What’s Vulnerable › Vulnerabilities

CVE-2022-49845: can: j1939: j1939_send_one(): fix missing CAN header initialization

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-01 · updated 2026-06-17
• Weakness: CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_send_one(): fix missing CAN header initialization The read access to struct canxl_frame::len inside of a j1939 created skbuff revealed a missing initialization of reserved and later filled elements in struct can_frame. This patch initializes the 8 byte CAN header with zero.

Affected products

• Linux kernel: from 5.4 before 5.4.225; from 5.5 before 5.10.155; from 5.11 before 5.15.79; from 5.16 before 6.0.9; 6.1-rc1, 6.1-rc2, 6.1-rc3, 6.1-rc4 — fixed in 5.10.155, 5.15.79, 5.4.225, 6.0.9

How to fix

Upgrade to a fixed version: Linux kernel 5.10.155, 5.15.79, 5.4.225, 6.0.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2719f82ad5d8199cf5f346ea8bb3998ad5323b72
• https://git.kernel.org/stable/c/3eb3d283e8579a22b81dd2ac3987b77465b2a22f
• https://git.kernel.org/stable/c/69e86c6268d59ceddd0abe9ae8f1f5296f316c3c
• https://git.kernel.org/stable/c/d0513b095e1ef1469718564dec3fb3348556d0a8
• https://git.kernel.org/stable/c/f8e0edeaa0f2b860bdbbf0aafb4492533043d650

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