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ReviewHigh

CVE-2026-74567

Linux

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 rea...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.15
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

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 rea...

Affected product and versions

Product
Linux
Affected versions
>= f771fde82051976a6fc0fd570f8b86de4a92124b < 4c0c26f751e50d3027eacc4d7d0fabc31f1d7e6b, >= f771fde82051976a6fc0fd570f8b86de4a92124b < 79916f40d4ab1b4ae694d8c024fd179454bfe46e, >= f771fde82051976a6fc0fd570f8b86de4a92124b < e5b01998cef8d7f613200230ccaadebe5de9135c, >= f771fde82051976a6fc0fd570f8b86de4a92124b < d1933e03e8c74a018550c31a393b79c4d95bff40, >= f771fde82051976a6fc0fd570f8b86de4a92124b < 3a744838453fb9309ce5a5526d3252e211d60152, >= f771fde82051976a6fc0fd570f8b86de4a92124b < e9417d21a22ad2ec398e78fcf084b717ce92cf2f, >= f771fde82051976a6fc0fd570f8b86de4a92124b < 8dba33c1e779d0fb9a2acb31e354cf0fc0229111, >= f771fde82051976a6fc0fd570f8b86de4a92124b < 63918731f9ae25b5deb022f118e941e6dddfcef4, >= 5.3
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
Not available