CVE-2026-46249

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

MEDIUM

5.5

CVSS Score

Published: June 3, 2026 at 03:49 PM UTC

Updated: July 22, 2026 at 08:24 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

4.20 ≤ v < 5.10.2524.20 ≤ v < 5.15.2024.20 ≤ v < 6.1.1654.20 ≤ v < 6.12.754.20 ≤ v < 6.18.144.20 ≤ v < 6.19.44.20 ≤ v < 6.6.1284.20 ≤ v < 7.05.11 ≤ v < 5.15.2025.16 ≤ v < 6.1.1656.13 ≤ v < 6.18.146.19 ≤ v < 6.19.46.2 ≤ v < 6.6.1286.7 ≤ v < 6.12.754.2054494aa5d1e68945dc79feb7c8461cd382e11d8a

Vendor states this is fixed in 1370736836a18b5e0cd74bcc9cffe11d21f1fe79 (fixed)

Vendor states this is fixed in 2d2d574309e3ae84ee794869a5da8b4c38753a94 (fixed)

Vendor states this is fixed in 57821d1436ba1c6a6973aa32d54166fdec35558c (fixed)

Vendor states this is fixed in 7d56ba306e93d04696718963fb4cda2883ee7585 (fixed)

Vendor states this is fixed in 8b5ed7c5417b7013d35b6f2507dab739013ba1a9 (fixed)

Vendor states this is fixed in 9769a09afda20a006b528b9e723effcae45965b2 (fixed)

Vendor states this is fixed in 9c3398e5b3a914b74276d44ab54c49123b89c61a (fixed)

Vendor states this is fixed in b7605b9301abc18fbbf2b0e23fdd281fc768955d (fixed)

Vendor states this is fixed in 4.20 (unaffected)

Vendor states this is fixed in 5.10.252 (unaffected)

Vendor states this is fixed in 5.15.202 (unaffected)

Vendor states this is fixed in 6.1.165 (unaffected)