CVE-2026-52962: ceph: fix a buffer leak in __ceph_setxattr()

criticalCVSS 9.8CVE-2026-52962

CSIRTS triage

Other

What: The vulnerability involves a buffer leak in __ceph_setxattr().
Who is affected: Deployments using Ceph may be affected.
Urgency: Remediation is critical urgency due to the critical severity rating.
Action: Patch Ceph immediately.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-52962

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-2026-529620.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-52962	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund

Recent advisories for ceph

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.

criticalCVE-2026-52956: libceph: Fix potential out-of-bounds access in __ceph_x_decrypt()msrc · 2026-06-09
highCVE-2026-52961: ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob sizemsrc · 2026-06-09
mediumCVE-2026-52960: ceph: put folios not suitable for writebackmsrc · 2026-06-09