CVE-2022-48674

System crash via EROFS pcluster reuse race

Published May 3, 2024 · Updated Aug 5, 2026

A use-after-free in the Linux EROFS compressed-read path allows local users to crash uniprocessor systems through a pcluster race. erofs_workgroup_unfreeze() fails to restore orig_val, permitting a compressed-data pcluster to be reused before deferred RCU freeing completes. The race requires a kernel built with CONFIG_SMP disabled and concurrent EROFS readahead and shrinker activity; the documented consequence is service interruption.

CVSS severity6.2
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A use-after-free in the Linux EROFS compressed-read path allows local users to crash uniprocessor systems through a pcluster race. erofs_workgroup_unfreeze() fails to restore orig_val, permitting a compressed-data pcluster to be reused before deferred RCU freeing completes. The race requires a kernel built with CONFIG_SMP disabled and concurrent EROFS readahead and shrinker activity; the documented consequence is service interruption.

The record

CVE
CVE-2022-48674
Published
May 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=08ec9e6892cc792d7f8fe4d13bd8a0e91fb23488
  2. Affected versionversion=4.19.26 <4.20
  3. Affected versionversion=4.20.13 <4.21
  4. Affected versionversion=5.0
  5. Affected versionversion=73f5c66df3e26ab750cefcb9a3e08c71c9f79cad <2f44013e39984c127c6efedf70e6b5f4e9dcf315
  6. Affected versionversion=73f5c66df3e26ab750cefcb9a3e08c71c9f79cad <8ddd001cef5e82d19192e6861068463ecca5f556
  7. Affected versionversion=73f5c66df3e26ab750cefcb9a3e08c71c9f79cad <94c34faaafe7b55adc2d8d881db195b646959b9e
  8. Affected versionversion=78c46113413bea1cc345757112aa2642e0f66de5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=08ec9e6892cc792d7f8fe4d13bd8a0e91fb23488; version=4.19.26 <4.20; version=4.20.13 <4.21; version=5.0; version=73f5c66df3e26ab750cefcb9a3e08c71c9f79cad <2f44013e39984c127c6efedf70e6b5f4e9dcf315; version=73f5c66df3e26ab750cefcb9a3e08c71c9f79cad <8ddd001cef5e82d19192e6861068463ecca5f556; version=73f5c66df3e26ab750cefcb9a3e08c71c9f79cad <94c34faaafe7b55adc2d8d881db195b646959b9e; version=78c46113413bea1cc345757112aa2642e0f66de5

Published CVSS scores

6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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