CVE-2023-54105
Published Dec 24, 2025
Modified Apr 15, 2026
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$xdp(r2, &(0x7f0000000540)={0x2c, 0x0, r4, 0x0, r2}, 0x10) ^^^^ This has no funtional impact but the userspace should be notified about the wrong address family field content.
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References
Other References
https://git.kernel.org/stable/c/2fc6f337257f4f7c21ecff429241f7acaa6df4e8
https://git.kernel.org/stable/c/9427584c2f153d0677ef3bad6f44028c60d728c4
https://git.kernel.org/stable/c/c6adf659a8ba85913e16a571d5a9bcd17d3d1234
https://git.kernel.org/stable/c/dd4faace51e41a82a8c0770ee0cc26088f9d9d06
https://git.kernel.org/stable/c/de3c02383aa678f6799402ac47fdd89cf4bfcaa9
Frequently Asked Questions
What is CVE-2023-54105? +
In the Linux kernel, the following vulnerability has been resolved:
can: isotp: check CAN address family in isotp_bind()
Add missing check to block non-AF_CAN binds.
Syzbot created some code which matched the right sockaddr struct size
but used AF_XDP (0x2C) instead of AF_CAN (0x1D) in the address family
field:
bind$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.
How do I check if I'm vulnerable to CVE-2023-54105? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.