CVE-2026-46249
octeontx2-af: Fix PF driver crash with kexec kernel booting
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.
INFO
Published Date :
June 3, 2026, 6:16 p.m.
Last Modified :
June 9, 2026, 8:37 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Clear RVUM block revision during AF shutdown.
- Ensure AF reinitializes hardware before PF driver probes.
- Apply kernel updates or patches that include this fix.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-46249.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-46249 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-46249
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-46249 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-46249 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jun. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.128 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.75 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.202 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.165 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.10.252 Added Reference Type kernel.org: https://git.kernel.org/stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7d56ba306e93d04696718963fb4cda2883ee7585 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 03, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79 Added Reference https://git.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94 Added Reference https://git.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c Added Reference https://git.kernel.org/stable/c/7d56ba306e93d04696718963fb4cda2883ee7585 Added Reference https://git.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9 Added Reference https://git.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2 Added Reference https://git.kernel.org/stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61a Added Reference https://git.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d