CVE-2026-64226
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS HIGH
Summary
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Avoid UAF in scx_root_enable_workfn() init failure path In scx_root_enable_workfn(), put_task_struct(p) is called before scx_error() dereferences p->comm and p->pid. If the iterator's reference is the last drop, the task is freed synchronously and the deref becomes a UAF. Move put_task_struct() past scx_error().
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/45c7c4e3db8b700307313c035ea08be829a7f21b ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/45c7c4e3db8b700307313c035ea08be829a7f21bPatch
- https://git.kernel.org/stable/c/57e19ba3f58a67eb924022a5a60b67fd08e5cbbdPatch
- https://git.kernel.org/stable/c/9a415cc53711f2238e0f0ca8a6bcc796c003b127Patch
- https://git.kernel.org/stable/c/cf396941901858b0de426cdcd3974eea6a02c98cPatch