CVE-2026-46249: Linux kernel · octeontx2-af: Fix PF driver crash with kexec kernel booting
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in b7605b9301abc18fbbf2b0e23fdd281fc768955d : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:34 UTC
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
Disclosed: evidence found.
CVE published 3 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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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
- git.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d (opens in a new tab)
- git.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2 (opens in a new tab)
- git.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c (opens in a new tab)
- git.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9 (opens in a new tab)
- git.kernel.org/stable/c/7d56ba306e93d04696718963fb4cda2883ee7585 (opens in a new tab)
- git.kernel.org/stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61a (opens in a new tab)
- git.kernel.org/stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79 (opens in a new tab)
- git.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94 (opens in a new tab)