CVE-2026-74567
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.
Affected versions
Linux kernel versions
5.3
and later are affected. Fixed in
6.6.151,
6.12.103,
6.18.44,
7.1.8,
7.2-rc6
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-74567?
CVE-2026-74567 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.3 onward and has been patched in 6.6.151, 6.12.103, 6.18.44 and others. CVE-2026-74567 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-74567?
Yes. CVE-2026-74567 has been patched. Fixed versions include 6.6.151, 6.12.103, 6.18.44 and others. If you are running Linux kernel 5.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74567 actively exploited?
No. CVE-2026-74567 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.