Review reviewHigh

CVE-2026-64111

Linux

In the Linux kernel, the following vulnerability has been resolved: lsm: hold cred_guard_mutex for lsm_set_self_attr() Just as proc_pid_attr_write() already does before calling the LSM hook. This only matters for SELinux and AppArmor which check whether the process is being ptraced and if so, whether to allow the transition.

CVSS: 7.1
EPSS: -
CISA KEV: Not listed
Published: 2026.07.20

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.1

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= a04a1198088a1378d0389c250cc684f649bcc91e < 82d3acee88593e3d9e71cad4b7d6b3cf70de9d07, >= a04a1198088a1378d0389c250cc684f649bcc91e < 5b906f31e977286888a9e31282589b545b249139, >= a04a1198088a1378d0389c250cc684f649bcc91e < a010cadaf5727b8417f62fe9021fcef14a5f9b51, >= a04a1198088a1378d0389c250cc684f649bcc91e < 4a9b16541ad3faf8bccb398532bf3f8b6bbf1188, >= 6.8
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:N
CWE: Not available