CVE-2025-21927: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

highCVSS 7.8CVE-2025-21927

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: A buffer overrun or uninitialized memory access in the NVMe-TCP receive path (nvme_tcp_recv_pdu) causes memory corruption.
Who is affected: Systems with NVMe-TCP storage configured running affected kernel versions.
Urgency: High urgency; CVSS 7.8 and memory corruption in storage driver warrant urgent kernel patching.
Action: Apply Linux kernel updates fixing memory handling in nvme_tcp_recv_pdu().

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: high — CVSS 7.8
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21927

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-2025-219270.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-21927	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund

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