its kmemdup(desc, desc_len + 1) allocation. Compute the full byte offset and bounds-check the description against it before reading. The walk only reaches a description-level chunk when two keys collide through the hash, x, type and domain_tag chunks, so this is reached from an unprivileged add_key(2) with a crafted pair of same-type keys whose index hashes collide; KASAN reports a slab-out-of-bounds read.
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-2026-74567
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
- Apply the patch for the keys module.
- Update the Linux kernel.
- Compute full byte offset for description.
- Bounds-check description before reading.
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-2026-74567.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74567 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-2026-74567
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-2026-74567 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74567 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': 'd1933e03e8c74a018550c31a393b79c4d95bff40', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': '3a744838453fb9309ce5a5526d3252e211d60152', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': 'e9417d21a22ad2ec398e78fcf084b717ce92cf2f', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': '8dba33c1e779d0fb9a2acb31e354cf0fc0229111', 'versionType': 'git'}, {'status': 'affected', 'version': 'f771fde82051976a6fc0fd570f8b86de4a92124b', 'lessThan': '63918731f9ae25b5deb022f118e941e6dddfcef4', '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: fix out-of-bounds read in keyring_get_key_chunk() For description-level chunks keyring_get_key_chunk() advances the read pointer by level * sizeof(long) past the inline prefix but only bounds-checks the prefix, so a long enough key description is read past its kmemdup(desc, desc_len + 1) allocation. Compute the full byte offset and bounds-check the description against it before reading. The walk only reaches a description-level chunk when two keys collide through the hash, x, type and domain_tag chunks, so this is reached from an unprivileged add_key(2) with a crafted pair of same-type keys whose index hashes collide; KASAN reports a slab-out-of-bounds read. Added Reference https://git.kernel.org/stable/c/3a744838453fb9309ce5a5526d3252e211d60152 Added Reference https://git.kernel.org/stable/c/63918731f9ae25b5deb022f118e941e6dddfcef4 Added Reference https://git.kernel.org/stable/c/8dba33c1e779d0fb9a2acb31e354cf0fc0229111 Added Reference https://git.kernel.org/stable/c/d1933e03e8c74a018550c31a393b79c4d95bff40 Added Reference https://git.kernel.org/stable/c/e9417d21a22ad2ec398e78fcf084b717ce92cf2f