CVE-2022-49273

System crash via premature RTC feature access

Published Feb 26, 2025 · Updated May 11, 2026

NULL pointer dereference in affected Linux kernel branches from 5.12 allows local users to crash the system during PL031 RTC probing. In pl031_probe(), the no-interrupt path clears RTC_FEATURE_ALARM through ldata->rtc before devm_rtc_allocate_device() assigns that pointer. The condition requires a PL031 RTC device with no interrupt line; reaching the probe path dereferences NULL and can stop the host without exposing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux kernel branches from 5.12 allows local users to crash the system during PL031 RTC probing. In pl031_probe(), the no-interrupt path clears RTC_FEATURE_ALARM through ldata->rtc before devm_rtc_allocate_device() assigns that pointer. The condition requires a PL031 RTC device with no interrupt line; reaching the probe path dereferences NULL and can stop the host without exposing or modifying data.

The record

CVE
CVE-2022-49273
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=5.12
  2. Affected versionversion=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <1b915703964f7e636961df04c540261dc55c6c70
  3. Affected versionversion=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <cd2722e411e8ab7e5ae41102f6925fa13dffdac5
  4. Affected versionversion=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <d274ce4a3dfd0b9a292667535578359b865765cb
  5. Affected versionversion=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <ea6af39f3da50c86367a71eb3cc674ade3ed244c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <1b915703964f7e636961df04c540261dc55c6c70; version=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <cd2722e411e8ab7e5ae41102f6925fa13dffdac5; version=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <d274ce4a3dfd0b9a292667535578359b865765cb; version=d9b0dd54a1943f47a381a474f8ea2c94466110c0 <ea6af39f3da50c86367a71eb3cc674ade3ed244c

Published CVSS scores

5.5CISA-ADPCVSS: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

CWE-476NULL Pointer Dereference
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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