CVE-2026-80789: nvmet-tcp: bound SGL data length before allocating command buffers

highCVSS 7.5CVE-2026-80789

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80789

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-2026-807890.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80789	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

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.

highCVE-2026-80788: nvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocationsmsrc · 2026-09-08
unknownCVE-2026-80789: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: bound SGL data …nvd · 2026-09-04
unknownCVE-2026-80788: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Do not WARN on …nvd · 2026-09-04
unknownCVE-2026-74386: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: fix page fragme…nvd · 2026-08-15
highCVE-2026-74385: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: check return va…nvd · 2026-08-15
criticalCVE-2026-64535: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Fix potential U…nvd · 2026-07-27