CVE-2022-48633

Local service interruption via premature mutex destruction

Published Apr 28, 2024 · Updated Aug 12, 2026

A locking-order flaw in Linux kernel 5.19 gma500 allows local users to interrupt service when a graphics object is released. psb_gem_free_object calls drm_gem_object_release before psb_gem_unpin, destroying the reservation object's ww_mutex before dma_resv_lock acquires it. Reachability requires a local process using the gma500 graphics driver; the invalid lock assertion can warn or panic the kernel, depending on panic-on-warning policy.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A locking-order flaw in Linux kernel 5.19 gma500 allows local users to interrupt service when a graphics object is released. psb_gem_free_object calls drm_gem_object_release before psb_gem_unpin, destroying the reservation object's ww_mutex before dma_resv_lock acquires it. Reachability requires a local process using the gma500 graphics driver; the invalid lock assertion can warn or panic the kernel, depending on panic-on-warning policy.

The record

CVE
CVE-2022-48633
Published
Apr 28, 2024
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16dad99de8f2abfcec9836e2031613a713e339d2 <55c077d97fa67e9f19952bb24122a8316b089474
  2. Affected versionversion=16dad99de8f2abfcec9836e2031613a713e339d2 <b6f25c3b94f2aadbf5cbef954db4073614943d74
  3. Affected versionversion=5.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=16dad99de8f2abfcec9836e2031613a713e339d2 <55c077d97fa67e9f19952bb24122a8316b089474; version=16dad99de8f2abfcec9836e2031613a713e339d2 <b6f25c3b94f2aadbf5cbef954db4073614943d74; version=5.19

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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