CVE-2023-53745

Service interruption via leaked vector configuration memory

Published Dec 8, 2025 · Updated May 11, 2026

Memory leak in the Linux kernel UML vector driver allows local users to interrupt service through malformed interface configuration. In vector_config, a NULL return from uml_parse_vector_ifspec exits the error path without freeing the allocated params buffer. Reaching the flaw requires local access and the ability to supply UML vector interface parameters; repeated failures consume kernel memory.

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

Memory leak in the Linux kernel UML vector driver allows local users to interrupt service through malformed interface configuration. In vector_config, a NULL return from uml_parse_vector_ifspec exits the error path without freeing the allocated params buffer. Reaching the flaw requires local access and the ability to supply UML vector interface parameters; repeated failures consume kernel memory.

The record

CVE
CVE-2023-53745
Published
Dec 8, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 8, 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=4.17
  2. Affected versionversion=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <276a7298af6a801e9a865282605a79303365ec66
  3. Affected versionversion=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <5c49fb5ad01104acc584405572abf6616d45148e
  4. Affected versionversion=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <634a9c139cc1362f6a9cc6cbfe442dbb60ff9f3f
  5. Affected versionversion=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <6480c3a12755bf85d6738ab60967e89b809c701a
  6. Affected versionversion=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <8f88c73afe481f93d40801596927e8c0047b6d96
  7. Affected versionversion=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <c8583b4655aab44a9796b5c4a681ddcc6fe2f0d0
  8. Affected versionversion=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <f2b9c4544e3bd60f353732291300097b0e8d8454

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.17; version=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <276a7298af6a801e9a865282605a79303365ec66; version=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <5c49fb5ad01104acc584405572abf6616d45148e; version=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <634a9c139cc1362f6a9cc6cbfe442dbb60ff9f3f; version=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <6480c3a12755bf85d6738ab60967e89b809c701a; version=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <8f88c73afe481f93d40801596927e8c0047b6d96; version=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <c8583b4655aab44a9796b5c4a681ddcc6fe2f0d0; version=49da7e64f33e80edffb1a9eeb230fa4c3f42dffb <f2b9c4544e3bd60f353732291300097b0e8d8454

Published CVSS scores

5.5SUSECVSS: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

T1499.004Application 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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