by Kastro
Paper/Archive/CVE-2025-21927

CVE-2025-21927

Linux Linux — nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 49.7.497 × 209.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() nvme_tcp_recv_pdu() doesn't check the validity of the header length. When header digests are enabled, a target might send a packet with an invalid header length (e.g. 255), causing nvme_tcp_verify_hdgst() to access memory outside the allocated area and cause memory corruptions by overwriting it with the calculated digest. Fix this by rejecting packets with an unexpected header length.

Affected

ProductAffectedFixed inSource
Linux3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 9d22cf5cc94cd7dee84773ec41db78a46107dfa39d22cf5cc94cd7dee84773ec41db78a46107dfa3CNA
Linux3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 9fbc953d6b38bc824392e01850f0aeee3b3487229fbc953d6b38bc824392e01850f0aeee3b348722CNA
Linux3f2304f8c6d6ed97849057bd16fee99e434ca796 – < 22b06c89aa6b2d1ecb8aea72edfb9d53af8d512622b06c89aa6b2d1ecb8aea72edfb9d53af8d5126CNA
Linux3f2304f8c6d6ed97849057bd16fee99e434ca796 – < ad95bab0cd28ed77c2c0d0b6e76e03e031391064ad95bab0cd28ed77c2c0d0b6e76e03e031391064CNA
Linux5.0–CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgit.kernel.org/stable/c/9d22cf5cc94cd7dee84773ec41db78a46107dfa3refgit.kernel.org/stable/c/9fbc953d6b38bc824392e01850f0aeee3b348722refgit.kernel.org/stable/c/22b06c89aa6b2d1ecb8aea72edfb9d53af8d5126refgit.kernel.org/stable/c/ad95bab0cd28ed77c2c0d0b6e76e03e031391064