CVE-2026-74567: keys: fix out-of-bounds read in keyring_get_key_chunk()

lowCVSS 2.5CVE-2026-74567

CSIRTS triage

vendor: Linux product: Linux Kernel Information disclosure

What: The keyring_get_key_chunk function reads beyond allocated bounds, leaking kernel memory.
Who is affected: Systems using kernel keyring functionality running affected Linux kernel versions.
Urgency: Low priority; information disclosure risk but requires local access to keyring operations.
Action: Apply kernel patches to add bounds checking in keyring_get_key_chunk().

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: low — CVSS 2.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74567

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-745670.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74567	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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highCVE-2026-74567: In the Linux kernel, the following vulnerability has been resolved: keys: fix out-of-bounds re…nvd

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