CVE-2024-56645

can: j1939: j1939_session_new(): fix skb reference counting

MEDIUM

5.5

CVSS Score

Published: December 27, 2024 at 03:02 PM UTC

Updated: August 5, 2026 at 12:44 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.7%

Description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_session_new(): fix skb reference counting Since j1939_session_skb_queue() does an extra skb_get() for each new skb, do the same for the initial one in j1939_session_new() to avoid refcount underflow. [mkl: clean up commit message]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.11 ≤ v < 5.15.1745.16 ≤ v < 6.1.1205.4 ≤ v < 5.10.2315.4 ≤ v < 5.15.1745.4 ≤ v < 5.4.2875.4 ≤ v < 6.1.1205.4 ≤ v < 6.12.55.4 ≤ v < 6.135.4 ≤ v < 6.6.665.5 ≤ v < 5.10.2316.2 ≤ v < 6.6.666.7 ≤ v < 6.12.56.13 rc19d71dd0c70099914fcd063135da3c580865e924c

Vendor states this is fixed in 224e606a8d8e8c7db94036272c47a37455667313 (fixed)

Vendor states this is fixed in 4199dd78a59896e091d3a7a05a77451aa7fd724d (fixed)

Vendor states this is fixed in 426d94815e12b6bdb9a75af294fbbafb9301601d (fixed)

Vendor states this is fixed in 68fceb143b635cdc59fed3896d5910aff38f345e (fixed)

Vendor states this is fixed in a8c695005bfe6569acd73d777ca298ddddd66105 (fixed)

Vendor states this is fixed in b3282c2bebeeb82ceec492ee4972f51ee7a4a132 (fixed)

Vendor states this is fixed in f117cba69cbbd496babb3defcdf440df4fd6fe14 (fixed)

Vendor states this is fixed in 5.10.231 (unaffected)

Vendor states this is fixed in 5.15.174 (unaffected)

Vendor states this is fixed in 5.4 (unaffected)

Vendor states this is fixed in 5.4.287 (unaffected)

Vendor states this is fixed in 6.1.120 (unaffected)