01 Record

CVE-2025-22040

ksmbd: fix session use-after-free in multichannel connection

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

ksmbd: fix session use-after-free in multichannel connection

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

0.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 53.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. 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

2025-04-16 14:11Z1 YR AGO

Last updated

2026-08-05 11:56Z2 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

40aa5891007968efae7f55a621578a317a0dcb1b0cd13a3c02451d34d043fea1

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux0626e6641f6b467447c81dd7678a69c66f7746cf to < 596407adb9af1ee75fe7c7529607783d31b66e7f, 0626e6641f6b467447c81dd7678a69c66f7746cf to < 3980770cb1470054e6400fd97668665975726737, 0626e6641f6b467447c81dd7678a69c66f7746cf to < 9069939d762138e232a6f79e3e1462682ed6a17d, 0626e6641f6b467447c81dd7678a69c66f7746cf to < 94c281721d4ed2d972232414b91d98a6f5bdb16b, 0626e6641f6b467447c81dd7678a69c66f7746cf to < 7dfbd4c43eed91dd2548a95236908025707a8dfd, 0626e6641f6b467447c81dd7678a69c66f7746cf to < fa4cdb8cbca7d6cb6aa13e4d8d83d1103f6345db, 5.15—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/596407adb9af1ee75fe7c7529607783d31b66e7f
git.kernel.orghttps://git.kernel.org/stable/c/3980770cb1470054e6400fd97668665975726737
git.kernel.orghttps://git.kernel.org/stable/c/9069939d762138e232a6f79e3e1462682ed6a17d
git.kernel.orghttps://git.kernel.org/stable/c/94c281721d4ed2d972232414b91d98a6f5bdb16b
git.kernel.orghttps://git.kernel.org/stable/c/7dfbd4c43eed91dd2548a95236908025707a8dfd
git.kernel.orghttps://git.kernel.org/stable/c/fa4cdb8cbca7d6cb6aa13e4d8d83d1103f6345db
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.135-1

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

Debian 13

linux
Fixed in 6.12.25-1

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

Debian 14

linux
Fixed in 6.12.25-1

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