SB20260727360 - Double free in Linux kernel octeontx2 nic driver
Published: July 27, 2026
Security Bulletin ID
SB20260727360
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Double free (CVE-ID: CVE-2026-64222)
CWE-ID: CWE-415 - Double Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to double free in otx2_pool_aq_init() and cn20k_pool_aq_init() when handling allocation or mailbox synchronization failures during pool initialization. A local user can trigger the affected error path to cause a denial of service.
Exploitation requires OcteonTX2 or CN20K hardware.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0488a0bb344fb1992853b60082acff6be8164d74
- https://git.kernel.org/stable/c/0d9b9d7dbef976ae7f855b6358f1d703014e96ea
- https://git.kernel.org/stable/c/4c29603498b05c049dbbbc47e882f2fbf0193cd7
- https://git.kernel.org/stable/c/94192b0579333c3deee2441379aab8ca98fc2e6b
- https://git.kernel.org/stable/c/9b244c242bec48b37e82b89787afd6a4c43457e1
- https://git.kernel.org/stable/c/b92e7ea408b6f1144648909c9c49a55d245d7300
- https://git.kernel.org/stable/c/c4b8c5d51632538b19ee01cf6d70cbceeefbd3ec
- https://git.kernel.org/stable/c/e6e9bc0bf963662b7042048ab0281014625d4cb4