Use-after-free in Linux kernel - CVE-2026-80613
Published: August 28, 2026
Vulnerability identifier: #VU146261
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-80613
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a use-after-free.
The vulnerability exists due to a use-after-free in the veth XDP enablement error-handling logic when rolling back queue initialization after failed XDP rxq registration. A local user can trigger XDP enablement failure to cause a use-after-free.
The issue occurs because a previously added NAPI structure is left dangling in the device NAPI list and may later corrupt reallocated memory during device teardown.
Affected software
Linux kernel
How to mitigate CVE-2026-80613
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/4559770b2a241344d762719e674241fcc8528f02
- https://git.kernel.org/stable/c/4bd2e5dbe62334aae1182d0f0d260f334a49d739
- https://git.kernel.org/stable/c/6739027cb72da26890edd424c77080d187b2a92e
- https://git.kernel.org/stable/c/83090f5e7b54721d71875a6c224d2490b9e73050
- https://git.kernel.org/stable/c/a9e6707322ef215d39d4655b176c094f45f0ab52
- https://git.kernel.org/stable/c/d3eb258ad398cc9402bab3a5e730cd7c5b34efad
- https://git.kernel.org/stable/c/fc51373345e7e6ea73da2650cb497309c50b077a