CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-52956: libceph: Fix potential out-of-bounds access in __ceph_x_decrypt()

criticalCVSS 9.8CVE-2026-52956

CSIRTS triage

vendor: Linuxproduct: libcephOther
What
There is a critical out-of-bounds access vulnerability in the __ceph_x_decrypt function.
Who is affected
Deployments using the libceph library.
Urgency
Remediation is very urgent due to the critical severity and high CVSS score, with no current exploitation reported.
Action
Update to the latest version of libceph that resolves this vulnerability.

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

⚡ Watch libceph

Get an email when a new libceph advisory drops — max one per day, one-click unsubscribe.

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-2026-52956

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-52956coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for libceph

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.

More from Microsoft Security Response Center