CVE-2026-46249

octeontx2-af: Fix PF driver crash with kexec kernel booting

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.1%

exploitation probability

0.1%top 98% of all CVEs

observed exploitation

nono source reports it

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix PF driver crash with kexec kernel booting During a kexec reboot the hardware is not power-cycled, so AF state from the old kernel can persist into the new kernel. When AF and PF drivers are built as modules, the PF driver may probe before AF reinitializes the hardware. The PF driver treats the RVUM block revision as an indication that AF initialization is complete. If this value is left uncleared at shutdown, PF may incorrectly assume AF is ready and access stale hardware state, leading to a crash. Clear the RVUM block revision during AF shutdown to avoid PF mis-detecting AF readiness after kexec.

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79 https://git.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94 https://git.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c https://git.kernel.org/stable/c/7d56ba306e93d04696718963fb4cda2883ee7585 https://git.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9 https://git.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2 https://git.kernel.org/stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61a https://git.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d