Review reviewHigh

CVE-2026-64226

Linux

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().

CVSS: 7.8
EPSS: -
CISA KEV: Not listed
Published: 2026.07.25

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= f0e1a0643a59bf1f922fa209cec86a170b784f3f < cf396941901858b0de426cdcd3974eea6a02c98c, >= f0e1a0643a59bf1f922fa209cec86a170b784f3f < 45c7c4e3db8b700307313c035ea08be829a7f21b, >= f0e1a0643a59bf1f922fa209cec86a170b784f3f < 57e19ba3f58a67eb924022a5a60b67fd08e5cbbd, >= f0e1a0643a59bf1f922fa209cec86a170b784f3f < 9a415cc53711f2238e0f0ca8a6bcc796c003b127, >= 6.12
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available