CVE-2022-49697

Service interruption via leaked request-socket references

Published Feb 26, 2025 · Updated May 11, 2026

Memory leak in Linux kernel BPF socket lookup helpers from 5.2 allows local users to exhaust kernel memory and interrupt service. A lookup can acquire a child request_socket reference but return its parent LISTEN socket through sk_to_full_sk() without first decrementing the child reference. Exploitation requires local low-privileged access and the ability to run a BPF program that exercises the affected socket-lookup path.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux kernel BPF socket lookup helpers from 5.2 allows local users to exhaust kernel memory and interrupt service. A lookup can acquire a child request_socket reference but return its parent LISTEN socket through sk_to_full_sk() without first decrementing the child reference. Exploitation requires local low-privileged access and the ability to run a BPF program that exercises the affected socket-lookup path.

The record

CVE
CVE-2022-49697
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
Unavailable

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=5.2
  2. Affected versionversion=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <3046a827316c0e55fc563b4fb78c93b9ca5c7c37
  3. Affected versionversion=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <516760f1d2979903eaad5b437256913c5cd98416
  4. Affected versionversion=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <5a62b5ba4c0ce8315b6382cd4ace81b48cd121cd
  5. Affected versionversion=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <8ffe2e50e9678c8373027492035f094b130437f1
  6. Affected versionversion=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <b03607437ea81b850599f705096b05b85e7a4a71

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <3046a827316c0e55fc563b4fb78c93b9ca5c7c37; version=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <516760f1d2979903eaad5b437256913c5cd98416; version=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <5a62b5ba4c0ce8315b6382cd4ace81b48cd121cd; version=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <8ffe2e50e9678c8373027492035f094b130437f1; version=edbf8c01de5a104a71ed6df2bf6421ceb2836a8e <b03607437ea81b850599f705096b05b85e7a4a71

Published CVSS scores

5.5Red HatCVSS: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

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
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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