CVE-2022-49957

Local service interruption via premature KCM initialization

Published Jun 18, 2025 · Updated May 27, 2026

Use of an uninitialized resource in Linux KCM allows local users to interrupt kernel service through a conflicting socket setup. KCM initializes strp work before checking whether csk->sk_user_data already belongs to KCM, so cleanup can touch the existing psock->strp work state. Low-privileged local access is sufficient, no user interaction is required, and the published impact is limited to availability.

CVSS severity5.5
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

Use of an uninitialized resource in Linux KCM allows local users to interrupt kernel service through a conflicting socket setup. KCM initializes strp work before checking whether csk->sk_user_data already belongs to KCM, so cleanup can touch the existing psock->strp work state. Low-privileged local access is sufficient, no user interaction is required, and the published impact is limited to availability.

The record

CVE
CVE-2022-49957
Published
Jun 18, 2025
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=085cbbda4b4cc7dd2ba63806346881c2c2e10107
  2. Affected versionversion=19042316b9e12c93bf334a04d4dd7a4e846c7311
  3. Affected versionversion=383250363daf01eb7aa3728c09ef8a4f6d8a3252
  4. Affected versionversion=4.14.22 <4.14.293
  5. Affected versionversion=4.15
  6. Affected versionversion=44890e9ff771ef11777b2d1ebf8589255eb12502 <473f394953216614087f4179e55cdf0cf616a13b
  7. Affected versionversion=4.9.100 <4.10
  8. Affected versionversion=4.9.84 <4.10
  9. Affected versionversion=e5571240236c5652f3e079b1d5866716a7ad819c <0946ff31d1a8778787bf6708beb20f38715267cc
  10. Affected versionversion=e5571240236c5652f3e079b1d5866716a7ad819c <1b6666964ca1de93a7bf06e122bcf3616dbd33a9
  11. Affected versionversion=e5571240236c5652f3e079b1d5866716a7ad819c <55fb8c3baa8071c5d533a9ad48624e44e2a04ef5
  12. Affected versionversion=e5571240236c5652f3e079b1d5866716a7ad819c <8fc29ff3910f3af08a7c40a75d436b5720efe2bf
  13. Affected versionversion=e5571240236c5652f3e079b1d5866716a7ad819c <a8a0c321319ad64a5427d6172cd9c23b4d6ca1e8
  14. Affected versionversion=e5571240236c5652f3e079b1d5866716a7ad819c <f865976baa85915c7672f351b74d5974b93215f6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=085cbbda4b4cc7dd2ba63806346881c2c2e10107; version=19042316b9e12c93bf334a04d4dd7a4e846c7311; version=383250363daf01eb7aa3728c09ef8a4f6d8a3252; version=4.14.22 <4.14.293; version=4.15; version=44890e9ff771ef11777b2d1ebf8589255eb12502 <473f394953216614087f4179e55cdf0cf616a13b; version=4.9.100 <4.10; version=4.9.84 <4.10; version=e5571240236c5652f3e079b1d5866716a7ad819c <0946ff31d1a8778787bf6708beb20f38715267cc; version=e5571240236c5652f3e079b1d5866716a7ad819c <1b6666964ca1de93a7bf06e122bcf3616dbd33a9; version=e5571240236c5652f3e079b1d5866716a7ad819c <55fb8c3baa8071c5d533a9ad48624e44e2a04ef5; version=e5571240236c5652f3e079b1d5866716a7ad819c <8fc29ff3910f3af08a7c40a75d436b5720efe2bf; version=e5571240236c5652f3e079b1d5866716a7ad819c <a8a0c321319ad64a5427d6172cd9c23b4d6ca1e8; version=e5571240236c5652f3e079b1d5866716a7ad819c <f865976baa85915c7672f351b74d5974b93215f6

Published CVSS scores

5.5NIST NVDCVSS: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-908Use of Uninitialized Resource
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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