---
id: CVE-2026-46249
title: 'octeontx2-af: Fix PF driver crash with kexec kernel booting'
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 th…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    b7605b9301abc18fbbf2b0e23fdd281fc768955d
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    9769a09afda20a006b528b9e723effcae45965b2
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    57821d1436ba1c6a6973aa32d54166fdec35558c
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    8b5ed7c5417b7013d35b6f2507dab739013ba1a9
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    7d56ba306e93d04696718963fb4cda2883ee7585
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    9c3398e5b3a914b74276d44ab54c49123b89c61a
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    1370736836a18b5e0cd74bcc9cffe11d21f1fe79
  - >-
    Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a <
    2d2d574309e3ae84ee794869a5da8b4c38753a94
  - Linux 4.20
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:12:55.966517Z'
published: '2026-06-03'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:13:46.431Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-46249'
references:
  - url: 'https://git.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d'
  - url: 'https://git.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2'
  - url: 'https://git.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c'
  - url: 'https://git.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9'
  - url: 'https://git.kernel.org/stable/c/7d56ba306e93d04696718963fb4cda2883ee7585'
  - url: 'https://git.kernel.org/stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61a'
  - url: 'https://git.kernel.org/stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79'
  - url: 'https://git.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94'
tags:
  - cve.org
epss: 0.00115
epssPercentile: 0.01532
ingestedAt: '2026-11-06T16:57:43.320Z'
---

## Overview

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

- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < b7605b9301abc18fbbf2b0e23fdd281fc768955d`
- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < 9769a09afda20a006b528b9e723effcae45965b2`
- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < 57821d1436ba1c6a6973aa32d54166fdec35558c`
- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < 8b5ed7c5417b7013d35b6f2507dab739013ba1a9`
- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < 7d56ba306e93d04696718963fb4cda2883ee7585`
- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < 9c3398e5b3a914b74276d44ab54c49123b89c61a`
- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < 1370736836a18b5e0cd74bcc9cffe11d21f1fe79`
- `Linux >= 54494aa5d1e68945dc79feb7c8461cd382e11d8a < 2d2d574309e3ae84ee794869a5da8b4c38753a94`
- `Linux 4.20`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.