CVE-2024-38580

Local service interruption via epoll file-lifetime race

Published Jun 19, 2024 · Updated Aug 5, 2026

A file-lifetime race in Linux kernel epoll allows local users to interrupt service by racing file closure with polling. ep_item_poll() passed epi->ffd.file to vfs_poll() without first obtaining a live reference, so the last concurrent fput() could reduce f_count to zero. Local code able to create and close epoll-tracked file descriptors can trigger the race; published scoring limits the consequence to loss of availability.

CVSS severity4.7
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A file-lifetime race in Linux kernel epoll allows local users to interrupt service by racing file closure with polling. ep_item_poll() passed epi->ffd.file to vfs_poll() without first obtaining a live reference, so the last concurrent fput() could reduce f_count to zero. Local code able to create and close epoll-tracked file descriptors can trigger the race; published scoring limits the consequence to loss of availability.

The record

CVE
CVE-2024-38580
Published
Jun 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <16e3182f6322575eb7c12e728ad3c7986a189d5d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4efaa5acf0a1d2b5947f98abb3acf8bfd966422b
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4f65f4defe4e23659275ce5153541cd4f76ce2d2
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <559214eb4e5c3d05e69428af2fae2691ba1eb784
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cbfd1088e24ec4c1199756a37cb8e4cd0a4b016e
  6. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <16e3182f6322575eb7c12e728ad3c7986a189d5d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4efaa5acf0a1d2b5947f98abb3acf8bfd966422b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4f65f4defe4e23659275ce5153541cd4f76ce2d2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <559214eb4e5c3d05e69428af2fae2691ba1eb784; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cbfd1088e24ec4c1199756a37cb8e4cd0a4b016e; version=2.6.12

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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 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

T1499.004Application or System Exploitation

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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