PT-2026-64337 · Linux · Linux

CVE-2026-64222 · Published 2026-07-24 · Updated 2026-07-24

NVD

In the Linux kernel, the following vulnerability has been resolved:

octeontx2-pf: avoid double free of pool->stack on AQ init failure

otx2 pool aq init() frees pool->stack when mailbox sync or retry allocation fails, but leaves the pointer unchanged. Later, otx2 sq aura pool init() unwinds the partial setup through otx2 aura pool free(), which frees pool->stack again. The CN20K-specific cn20k pool aq init() implementation has the same bug in its corresponding error path.

Set pool->stack to NULL immediately after the local free so the shared cleanup path does not free the same stack again while cleaning up partially initialized pool state.

The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc3.

Runtime validation was not performed because reproducing this path requires OcteonTX2/CN20K hardware.

Related Identifiers

CVE-2026-64222

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-64222 · Security Note
• https://git.kernel.org/stable/c/4c29603498b05c049dbbbc47e882f2fbf0193cd7 · Note
• https://git.kernel.org/stable/c/c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec · Note
• https://git.kernel.org/stable/c/e6e9bc0bf963662b7042048ab0281014625d4cb4 · Note
• https://git.kernel.org/stable/c/94192b0579333c3deee2441379aab8ca98fc2e6b · Note
• https://git.kernel.org/stable/c/0488a0bb344fb1992853b60082acff6be8164d74 · Note
• https://git.kernel.org/stable/c/9b244c242bec48b37e82b89787afd6a4c43457e1 · Note
• https://git.kernel.org/stable/c/b92e7ea408b6f1144648909c9c49a55d245d7300 · Note
• https://git.kernel.org/stable/c/0d9b9d7dbef976ae7f855b6358f1d703014e96ea · Note