CVE-2023-53793

Process memory leak via missing perf_env cleanup

Published Dec 9, 2025 · Updated May 11, 2026

Memory leak in the x86 perf tool in Linux 6.1 allows local users to consume process memory during AMD CPU detection. x86__is_amd_cpu initializes a perf_env and perf_env__cpuid duplicates the CPUID string into env.cpuid, but the function omitted perf_env__exit. The condition occurs during local perf event configuration, and the published sanitizer trace measured a 21-byte leak per execution without reporting a crash or broader system impact.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
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 x86 perf tool in Linux 6.1 allows local users to consume process memory during AMD CPU detection. x86__is_amd_cpu initializes a perf_env and perf_env__cpuid duplicates the CPUID string into env.cpuid, but the function omitted perf_env__exit. The condition occurs during local perf event configuration, and the published sanitizer trace measured a 21-byte leak per execution without reporting a crash or broader system impact.

The record

CVE
CVE-2023-53793
Published
Dec 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 9, 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=6.1
  2. Affected versionversion=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <010139bfc6bb9ddab81dbc2cf71cd3a9c28adc7f
  3. Affected versionversion=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <75d65c1cc439606ada882755fd205d13c2c7907d
  4. Affected versionversion=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <99d4850062a84564f36923764bb93935ef2ed108
  5. Affected versionversion=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <f3daf02a41e3c11e1a473517a8a6169248fb8e7b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <010139bfc6bb9ddab81dbc2cf71cd3a9c28adc7f; version=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <75d65c1cc439606ada882755fd205d13c2c7907d; version=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <99d4850062a84564f36923764bb93935ef2ed108; version=f7b58cbdb3ff36eba8622e67eee66c10dd1c9995 <f3daf02a41e3c11e1a473517a8a6169248fb8e7b

Published CVSS scores

No CVSS assessment is available in this record.

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

No sourced classifications are available.

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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