CVE-2024-57903

Local service interrupt via crypto socket destruction

Published Jan 15, 2025 · Updated May 23, 2026

Improper locking in the Linux kernel allows local users to interrupt service by applying SO_REUSEPORT to an AF_ALG crypto socket. The generic socket-option path accepts SO_REUSEPORT for the crypto socket, allowing its destructor to run in an RCU callback that acquires a mutex. The attacker needs low-privileged local execution; published records do not specify whether the invalid-context fault hangs, crashes, or reboots the host.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel allows local users to interrupt service by applying SO_REUSEPORT to an AF_ALG crypto socket. The generic socket-option path accepts SO_REUSEPORT for the crypto socket, allowing its destructor to run in an RCU callback that acquires a mutex. The attacker needs low-privileged local execution; published records do not specify whether the invalid-context fault hangs, crashes, or reboots the host.

The record

CVE
CVE-2024-57903
Published
Jan 15, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 15, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1e24f532c736b3f99f3fe7c4be66414c40df5f02
  2. Affected versionversion=4.14.148 <4.15
  3. Affected versionversion=4.19.78 <4.20
  4. Affected versionversion=4.9.196 <4.10
  5. Affected versionversion=50b26ba8938f1741523ca733aa9a548a12b6edd6
  6. Affected versionversion=5.2.20 <5.3
  7. Affected versionversion=5.3.5 <5.4
  8. Affected versionversion=5.4
  9. Affected versionversion=62241d6d9e497ad16372b74d2afa3340128e8e57
  10. Affected versionversion=7e2777fd4816cdf6bff5de9e5221514f36dddfbf
  11. Affected versionversion=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <3257813a3ae7462ac5cde04e120806f0c0776850
  12. Affected versionversion=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <579cfa595af1e00ccc9c3a849a4add6bba8b4bad
  13. Affected versionversion=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <5b0af621c3f6ef9261cf6067812f2fd9943acb4b
  14. Affected versionversion=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <ad2ad4cd11af9d63187cd074314b71b7cf8a2a59
  15. Affected versionversion=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <ad91a2dacbf8c26a446658cdd55e8324dfeff1e7
  16. Affected versionversion=d5b1db1c7ce4198bbbd51160350bdd446c8ed2ba

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1e24f532c736b3f99f3fe7c4be66414c40df5f02; version=4.14.148 <4.15; version=4.19.78 <4.20; version=4.9.196 <4.10; version=50b26ba8938f1741523ca733aa9a548a12b6edd6; version=5.2.20 <5.3; version=5.3.5 <5.4; version=5.4; version=62241d6d9e497ad16372b74d2afa3340128e8e57; version=7e2777fd4816cdf6bff5de9e5221514f36dddfbf; version=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <3257813a3ae7462ac5cde04e120806f0c0776850; version=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <579cfa595af1e00ccc9c3a849a4add6bba8b4bad; version=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <5b0af621c3f6ef9261cf6067812f2fd9943acb4b; version=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <ad2ad4cd11af9d63187cd074314b71b7cf8a2a59; version=8c7138b33e5c690c308b2a7085f6313fdcb3f616 <ad91a2dacbf8c26a446658cdd55e8324dfeff1e7; version=d5b1db1c7ce4198bbbd51160350bdd446c8ed2ba

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5OracleCVSS: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
T1499Endpoint Denial of Service

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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