CVE-2026-74592: ima: Instantiate file_truncate and path_truncate hooks

mediumCVSS 5.5CVE-2026-74592

CSIRTS triage

vendor: Linux product: Linux KernelOther

What: IMA (Integrity Measurement Architecture) is missing hook instantiation for file_truncate and path_truncate operations, weakening file integrity monitoring.
Who is affected: Systems with IMA enabled that rely on complete file operation coverage.
Urgency: Medium priority; integrity monitoring may be incomplete, but no direct exploitation vector documented.
Action: Apply kernel patches addressing CVE-2026-74592 when available through distribution updates.

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: medium — CVSS 5.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74592

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-2026-745920.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74592	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

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
criticalCVE-2025-59326: CPSD CryptoPro Secure Disk for Bitlocker before v7.7.4 fails to enforce IMA policy protections…nvd · 2026-08-12
lowCVE-2026-74671: ima: fix out-of-bounds read in xattr_verify()msrc · 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