CVE-2024-36882

Task hang via recursive file-backed page reclaim

Published May 30, 2024 · Updated May 11, 2026

Deadlock in affected Linux kernel releases allows local users to hang kernel tasks via large-folio ext4 readahead. page_cache_ra_order() allocates folios while holding a mapping lock but fails to enter a no-filesystem-reclaim context, so allocation can reclaim file-backed pages and wait on the same folio lock. Reachability requires local low-privileged access and an ext4 workload using large folios; the observed consequence is an uninterruptible task hang rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in affected Linux kernel releases allows local users to hang kernel tasks via large-folio ext4 readahead. page_cache_ra_order() allocates folios while holding a mapping lock but fails to enter a no-filesystem-reclaim context, so allocation can reclaim file-backed pages and wait on the same folio lock. Reachability requires local low-privileged access and an ext4 workload using large folios; the observed consequence is an uninterruptible task hang rather than data disclosure or modification.

The record

CVE
CVE-2024-36882
Published
May 30, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.18
  2. Affected versionversion=793917d997df2e432f3e9ac126e4482d68256d01 <30153e4466647a17eebfced13eede5cbe4290e69
  3. Affected versionversion=793917d997df2e432f3e9ac126e4482d68256d01 <468971c3f4b8187f25334503b68050a0e1370147
  4. Affected versionversion=793917d997df2e432f3e9ac126e4482d68256d01 <7629ef6dda1564098aadeef38e5fbd11ee8627c4
  5. Affected versionversion=793917d997df2e432f3e9ac126e4482d68256d01 <cf6a1d16c6df3c30b03f0c6a92a2ba7f86dffb45

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=793917d997df2e432f3e9ac126e4482d68256d01 <30153e4466647a17eebfced13eede5cbe4290e69; version=793917d997df2e432f3e9ac126e4482d68256d01 <468971c3f4b8187f25334503b68050a0e1370147; version=793917d997df2e432f3e9ac126e4482d68256d01 <7629ef6dda1564098aadeef38e5fbd11ee8627c4; version=793917d997df2e432f3e9ac126e4482d68256d01 <cf6a1d16c6df3c30b03f0c6a92a2ba7f86dffb45

Published CVSS scores

5.5NISTCVSS: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

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

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
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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