CVE-2022-50243

Local privilege escalation via stale SCTP authentication key

Published Sep 15, 2025 · Updated Sep 15, 2025

Use-after-free in the SCTP authentication subsystem in affected Linux kernel releases allows local users to gain kernel privileges. When sctp_auth_asoc_init_active_key fails, sctp_auth_set_key frees the old shared key while the association still retains it, and a later sendmsg dereferences the stale pointer. An ordinary local account can create both SCTP endpoints, force the allocation-error path, and then obtain kernel read, write, or control-flow primitives or crash the host.

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

What happened

Use-after-free in the SCTP authentication subsystem in affected Linux kernel releases allows local users to gain kernel privileges. When sctp_auth_asoc_init_active_key fails, sctp_auth_set_key frees the old shared key while the association still retains it, and a later sendmsg dereferences the stale pointer. An ordinary local account can create both SCTP endpoints, force the allocation-error path, and then obtain kernel read, write, or control-flow primitives or crash the host.

The record

CVE
CVE-2022-50243
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=50b57223da67653c61e405d0a7592355cfe4585e <b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40
  2. Affected versionversion=5.14
  3. Affected versionversion=58acd10092268831e49de279446c314727101292 <022152aaebe116a25c39818a07e175a8cd3c1e11
  4. Affected versionversion=58acd10092268831e49de279446c314727101292 <0f90099d18e3abdc01babf686f41f63fe04939c1
  5. Affected versionversion=58acd10092268831e49de279446c314727101292 <19d636b663e0e92951bba5fced929ca7fd25c552
  6. Affected versionversion=58acd10092268831e49de279446c314727101292 <3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d
  7. Affected versionversion=8eb225873246312660ccd68296959a7b213d0cdd <f65955340e0044f5c41ac799a01698ac7dee8a4e
  8. Affected versionversion=b60461696a0b0fdaf240bc365b7983698f88ded2 <382ff44716603a54f5fd238ddec6a2468e217612
  9. Affected versionversion=c1de376423a7759bf4fa25d6a038a4c1e035c9e1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=50b57223da67653c61e405d0a7592355cfe4585e <b8fa99a3a11bdd77fef6b4a97f1021eb30b5ba40; version=5.14; version=58acd10092268831e49de279446c314727101292 <022152aaebe116a25c39818a07e175a8cd3c1e11; version=58acd10092268831e49de279446c314727101292 <0f90099d18e3abdc01babf686f41f63fe04939c1; version=58acd10092268831e49de279446c314727101292 <19d636b663e0e92951bba5fced929ca7fd25c552; version=58acd10092268831e49de279446c314727101292 <3b0fcf5e29c0940e1169ce9c44f73edd98bdf12d; version=8eb225873246312660ccd68296959a7b213d0cdd <f65955340e0044f5c41ac799a01698ac7dee8a4e; version=b60461696a0b0fdaf240bc365b7983698f88ded2 <382ff44716603a54f5fd238ddec6a2468e217612; version=c1de376423a7759bf4fa25d6a038a4c1e035c9e1

Published CVSS scores

7.8Linux kernel CVE teamCVSS: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

CWE-416Use After Free
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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