01 Record

CVE-2025-21664

dm thin: make get_first_thin use rcu-safe list first function

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

dm thin: make get_first_thin use rcu-safe list first function

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 14.3% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-15.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published: 2025-01-21 12:18Z1 YR AGO
Last updated: 2026-10-15 21:51Z13 DAYS AGO
Reserved: 2024-12-29
Assigning CNA: Linux
Record state: PUBLISHED
Severity: High (CVSS 7.8)
CNA CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: 081d4c938f0e824c4183ea976bc666db324c62c54653082a6a37efb58a526e02

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxb10ebd34cccae1b431caf1be54919aede2be7cbe to < ec037fe8c0d0f6140e3d8a49c7b29cb5582160b8, b10ebd34cccae1b431caf1be54919aede2be7cbe to < cd30a3960433ec2db94b3689752fa3c5df44d649, b10ebd34cccae1b431caf1be54919aede2be7cbe to < 802666a40c71a23542c43a3f87e3a2d0f4e8fe45, b10ebd34cccae1b431caf1be54919aede2be7cbe to < 12771050b6d059eea096993bf2001da9da9fddff, b10ebd34cccae1b431caf1be54919aede2be7cbe to < 6b305e98de0d225ccebfb225730a9f560d28ecb0, b10ebd34cccae1b431caf1be54919aede2be7cbe to < cbd0d5ecfa390ac29c5380200147d09c381b2ac6, b10ebd34cccae1b431caf1be54919aede2be7cbe to < 80f130bfad1dab93b95683fc39b87235682b8f72, 3.15—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/ec037fe8c0d0f6140e3d8a49c7b29cb5582160b8
git.kernel.orghttps://git.kernel.org/stable/c/cd30a3960433ec2db94b3689752fa3c5df44d649
git.kernel.orghttps://git.kernel.org/stable/c/802666a40c71a23542c43a3f87e3a2d0f4e8fe45
git.kernel.orghttps://git.kernel.org/stable/c/12771050b6d059eea096993bf2001da9da9fddff
git.kernel.orghttps://git.kernel.org/stable/c/6b305e98de0d225ccebfb225730a9f560d28ecb0
git.kernel.orghttps://git.kernel.org/stable/c/cbd0d5ecfa390ac29c5380200147d09c381b2ac6
git.kernel.orghttps://git.kernel.org/stable/c/80f130bfad1dab93b95683fc39b87235682b8f72
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-265688.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.128-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.12.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.