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CVE-2023-54042

powerpc/64s: Fix VAS mm use after free

HIGH
7.8
CVSS Score
Published: December 24, 2025 at 10:56 AM UTC
Updated: October 15, 2026 at 10:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
5.147bc6f71bdff5f8921e324da0a8fad6f4e2e63a85
Vendor states this is fixed in 421cd1544480f2458042fe7f4913a2069c4d7251 (fixed)
Vendor states this is fixed in 4e82f92c349ea603736ade1e814861c0182a55ad (fixed)
Vendor states this is fixed in b4bda59b47879cce38a6ec5a01cd3cac702b5331 (fixed)
Vendor states this is fixed in db8657fdd53c5e3069149d7f957cb60e63027bb2 (fixed)
Vendor states this is fixed in f7d92313002b2d543500cc417d8079aaed1fb0a8 (fixed)
Vendor states this is fixed in 5.14 (unaffected)
Vendor states this is fixed in 5.15.121 (unaffected)
Vendor states this is fixed in 6.1.39 (unaffected)
Vendor states this is fixed in 6.3.13 (unaffected)
Vendor states this is fixed in 6.4.4 (unaffected)
Vendor states this is fixed in 6.5 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Source: cverecord
https://git.kernel.org/stable/c/f7d92313002b2d543500cc417d8079aaed1fb0a8
Source: cverecord
https://git.kernel.org/stable/c/4e82f92c349ea603736ade1e814861c0182a55ad
Source: cverecord
https://git.kernel.org/stable/c/db8657fdd53c5e3069149d7f957cb60e63027bb2
Source: cverecord
https://git.kernel.org/stable/c/421cd1544480f2458042fe7f4913a2069c4d7251
Source: cverecord
https://git.kernel.org/stable/c/b4bda59b47879cce38a6ec5a01cd3cac702b5331

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusDEFERRED

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