CVE-2023-54142

Local privilege escalation via freed GTP socket

Published Dec 24, 2025 · Updated Dec 24, 2025

Use-after-free in Linux kernel GTP socket teardown allows local users to corrupt kernel memory through local socket and rtnetlink calls. __gtp_encap_destroy calls sock_put before release_sock, so the final reference can free the socket before release_sock writes through its lock and callbacks. An unprivileged local user can obtain namespace-scoped CAP_NET_ADMIN; controlled reclamation enables kernel read and write primitives, privilege escalation, a crash, or a hang.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel GTP socket teardown allows local users to corrupt kernel memory through local socket and rtnetlink calls. __gtp_encap_destroy calls sock_put before release_sock, so the final reference can free the socket before release_sock writes through its lock and callbacks. An unprivileged local user can obtain namespace-scoped CAP_NET_ADMIN; controlled reclamation enables kernel read and write primitives, privilege escalation, a crash, or a hang.

The record

CVE
CVE-2023-54142
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=01f3c64e405ab3d25887d080a103ad76f30661d2 <d38039697184aacff1cf576e14ef583112fdefef
  2. Affected versionversion=5.3
  3. Affected versionversion=76357f65f18f180f44ccbbbf713461881d0ab219
  4. Affected versionversion=bf75202df8e473d4ee914894542f213158066d8b
  5. Affected versionversion=e117a04133c673cc54292e12086a8177cd9bd4a4 <e5aa6d829831a55a693dbaeb58f8d22ba7f2b3e6
  6. Affected versionversion=e198987e7dd7d3645a53875151cd6f8fc425b706 <17d6b6354f0025b7c10a56da783fd0cbb3819c5d
  7. Affected versionversion=e198987e7dd7d3645a53875151cd6f8fc425b706 <58fa341327fdb4bdf92597fd8796a9abc8d20ea3
  8. Affected versionversion=e198987e7dd7d3645a53875151cd6f8fc425b706 <9c9662e2512b5e4ee7b03108802c5222e0fa77a4
  9. Affected versionversion=e198987e7dd7d3645a53875151cd6f8fc425b706 <bccc7ace12e69dee4684a3bb4b69737972e570d6
  10. Affected versionversion=e198987e7dd7d3645a53875151cd6f8fc425b706 <ce3aee7114c575fab32a5e9e939d4bbb3dcca79f
  11. Affected versionversion=e198987e7dd7d3645a53875151cd6f8fc425b706 <dae6095bdb24f537b4798ffd9201515b97bac94e
  12. Affected versionversion=e198987e7dd7d3645a53875151cd6f8fc425b706 <ebd6d2077a083329110695a996c00e8ca94bc640

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=01f3c64e405ab3d25887d080a103ad76f30661d2 <d38039697184aacff1cf576e14ef583112fdefef; version=5.3; version=76357f65f18f180f44ccbbbf713461881d0ab219; version=bf75202df8e473d4ee914894542f213158066d8b; version=e117a04133c673cc54292e12086a8177cd9bd4a4 <e5aa6d829831a55a693dbaeb58f8d22ba7f2b3e6; version=e198987e7dd7d3645a53875151cd6f8fc425b706 <17d6b6354f0025b7c10a56da783fd0cbb3819c5d; version=e198987e7dd7d3645a53875151cd6f8fc425b706 <58fa341327fdb4bdf92597fd8796a9abc8d20ea3; version=e198987e7dd7d3645a53875151cd6f8fc425b706 <9c9662e2512b5e4ee7b03108802c5222e0fa77a4; version=e198987e7dd7d3645a53875151cd6f8fc425b706 <bccc7ace12e69dee4684a3bb4b69737972e570d6; version=e198987e7dd7d3645a53875151cd6f8fc425b706 <ce3aee7114c575fab32a5e9e939d4bbb3dcca79f; version=e198987e7dd7d3645a53875151cd6f8fc425b706 <dae6095bdb24f537b4798ffd9201515b97bac94e; version=e198987e7dd7d3645a53875151cd6f8fc425b706 <ebd6d2077a083329110695a996c00e8ca94bc640

Published CVSS scores

7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.3SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.0SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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

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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