CVE-2026-64222
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0488a0bb344fb1992853b60082acff6be8164d74Patch
- https://git.kernel.org/stable/c/0d9b9d7dbef976ae7f855b6358f1d703014e96eaPatch
- https://git.kernel.org/stable/c/4c29603498b05c049dbbbc47e882f2fbf0193cd7Patch
- https://git.kernel.org/stable/c/94192b0579333c3deee2441379aab8ca98fc2e6bPatch
- https://git.kernel.org/stable/c/9b244c242bec48b37e82b89787afd6a4c43457e1Patch
- https://git.kernel.org/stable/c/b92e7ea408b6f1144648909c9c49a55d245d7300Patch
- https://git.kernel.org/stable/c/c4b8c5d51632538b19ee01cf6d70cbceeefbd3ecPatch
- https://git.kernel.org/stable/c/e6e9bc0bf963662b7042048ab0281014625d4cb4Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.