CVE-2026-74671: ima: fix out-of-bounds read in xattr_verify()

lowCVSS 3.4CVE-2026-74671

CSIRTS triage

vendor: Linux product: Linux kernel Information disclosure

What: An out-of-bounds read in the IMA (Integrity Measurement Architecture) xattr_verify function can leak kernel memory.
Who is affected: Systems running affected Linux kernel versions with IMA extended attribute verification enabled.
Urgency: Low priority; CVSS 3.4 and not exploited but can leak small amounts of kernel memory through crafted extended attributes.
Action: Apply Linux kernel patch fixing array bounds checking in IMA xattr_verify function.

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 3.4
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74671

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-2026-746710.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74671	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-74671: In the Linux kernel, the following vulnerability has been resolved: ima: fix out-of-bounds rea…nvd

Recent advisories for ima

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-74671: In the Linux kernel, the following vulnerability has been resolved: ima: fix out-of-bounds rea…nvd · 2026-08-22
highCVE-2026-74592: In the Linux kernel, the following vulnerability has been resolved: ima: Instantiate file_trun…nvd · 2026-08-22
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mediumCVE-2026-74592: ima: Instantiate file_truncate and path_truncate hooksmsrc · 2026-08-11
highCVE-2026-43733: The issue was addressed with improved memory handling. This issue is fixed in iOS 26.6 and iPa…nvd · 2026-07-27
mediumCVE-2026-64644: Next.js is a React framework for building full-stack web applications. In versions 15.5.0 thro…nvd · 2026-07-27