CVE-2022-3629

Local denial of service via unbalanced socket references

Published Oct 21, 2022 · Updated Apr 23, 2025

Memory leak in Linux Kernel vsock_connect allows local users to consume kernel memory through repeated connection requests. A pending connect_work makes scheduling return without adding another timeout, yet vsock_connect still calls sock_hold, leaving two holds for one sock_put. Reaching the leak requires nonblocking connects around a signal-interrupted blocking connect; each sequence leaves a socket reference unreleased.

CVSS severity3.3
Low
EPSS probability0.34%
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 vsock_connect allows local users to consume kernel memory through repeated connection requests. A pending connect_work makes scheduling return without adding another timeout, yet vsock_connect still calls sock_hold, leaving two holds for one sock_put. Reaching the leak requires nonblocking connects around a signal-interrupted blocking connect; each sequence leaves a socket reference unreleased.

The record

CVE
CVE-2022-3629
Published
Oct 21, 2022
Updated
Apr 23, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=n/a

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
2.6VulDBCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
2.5SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

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-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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