CVE-2023-52732: ceph: blocklist the kclient when receiving corrupted snap trace

mediumCVSS 5.5CVE-2023-52732

CSIRTS triage

vendor: Ceph product: Ceph Denial of service

What: Ceph kernel client does not blocklist itself when receiving corrupted snap trace, allowing denial of service.
Who is affected: Ceph deployments using kernel client with corrupted snapshot traces.
Urgency: Medium severity (CVSS 5.5) denial of service; patch on normal schedule.
Action: Update Ceph kernel client or upgrade to a patched kernel version.

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-2023-52732

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-2023-527320.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2023-52732	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service and unspecified attackscert-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.

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: ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()msrc · 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