CVE-2022-48911

Local privilege escalation via nf_queue socket use-after-free

Published Aug 22, 2024 · Updated Aug 5, 2026

A use-after-free in Linux kernel nf_queue 2.6.29 through 5.16.12 allows local users to disclose or corrupt kernel memory via an NFQUEUE race. __nf_queue calls sock_hold() on state->sk without ensuring that the socket reference count remains nonzero, allowing a dying socket to be reused after release. Exploitation requires CAP_NET_ADMIN obtainable in an unprivileged user and network namespace, and successful abuse allows arbitrary kernel memory read or write, control-flow hijacking, or a kernel panic without victim interaction.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A use-after-free in Linux kernel nf_queue 2.6.29 through 5.16.12 allows local users to disclose or corrupt kernel memory via an NFQUEUE race. __nf_queue calls sock_hold() on state->sk without ensuring that the socket reference count remains nonzero, allowing a dying socket to be reused after release. Exploitation requires CAP_NET_ADMIN obtainable in an unprivileged user and network namespace, and successful abuse allows arbitrary kernel memory read or write, control-flow hijacking, or a kernel panic without victim interaction.

The record

CVE
CVE-2022-48911
Published
Aug 22, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=2.6.29
  2. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <21b27b2baa27423286e9b8d3f0b194d587083d95
  3. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <34dc4a6a7f261736ef7183868a5bddad31c7f9e3
  4. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <43c25da41e3091b31a906651a43e80a2719aa1ff
  5. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <4d05239203fa38ea8a6f31e228460da4cb17a71a
  6. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <c3873070247d9e3c7a6b0cf9bf9b45e8018427b1
  7. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <dcc3cb920bf7ba66ac5e9272293a9ba5f80917ee
  8. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <dd648bd1b33a828f62befa696b206c688da0ec43
  9. Affected versionversion=271b72c7fa82c2c7a795bc16896149933110672d <ef97921ccdc243170fcef857ba2a17cf697aece5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=271b72c7fa82c2c7a795bc16896149933110672d <21b27b2baa27423286e9b8d3f0b194d587083d95; version=271b72c7fa82c2c7a795bc16896149933110672d <34dc4a6a7f261736ef7183868a5bddad31c7f9e3; version=271b72c7fa82c2c7a795bc16896149933110672d <43c25da41e3091b31a906651a43e80a2719aa1ff; version=271b72c7fa82c2c7a795bc16896149933110672d <4d05239203fa38ea8a6f31e228460da4cb17a71a; version=271b72c7fa82c2c7a795bc16896149933110672d <c3873070247d9e3c7a6b0cf9bf9b45e8018427b1; version=271b72c7fa82c2c7a795bc16896149933110672d <dcc3cb920bf7ba66ac5e9272293a9ba5f80917ee; version=271b72c7fa82c2c7a795bc16896149933110672d <dd648bd1b33a828f62befa696b206c688da0ec43; version=271b72c7fa82c2c7a795bc16896149933110672d <ef97921ccdc243170fcef857ba2a17cf697aece5

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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