CVE-2023-52813

Kernel panic via incomplete PADATA_RESET request handling

Published May 21, 2024 · Updated May 11, 2026

A pcrypt concurrency flaw in affected Linux kernels allows local users to trigger a kernel hang and panic during AEAD self-tests. When PADATA_RESET is set, padata_do_parallel returns -EBUSY without invoking aead_request_complete, while test_aead_vec_cfg still waits for completion. Reaching the fault requires local low-privileged access and a concurrent padata reset; the resulting blocked cryptomgr_test task can panic the host.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A pcrypt concurrency flaw in affected Linux kernels allows local users to trigger a kernel hang and panic during AEAD self-tests. When PADATA_RESET is set, padata_do_parallel returns -EBUSY without invoking aead_request_complete, while test_aead_vec_cfg still waits for completion. Reaching the fault requires local low-privileged access and a concurrent padata reset; the resulting blocked cryptomgr_test task can panic the host.

The record

CVE
CVE-2023-52813
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE 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=16295bec6398a3eedc9377e1af6ff4c71b98c300 <039fec48e062504f14845124a1a25eb199b2ddc0
  2. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <372636debe852913529b1716f44addd94fff2d28
  3. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <546c1796ad1ed0d87dab3c4b5156d75819be2316
  4. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <8f4f68e788c3a7a696546291258bfa5fdb215523
  5. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <c55fc098fd9d2dca475b82d00ffbcaf97879d77e
  6. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <c9c1334697301c10e6918d747ed38abfbc0c96e7
  7. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <e134f3aba98e6c801a693f540912c2d493718ddf
  8. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <e97bf4ada7dddacd184c3e196bd063b0dc71b41d
  9. Affected versionversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <fb2d3a50a8f29a3c66682bb426144f40e32ab818
  10. Affected versionversion=2.6.34

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=16295bec6398a3eedc9377e1af6ff4c71b98c300 <039fec48e062504f14845124a1a25eb199b2ddc0; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <372636debe852913529b1716f44addd94fff2d28; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <546c1796ad1ed0d87dab3c4b5156d75819be2316; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <8f4f68e788c3a7a696546291258bfa5fdb215523; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <c55fc098fd9d2dca475b82d00ffbcaf97879d77e; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <c9c1334697301c10e6918d747ed38abfbc0c96e7; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <e134f3aba98e6c801a693f540912c2d493718ddf; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <e97bf4ada7dddacd184c3e196bd063b0dc71b41d; version=16295bec6398a3eedc9377e1af6ff4c71b98c300 <fb2d3a50a8f29a3c66682bb426144f40e32ab818; version=2.6.34

Published CVSS scores

5.5UbuntuCVSS: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 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

T1499.004Application or System Exploitation

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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