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 Details
- CVSS 3.1 Base Score: 7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 26, 2026 | Jul 26, 2026 |
| Redhat_linux | — | No solution exists | Jul 30, 2026 | Jul 24, 2026 |
| Ubuntu | — | Upgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-gcpUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-nvidia-7.0Upgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-nvidiaUpgrade linux-image-nvidia-64kUpgrade linux-image-raspiUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-aws-64k-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-raspi-realtimeUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-gcp-64kUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-raspi-7.0Upgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-aws-64kUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-awsUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-gcp-7.0 | Jul 28, 2026 | Jul 28, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 28, 2026 | Jul 24, 2026 |
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