CVE-2026-80536: xfs: bounds-check buffer log item's dirty bitmap

highCVSS 7.1CVE-2026-80536

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: XFS buffer log item dirty bitmap lacks bounds checking, allowing out-of-bounds memory access.
Who is affected: Systems running XFS filesystem with logging enabled on affected kernel versions.
Urgency: High priority; CVSS 7.1 indicates significant risk of memory corruption and potential code execution.
Action: Apply kernel security patch immediately.

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: high — CVSS 7.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80536

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-2026-805360.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80536	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[NEW] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
unknownDSA-6477-1 linux - security updatedebian
highCVE-2026-80536: In the Linux kernel, the following vulnerability has been resolved: xfs: bounds-check buffer l…nvd

Recent advisories for xfs

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.

highCVE-2026-80538: In the Linux kernel, the following vulnerability has been resolved: xfs: propagate errors from…nvd · 2026-08-26
highCVE-2026-80537: In the Linux kernel, the following vulnerability has been resolved: xfs: fix off-by-one in rtr…nvd · 2026-08-26
highCVE-2026-80536: In the Linux kernel, the following vulnerability has been resolved: xfs: bounds-check buffer l…nvd · 2026-08-26
unknownCVE-2026-80535: In the Linux kernel, the following vulnerability has been resolved: xfs: don't double-lock whe…nvd · 2026-08-26
unknownCVE-2026-80534: In the Linux kernel, the following vulnerability has been resolved: xfs: fix ilock leak on err…nvd · 2026-08-26
unknownCVE-2026-80533: In the Linux kernel, the following vulnerability has been resolved: xfs: don't walk off the en…nvd · 2026-08-26