CVE-2025-22062

Kernel compromise via concurrent SCTP sysctl writes

Published Apr 16, 2025 · Updated Aug 5, 2026

Race condition in the Linux kernel allows local users to crash or compromise the kernel via concurrent writes to an SCTP sysctl. proc_sctp_do_udp_port() fails to serialize sctp_udp_sock_stop() and sctp_udp_sock_start(), allowing two threads to release the same socket and use freed kernel memory. A local user can obtain the required namespace capability through an unprivileged user and network namespace, and the race can cause a kernel panic or control-flow hijack.

CVSS severity7.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel allows local users to crash or compromise the kernel via concurrent writes to an SCTP sysctl. proc_sctp_do_udp_port() fails to serialize sctp_udp_sock_stop() and sctp_udp_sock_start(), allowing two threads to release the same socket and use freed kernel memory. A local user can obtain the required namespace capability through an unprivileged user and network namespace, and the race can cause a kernel panic or control-flow hijack.

The record

CVE
CVE-2025-22062
Published
Apr 16, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE 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=046c052b475e7119b6a30e3483e2888fc606a2f8 <10206302af856791fbcc27a33ed3c3eb09b2793d
  2. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <386507cb6fb7cdef598ddcb3f0fa37e6ca9e789d
  3. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <65ccb2793da7401772a3ffe85355c831b313c59f
  4. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <b3598f53211ba1025485306de2733bdd241311a3
  5. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <d3d7675d77622f6ca1aae14c51f80027b36283f8
  6. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <e5178bfc55b3a78000f0f8298e7ade88783ce581
  7. Affected versionversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <efb8cb487be8f4ba6aaef616011d702d6a083ed1
  8. Affected versionversion=5.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=046c052b475e7119b6a30e3483e2888fc606a2f8 <10206302af856791fbcc27a33ed3c3eb09b2793d; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <386507cb6fb7cdef598ddcb3f0fa37e6ca9e789d; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <65ccb2793da7401772a3ffe85355c831b313c59f; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <b3598f53211ba1025485306de2733bdd241311a3; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <d3d7675d77622f6ca1aae14c51f80027b36283f8; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <e5178bfc55b3a78000f0f8298e7ade88783ce581; version=046c052b475e7119b6a30e3483e2888fc606a2f8 <efb8cb487be8f4ba6aaef616011d702d6a083ed1; version=5.11

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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

T1068Exploitation for Privilege Escalation

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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