CVE-2023-53099

Service interruption via sleepable atomic-context allocation

Published May 2, 2025 · Updated May 23, 2026

Improper locking in Linux kernel 5.10 through 6.2.7 allows local users to interrupt service on Xilinx ZynqMP systems. The do_feature_check_call function allocates feature-cache memory with a sleepable flag while the ZynqMP clock-enable path holds an atomic lock. Reachability requires ZynqMP hardware and an uncached firmware feature check; the published trace proves an invalid-context warning but does not identify a crash or hang.

CVSS severity5.5
Medium
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

Improper locking in Linux kernel 5.10 through 6.2.7 allows local users to interrupt service on Xilinx ZynqMP systems. The do_feature_check_call function allocates feature-cache memory with a sleepable flag while the ZynqMP clock-enable path holds an atomic lock. Reachability requires ZynqMP hardware and an uncached firmware feature check; the published trace proves an invalid-context warning but does not identify a crash or hang.

The record

CVE
CVE-2023-53099
Published
May 2, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=5.10
  2. Affected versionversion=5.9.12 <5.10
  3. Affected versionversion=a38a99930883fb1e24f2a34b78a05a6598e86150
  4. Affected versionversion=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <162049c31eb64308afa22e341a257a723526eb5c
  5. Affected versionversion=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <38ed310c22e7a0fc978b1f8292136a4a4a8b3051
  6. Affected versionversion=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <86afb633beaa02ee95b5126a14c9f22cfade4fd9
  7. Affected versionversion=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <9bbab2843f2d1337a268499a1c02b435d2985a17
  8. Affected versionversion=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <b37d3ccbd549494890672136a0e623eb010d46a7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.10; version=5.9.12 <5.10; version=a38a99930883fb1e24f2a34b78a05a6598e86150; version=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <162049c31eb64308afa22e341a257a723526eb5c; version=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <38ed310c22e7a0fc978b1f8292136a4a4a8b3051; version=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <86afb633beaa02ee95b5126a14c9f22cfade4fd9; version=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <9bbab2843f2d1337a268499a1c02b435d2985a17; version=acfdd18591eaac25446e976a0c0d190f8b3dbfb1 <b37d3ccbd549494890672136a0e623eb010d46a7

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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

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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-667Improper Locking

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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