CVE-2026-68433: libceph: bound get_version reply decode to front len

CSIRTS triage

What

The get_version reply decoder does not properly bound the front length, allowing out-of-bounds access.

Who is affected

Ceph deployments using libceph client library connecting to untrusted or compromised servers.

Urgency

Low severity (CVSS 3.7); denial of service or memory corruption risk.

Action

Upgrade libceph to the patched version and validate Ceph cluster integrity.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

low — CVSS 3.7

Published

2026-08-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68433

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-2026-684330.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• high[NEW] [high] Linux Kernel: Multiple Vulnerabilities Enable Unspecified Attackcert-bund
• highCVE-2026-68433: In the Linux kernel, the following vulnerability has been resolved: libceph: bound get_version…nvd

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