CVE-2026-68160: ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()

criticalCVSS 9.1CVE-2026-68160

CSIRTS triage

vendor: Linux product: Linux kernel Information disclosure

What: A pre-authentication out-of-bounds read in Ceph's ceph_handle_caps() function allows reading memory beyond intended boundaries.
Who is affected: Linux systems running Ceph with network-accessible services.
Urgency: Critical; CVSS 9.1 and pre-authentication exposure require urgent patching despite no active exploitation.
Action: Update to a patched Linux kernel version containing the fix for CVE-2026-68160.

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: critical — CVSS 9.1
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68160

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-2026-681600.76% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68160	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

criticalCVE-2026-68160: In the Linux kernel, the following vulnerability has been resolved: ceph: fix pre-auth out-of-…nvd

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.

unknownMultiple vulnerabilities in Ceph (20 August 2026)cert-fr-avis · 2026-08-20
mediumCVE-2026-68159: libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZEmsrc · 2026-08-11
criticalCVE-2026-68160: In the Linux kernel, the following vulnerability has been resolved: ceph: fix pre-auth out-of-…nvd · 2026-08-10
criticalCVE-2026-68159: In the Linux kernel, the following vulnerability has been resolved: libceph: bound pg_{temp,up…nvd · 2026-08-10
criticalCVE-2026-68158: In the Linux kernel, the following vulnerability has been resolved: libceph: Fix multiplicatio…nvd · 2026-08-10
criticalCVE-2026-68156: In the Linux kernel, the following vulnerability has been resolved: libceph: refresh auth->aut…nvd · 2026-08-10