CVE-2026-43053: xfs: close crash window in attr dabtree inactivation

mediumCVSS 5.5CVE-2026-43053

CSIRTS triage

vendor: Linux product: Linux Kernel Denial of service

What: XFS attribute dabtree inactivation has a crash window that can be exploited to cause a denial of service.
Who is affected: Systems running XFS with attribute management operations.
Urgency: Medium severity; not currently exploited but can cause system crashes.
Action: Apply kernel patch addressing the XFS dabtree inactivation crash window.

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: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43053

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-2026-430530.07% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 0% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-43053	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownMultiple vulnerabilities in SUSE Linux kernel (July 10, 2026)cert-fr-avis
unknownMultiple vulnerabilities in SUSE Linux kernel (July 3, 2026)cert-fr-avis

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.

unknownCVE-2026-74728: In the Linux kernel, the following vulnerability has been resolved: xfs: handle NULL b_addr in…nvd · 2026-08-22
highCVE-2026-43153: xfs: remove xfs_attr_leaf_hasnamemsrc · 2026-08-06
highCVE-2026-64600: xfs: resample the data fork mapping after cycling ILOCKmsrc · 2026-08-06
mediumCVE-2024-41014: xfs: add bounds checking to xlog_recover_process_datamsrc · 2026-08-06
unknownCVE-2026-64357: In the Linux kernel, the following vulnerability has been resolved: xfs: fix exchmaps reservat…nvd · 2026-07-25
unknownCVE-2026-64356: In the Linux kernel, the following vulnerability has been resolved: xfs: fix memory leak in xf…nvd · 2026-07-25