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CVE-2025-21927

7.8 high SSVC exploitation: none Modified
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 3

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 5

  1. CwesCWE-787NVD modified 2026-10-21 13:18
  2. Cpes+6 CPE criteria (now 6)NVD modified 2026-10-21 13:18
  3. StatusPublished → ModifiedNVD modified 2026-10-21 13:18
  4. CVSS9.8 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) → 7.8 (v3.1, CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)NVD modified 2026-10-21 13:18
  5. First seenCVSS 9.8 · linuxNVD modified 2026-10-21 12:36

Affected (CPE criteria) 6

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*

References 4