CVE-2026-64534: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path

mediumCVSS 6.5CVE-2026-64534

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64534

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-2026-645340.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64534	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownMultiple vulnerabilities in Debian Linux kernel (August 07, 2026)cert-fr-avis
unknownDSA-6405-1 linux - security updatedebian
criticalCVE-2026-64534: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: check INIT_FAIL…nvd

Recent advisories for nvmet-tcp

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.

mediumCVE-2026-64535: nvmet-tcp: Fix potential UAF when ddgst mismatchmsrc · 2026-08-06
criticalCVE-2026-64535: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Fix potential U…nvd · 2026-07-27
criticalCVE-2026-64534: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: check INIT_FAIL…nvd · 2026-07-27
criticalCVE-2026-52989: nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callersmsrc · 2026-06-09