Linux Kernel up to 7.0.10 octeontx2-pf otx2_pool_aq_init stack double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k3.11

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.0.10. It has been classified as very critical. The impacted element is the function otx2_pool_aq_init of the component octeontx2-pf. The manipulation of the argument stack leads to double free. This vulnerability is documented as CVE-2026-64222. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Linux Kernel up to 7.0.10. This issue affects the function otx2_pool_aq_init of the component octeontx2-pf. The manipulation of the argument stack with an unknown input leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-64222 since 07/19/2026. The exploitation is known to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/24/2026).

Upgrading to version 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35 or 7.0.11 eliminates this vulnerability. Applying the patch e6e9bc0bf963662b7042048ab0281014625d4cb4/b92e7ea408b6f1144648909c9c49a55d245d7300/94192b0579333c3deee2441379aab8ca98fc2e6b/4c29603498b05c049dbbbc47e882f2fbf0193cd7/0488a0bb344fb1992853b60082acff6be8164d74/0d9b9d7dbef976ae7f855b6358f1d703014e96ea/c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec/9b244c242bec48b37e82b89787afd6a4c43457e1 is able to eliminate this problem.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.259/5.15.210/6.1.176/6.6.143/6.12.93/6.18.35/7.0.11
Patch: e6e9bc0bf963662b7042048ab0281014625d4cb4/b92e7ea408b6f1144648909c9c49a55d245d7300/94192b0579333c3deee2441379aab8ca98fc2e6b/4c29603498b05c049dbbbc47e882f2fbf0193cd7/0488a0bb344fb1992853b60082acff6be8164d74/0d9b9d7dbef976ae7f855b6358f1d703014e96ea/c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec/9b244c242bec48b37e82b89787afd6a4c43457e1

Timelineinfo

07/19/2026 CVE reserved
07/24/2026 +5 days Advisory disclosed
07/24/2026 +0 days VulDB entry created
07/24/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-64222 (🔒)
GCVE (CVE): GCVE-0-2026-64222
GCVE (VulDB): GCVE-100-382961

Entryinfo

Created: 07/24/2026 18:27
Changes: 07/24/2026 18:27 (60)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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