CVE-2025-21927

Aliases:RHSA-2025:4339RHSA-2025:4340RHSA-2025:4469RHSA-2025:4471RHSA-2025:4496RHSA-2025:4497RHSA-2025:4498RHSA-2025:4499RHSA-2025:7501UBUNTU-CVE-2025-21927DEBIAN-CVE-2025-21927
Advisory lineage Upstream: 0 Downstream: 43
Modified
Published: 01 Apr 2025, 15:40
Last modified:05 Aug 2026, 11:55

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (cve.org)
EPSS Score
0.48% LOW
0% probability +0.42%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Apr 2025, 15:40
Published
Vulnerability first disclosed
05 Aug 2026, 11:55
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v3.1•HIGH•Score: 8CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.48%• Percentile: 41%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • debian•linux

    all | all | < 6.12.19-1 | < 6.12.19-1

  • ubuntu•linux

    all | all | < 6.8.0-84.84

  • ubuntu•linux-allwinner-5.19

    all

  • ubuntu•linux-aws

    all | all | < 6.8.0-1039.41

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.15

    all

  • ubuntu•linux-aws-5.19

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    all

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.2

    all

  • ubuntu•linux-aws-6.5

    all

  • ubuntu•linux-aws-6.8

    < 6.8.0-1039.41~22.04.1

  • ubuntu•linux-aws-fips

    all | < 6.8.0-1039.41+fips1

  • ubuntu•linux-azure

    all | all | all | < 6.8.0-1038.44

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.15

    all

  • ubuntu•linux-azure-5.19

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    all

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.11

    < 6.11.0-1018.18~24.04.1

  • ubuntu•linux-azure-6.2

    all

  • ubuntu•linux-azure-6.5

    all

  • ubuntu•linux-azure-6.8

    < 6.8.0-1036.42~22.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all | all

  • ubuntu•linux-azure-fde-5.19

    all

  • ubuntu•linux-azure-fde-6.2

    all

  • ubuntu•linux-azure-fips

    all | < 6.8.0-1040.46+fips1

  • ubuntu•linux-azure-nvidia

    < 6.8.0-1025.27

  • ubuntu•linux-bluefield

    all | all

  • ubuntu•linux-fips

    all | < 6.8.0-84.84+fips1

  • ubuntu•linux-gcp

    all | all | all | < 6.8.0-1040.42

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.15

    all

  • ubuntu•linux-gcp-5.19

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    all

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-6.11

    < 6.11.0-1016.16~24.04.1

  • ubuntu•linux-gcp-6.2

    all

  • ubuntu•linux-gcp-6.5

    all

  • ubuntu•linux-gcp-6.8

    < 6.8.0-1040.42~22.04.1

  • ubuntu•linux-gcp-fips

    all | < 6.8.0-1040.42+fips1

  • ubuntu•linux-gke

    all | all | < 6.8.0-1036.40

Showing first 50 affected entries in server-rendered view.

References (48)