Review reviewHigh

CVE-2023-54042

Linux

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix VAS mm use after free The refcount on mm is dropped before the coprocessor is detached.

CVSS: 7.8
EPSS: 0.12%
CISA KEV: Not listed
Published: 2025.12.24

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.12%

Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix VAS mm use after free The refcount on mm is dropped before the coprocessor is detached.

Affected product and versions

Product: Linux
Affected versions: >= 7bc6f71bdff5f8921e324da0a8fad6f4e2e63a85 < f7d92313002b2d543500cc417d8079aaed1fb0a8, >= 7bc6f71bdff5f8921e324da0a8fad6f4e2e63a85 < 4e82f92c349ea603736ade1e814861c0182a55ad, >= 7bc6f71bdff5f8921e324da0a8fad6f4e2e63a85 < db8657fdd53c5e3069149d7f957cb60e63027bb2, >= 7bc6f71bdff5f8921e324da0a8fad6f4e2e63a85 < 421cd1544480f2458042fe7f4913a2069c4d7251, >= 7bc6f71bdff5f8921e324da0a8fad6f4e2e63a85 < b4bda59b47879cce38a6ec5a01cd3cac702b5331, >= 5.14
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