What’s Vulnerable › Vulnerabilities

CVE-2023-54105: can: isotp: check CAN address family in isotp_bind()

• Severity: unknown
• 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: 2025-12-24 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: can: isotp: check CAN address family in isotp_bind() Add missing check to block non-AF_CAN binds. Syzbot created some code which matched the right sockaddr struct size but used AF_XDP (0x2C) instead of AF_CAN (0x1D) in the address family field: bind$xdp(r2, &(0x7f0000000540)={0x2c, 0x0, r4, 0x0, r2}, 0x10) ^^^^ This has no funtional impact but the userspace should be notified about the wrong address family field content.

Affected products

• Linux kernel: 5.10 — fixed in 6.3

How to fix

Upgrade to a fixed version: Linux kernel 6.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2fc6f337257f4f7c21ecff429241f7acaa6df4e8
• https://git.kernel.org/stable/c/9427584c2f153d0677ef3bad6f44028c60d728c4
• https://git.kernel.org/stable/c/c6adf659a8ba85913e16a571d5a9bcd17d3d1234
• https://git.kernel.org/stable/c/dd4faace51e41a82a8c0770ee0cc26088f9d9d06
• https://git.kernel.org/stable/c/de3c02383aa678f6799402ac47fdd89cf4bfcaa9

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