CVE-2023-53587

Kernel crash via unsynchronized ring-buffer teardown

Published Oct 4, 2025 · Updated Oct 4, 2025

Use-after-free in the Linux kernel ring buffer from 3.10 allows local users to crash the kernel during buffer teardown. The teardown path in kernel/trace/ring_buffer.c frees per-CPU buffers without synchronizing pending IRQ work, which later reads freed memory. Triggering requires data to be written immediately before destruction and winning the IRQ-work race; the CNA reproduced it under User-Mode Linux time-travel and did not establish practical exploitation on a conventional system.

CVSS severity7.8
High
EPSS probability0.16%
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 the Linux kernel ring buffer from 3.10 allows local users to crash the kernel during buffer teardown. The teardown path in kernel/trace/ring_buffer.c frees per-CPU buffers without synchronizing pending IRQ work, which later reads freed memory. Triggering requires data to be written immediately before destruction and winning the IRQ-work race; the CNA reproduced it under User-Mode Linux time-travel and did not establish practical exploitation on a conventional system.

The record

CVE
CVE-2023-53587
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 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=15693458c4bc0693fd63a50d60f35b628fcf4e29 <0a65165bd24ee9231191597b7c232376fcd70cdb
  2. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <1c99f65d6af2a454bfd5207b4f6a97c8474a1191
  3. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <2399b1fda025e939b6fb1ac94505bcf718534e65
  4. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <2702b67f59d455072a08dc40312f9b090d4dec04
  5. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <372c5ee537b8366b64b691ba29e9335525e1655e
  6. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <675751bb20634f981498c7d66161584080cc061e
  7. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <c63741e872fcfb10e153517750f7908f0c00f60d
  8. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <d9834abd8b24d1fe8092859e436fe1e0fd467c61
  9. Affected versionversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <fc6858b7f8e1221f62ce8c6ff8a13a349c32cd76
  10. Affected versionversion=3.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=15693458c4bc0693fd63a50d60f35b628fcf4e29 <0a65165bd24ee9231191597b7c232376fcd70cdb; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <1c99f65d6af2a454bfd5207b4f6a97c8474a1191; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <2399b1fda025e939b6fb1ac94505bcf718534e65; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <2702b67f59d455072a08dc40312f9b090d4dec04; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <372c5ee537b8366b64b691ba29e9335525e1655e; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <675751bb20634f981498c7d66161584080cc061e; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <c63741e872fcfb10e153517750f7908f0c00f60d; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <d9834abd8b24d1fe8092859e436fe1e0fd467c61; version=15693458c4bc0693fd63a50d60f35b628fcf4e29 <fc6858b7f8e1221f62ce8c6ff8a13a349c32cd76; version=3.10

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/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

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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

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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