CVE-2024-26741

Local service interruption via stale ehash entry

Published Apr 3, 2024 · Updated May 11, 2026

Resource cleanup error in the Linux kernel allows local users to trigger a kernel warning and service interruption during bhash2 allocation failure. After __inet_check_established() adds an unbound socket to ehash and sets inet_num, the failure path leaves that state in place instead of unhashing the socket. Reachability requires low-privilege local access and rare memory pressure or induced allocation failure; no data access or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource cleanup error in the Linux kernel allows local users to trigger a kernel warning and service interruption during bhash2 allocation failure. After __inet_check_established() adds an unbound socket to ehash and sets inet_num, the failure path leaves that state in place instead of unhashing the socket. Reachability requires low-privilege local access and rare memory pressure or induced allocation failure; no data access or modification is reported.

The record

CVE
CVE-2024-26741
Published
Apr 3, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 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=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <334a8348b2df26526f3298848ad6864285592caf
  2. Affected versionversion=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <66b60b0c8c4a163b022a9f0ad6769b0fd3dc662f
  3. Affected versionversion=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <729bc77af438a6e67914c97f6f3d3af8f72c0131
  4. Affected versionversion=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <f8c4a6b850882bc47aaa864b720c7a2ee3102f39
  5. Affected versionversion=6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <334a8348b2df26526f3298848ad6864285592caf; version=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <66b60b0c8c4a163b022a9f0ad6769b0fd3dc662f; version=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <729bc77af438a6e67914c97f6f3d3af8f72c0131; version=28044fc1d4953b07acec0da4d2fc4784c57ea6fb <f8c4a6b850882bc47aaa864b720c7a2ee3102f39; version=6.1

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS: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

T1499.004Endpoint Denial of Service: Application 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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