CVE-2026-68157: libceph: guard missing CRUSH type name lookup

mediumCVSS 5.5CVE-2026-68157

CSIRTS triage

product: libceph (Ceph distributed storage)Information disclosure

What: Missing guard on CRUSH type name lookup can cause information disclosure or crash when processing cluster maps with invalid type IDs.
Who is affected: Systems running Ceph clients or daemons processing untrusted cluster map data.
Urgency: Moderate urgency; CVSS 5.5 indicates potential denial of service or information disclosure from malformed cluster maps.
Action: Apply libceph patch adding guards to CRUSH type name lookups.

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: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68157

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-2026-681570.69% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 50% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68157	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-68157: In the Linux kernel, the following vulnerability has been resolved: libceph: guard missing CRU…nvd

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.

highCVE-2026-68433: In the Linux kernel, the following vulnerability has been resolved: libceph: bound get_version…nvd · 2026-08-12
mediumCVE-2026-68154: libceph: reject zero bucket types in crush_decodemsrc · 2026-08-11
criticalCVE-2026-68153: libceph: remove debugfs files before client teardownmsrc · 2026-08-11
mediumCVE-2026-68158: libceph: Fix multiplication overflow in decode_new_up_state_weight()msrc · 2026-08-11
highCVE-2026-68082: libceph: fix two unsafe bare decodes in decode_lockers()msrc · 2026-08-11
mediumCVE-2026-68159: libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZEmsrc · 2026-08-11