01 Record

CVE-2021-4454

can: j1939: fix errant WARN_ON_ONCE in j1939_session_deactivate

HighPUBLISHEDCNA: Linux

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 Description

can: j1939: fix errant WARN_ON_ONCE in j1939_session_deactivate

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.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited 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

0.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 47.9% 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

Low. 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

2025-03-27 16:37Z1 YR AGO

Last updated

2026-10-15 21:21Z13 DAYS AGO

Reserved

2025-02-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

58be579b4e61fbeacfb91ead551ba658347a06494e8a805f18226ded63442f3e

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux7eef18c0479ba5d9f54fba30cd77c233ebca3eb1 to < 6950df42a03c9ac9290503ced3f371199cb68fa9, 55dd22c5d029423f513fd849e633adf0e9c10d0c to < b6d44072117bba057d50f7a2f96e5d070c65926d, 0c71437dd50dd687c15d8ca80b3b68f10bb21d63 to < 9ab896775f98ff54b68512f345eed178bf961084, 0c71437dd50dd687c15d8ca80b3b68f10bb21d63 to < 1740a1e45eee65099a92fb502e1e67e63aad277d, 0c71437dd50dd687c15d8ca80b3b68f10bb21d63 to < d0553680f94c49bbe0e39eb50d033ba563b4212d, 5e1fc537c1be332aef9621ca9146aeb3ba59522f, 5.4.138 to < 5.4.232, 5.10.56 to < 5.10.168, 5.13.8 to < 5.14, 5.14—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/6950df42a03c9ac9290503ced3f371199cb68fa9
git.kernel.orghttps://git.kernel.org/stable/c/b6d44072117bba057d50f7a2f96e5d070c65926d
git.kernel.orghttps://git.kernel.org/stable/c/9ab896775f98ff54b68512f345eed178bf961084
git.kernel.orghttps://git.kernel.org/stable/c/1740a1e45eee65099a92fb502e1e67e63aad277d
git.kernel.orghttps://git.kernel.org/stable/c/d0553680f94c49bbe0e39eb50d033ba563b4212d

07 Fixed in

Debian 12

linux
Fixed in 6.1.11-1

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

Debian 13

linux
Fixed in 6.1.11-1

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

Debian 14

linux
Fixed in 6.1.11-1

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