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VulnerabilityPublished Updated

CVE-2026-46249: Linux kernel · octeontx2-af: Fix PF driver crash with kexec kernel booting

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in b7605b9301abc18fbbf2b0e23fdd281fc768955d : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:34 UTC

Severity
Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch
Available – fixed in b7605b9301abc18fbbf2b0e23fdd281fc768955d, 1370736836a18b5e0cd74bcc9cffe11d21f1fe79, 57821d1436ba1c6a6973aa32d54166fdec35558c +5

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 54494aa5d1e68945dc79feb7c8461cd382e11d8a, < b7605b9301abc18fbbf2b0e23fdd281fc768955d
Fixed in
  • b7605b9301abc18fbbf2b0e23fdd281fc768955d
LinuxLinuxAffected
  • ≥ 54494aa5d1e68945dc79feb7c8461cd382e11d8a, < 1370736836a18b5e0cd74bcc9cffe11d21f1fe79
Fixed in
  • 1370736836a18b5e0cd74bcc9cffe11d21f1fe79
LinuxLinuxAffected
  • ≥ 54494aa5d1e68945dc79feb7c8461cd382e11d8a, < 57821d1436ba1c6a6973aa32d54166fdec35558c
Fixed in
  • 57821d1436ba1c6a6973aa32d54166fdec35558c
LinuxLinuxAffected
  • ≥ 54494aa5d1e68945dc79feb7c8461cd382e11d8a, < 9769a09afda20a006b528b9e723effcae45965b2
Fixed in
  • 9769a09afda20a006b528b9e723effcae45965b2
LinuxLinuxAffected
  • ≥ 54494aa5d1e68945dc79feb7c8461cd382e11d8a, < 9c3398e5b3a914b74276d44ab54c49123b89c61a
Fixed in
  • 9c3398e5b3a914b74276d44ab54c49123b89c61a
LinuxLinuxAffected
  • ≥ 54494aa5d1e68945dc79feb7c8461cd382e11d8a, < 8b5ed7c5417b7013d35b6f2507dab739013ba1a9
Fixed in
  • 8b5ed7c5417b7013d35b6f2507dab739013ba1a9

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.

References

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