CVE-2026-46249
octeontx2-af: Fix PF driver crash with kexec kernel booting
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.20
References 8
git.kernel.org
- stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d
- stable/c/9769a09afda20a006b528b9e723effcae45965b2
- stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c
- stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9
- stable/c/7d56ba306e93d04696718963fb4cda2883ee7585
- stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61a
- stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79
- stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94