CVE-2023-52791

Local service interruption via non-atomic I2C transfer

Published May 21, 2024 · Updated May 11, 2026

Availability failure in affected Linux kernel releases allows local users to disrupt emergency restart on systems using an I2C restart device. The I2C core in drivers/i2c/i2c-core.h selects a non-atomic transfer when interrupts remain enabled even though preemption is disabled, then waits for DMA completion in a context that cannot schedule. Reachability requires low-privileged local access, a kernel panic, and an I2C-backed restart path; the invalid blocking wait disrupts restart completion.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Availability failure in affected Linux kernel releases allows local users to disrupt emergency restart on systems using an I2C restart device. The I2C core in drivers/i2c/i2c-core.h selects a non-atomic transfer when interrupts remain enabled even though preemption is disabled, then waits for DMA completion in a context that cannot schedule. Reachability requires low-privileged local access, a kernel panic, and an I2C-backed restart path; the invalid blocking wait disrupts restart completion.

The record

CVE
CVE-2023-52791
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=5.2
  2. Affected versionversion=bae1d3a05a8b99bd748168bbf8155a1d047c562e <185f3617adc8fe45e40489b458f03911f0dec46c
  3. Affected versionversion=bae1d3a05a8b99bd748168bbf8155a1d047c562e <25284c46b657f48c0f3880a2e0706c70d81182c0
  4. Affected versionversion=bae1d3a05a8b99bd748168bbf8155a1d047c562e <25eb381a736e7ae39a4245ef5c96484eb1073809
  5. Affected versionversion=bae1d3a05a8b99bd748168bbf8155a1d047c562e <3473cf43b9068b9dfef2f545f833f33c6a544b91
  6. Affected versionversion=bae1d3a05a8b99bd748168bbf8155a1d047c562e <8c3fa52a46ff4d208cefb1a462ec94e0043a91e1
  7. Affected versionversion=bae1d3a05a8b99bd748168bbf8155a1d047c562e <aa49c90894d06e18a1ee7c095edbd2f37c232d02
  8. Affected versionversion=bae1d3a05a8b99bd748168bbf8155a1d047c562e <f6237afabc349c1c7909db00e15d2816519e0d2b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=bae1d3a05a8b99bd748168bbf8155a1d047c562e <185f3617adc8fe45e40489b458f03911f0dec46c; version=bae1d3a05a8b99bd748168bbf8155a1d047c562e <25284c46b657f48c0f3880a2e0706c70d81182c0; version=bae1d3a05a8b99bd748168bbf8155a1d047c562e <25eb381a736e7ae39a4245ef5c96484eb1073809; version=bae1d3a05a8b99bd748168bbf8155a1d047c562e <3473cf43b9068b9dfef2f545f833f33c6a544b91; version=bae1d3a05a8b99bd748168bbf8155a1d047c562e <8c3fa52a46ff4d208cefb1a462ec94e0043a91e1; version=bae1d3a05a8b99bd748168bbf8155a1d047c562e <aa49c90894d06e18a1ee7c095edbd2f37c232d02; version=bae1d3a05a8b99bd748168bbf8155a1d047c562e <f6237afabc349c1c7909db00e15d2816519e0d2b

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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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