CVE-2022-49207

Service interruption via sockmap teardown memory leak

Published Feb 26, 2025 · Updated May 11, 2026

Missing memory release in the Linux kernel 5.14 through 5.17.1 allows local users to interrupt service through a sockmap teardown race. Concurrent tcp_bpf_sendmsg and sock_map_close paths can enqueue a charged sk_msg after transmission is disabled; drop_sk_msg then discards it without freeing its scatter-gather pages or socket memory charge. Low-privileged local access and the ability to exercise BPF sockmap paths are required, and repeated triggers consume kernel memory and degrade availability.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing memory release in the Linux kernel 5.14 through 5.17.1 allows local users to interrupt service through a sockmap teardown race. Concurrent tcp_bpf_sendmsg and sock_map_close paths can enqueue a charged sk_msg after transmission is disabled; drop_sk_msg then discards it without freeing its scatter-gather pages or socket memory charge. Low-privileged local access and the ability to exercise BPF sockmap paths are required, and repeated triggers consume kernel memory and degrade availability.

The record

CVE
CVE-2022-49207
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE 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=5.14
  2. Affected versionversion=9635720b7c88592214562cb72605bdab6708006c <03948ed6553960db62f1c33bec29e64d7c191a3f
  3. Affected versionversion=9635720b7c88592214562cb72605bdab6708006c <4dd2e947d3be13a4de3b3028859b9a6497266bcf
  4. Affected versionversion=9635720b7c88592214562cb72605bdab6708006c <938d3480b92fa5e454b7734294f12a7b75126f09
  5. Affected versionversion=9635720b7c88592214562cb72605bdab6708006c <ef9785f429794567792561a584901faa9291d3ee

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=9635720b7c88592214562cb72605bdab6708006c <03948ed6553960db62f1c33bec29e64d7c191a3f; version=9635720b7c88592214562cb72605bdab6708006c <4dd2e947d3be13a4de3b3028859b9a6497266bcf; version=9635720b7c88592214562cb72605bdab6708006c <938d3480b92fa5e454b7734294f12a7b75126f09; version=9635720b7c88592214562cb72605bdab6708006c <ef9785f429794567792561a584901faa9291d3ee

Published CVSS scores

5.5CISA ADP VulnrichmentCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-401Missing Release of Memory after Effective Lifetime
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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