CVE-2026-64222

Kernel compromise via AQ initialization double free

Published Jul 24, 2026 · Updated Jul 24, 2026

Double free in the Linux kernel octeontx2-pf driver allows local users to compromise the kernel during Accelerated Queue initialization. otx2_pool_aq_init() and cn20k_pool_aq_init() free pool->stack after synchronization or retry allocation fails, leave a stale pointer, and cause otx2_aura_pool_free() to release it again during unwind. Reachability requires OcteonTX2 or CN20K hardware, CAP_NET_ADMIN in the device's network namespace, and a synchronization error or timeout; consequences include kernel-memory corruption and a system crash.

CVSS severity7.0
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in the Linux kernel octeontx2-pf driver allows local users to compromise the kernel during Accelerated Queue initialization. otx2_pool_aq_init() and cn20k_pool_aq_init() free pool->stack after synchronization or retry allocation fails, leave a stale pointer, and cause otx2_aura_pool_free() to release it again during unwind. Reachability requires OcteonTX2 or CN20K hardware, CAP_NET_ADMIN in the device's network namespace, and a synchronization error or timeout; consequences include kernel-memory corruption and a system crash.

The record

CVE
CVE-2026-64222
Published
Jul 24, 2026
Updated
Jul 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-1341, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.6
  2. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <0488a0bb344fb1992853b60082acff6be8164d74
  3. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <0d9b9d7dbef976ae7f855b6358f1d703014e96ea
  4. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <4c29603498b05c049dbbbc47e882f2fbf0193cd7
  5. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <94192b0579333c3deee2441379aab8ca98fc2e6b
  6. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <9b244c242bec48b37e82b89787afd6a4c43457e1
  7. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <b92e7ea408b6f1144648909c9c49a55d245d7300
  8. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec
  9. Affected versionversion=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <e6e9bc0bf963662b7042048ab0281014625d4cb4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.6; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <0488a0bb344fb1992853b60082acff6be8164d74; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <0d9b9d7dbef976ae7f855b6358f1d703014e96ea; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <4c29603498b05c049dbbbc47e882f2fbf0193cd7; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <94192b0579333c3deee2441379aab8ca98fc2e6b; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <9b244c242bec48b37e82b89787afd6a4c43457e1; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <b92e7ea408b6f1144648909c9c49a55d245d7300; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec; version=caa2da34fd25a37e9fd43343b6966fb9d730a6d5 <e6e9bc0bf963662b7042048ab0281014625d4cb4

Published CVSS scores

7.0LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1341Multiple Releases of Same Resource or Handle
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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