CVE-2026-72424

Local system crash via probe-time IRQ race

Published Aug 15, 2026 · Updated Aug 15, 2026

NULL pointer dereference in the Linux msc313 RTC driver from 5.16 allows local users to crash the system during device probing. The shared IRQ handler calls dev_get_drvdata() before platform_set_drvdata() has stored the private data, then dereferences the NULL priv->rtc_base pointer. Triggering requires another device on the shared IRQ line to fire during the narrow probe-time initialization window; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.17%
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 the Linux msc313 RTC driver from 5.16 allows local users to crash the system during device probing. The shared IRQ handler calls dev_get_drvdata() before platform_set_drvdata() has stored the private data, then dereferences the NULL priv->rtc_base pointer. Triggering requires another device on the shared IRQ line to fire during the narrow probe-time initialization window; the bounded consequence is a kernel crash.

The record

CVE
CVE-2026-72424
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.16
  2. Affected versionversion=be7d9c9161b9c76edeff15e79edc2f256568fe05 <1f6a4aec0d36647eb2f67cd69db22bd28cabe2cb
  3. Affected versionversion=be7d9c9161b9c76edeff15e79edc2f256568fe05 <52c73b6992b46ed476590ed526faa033d4fbfc5d
  4. Affected versionversion=be7d9c9161b9c76edeff15e79edc2f256568fe05 <a369f48be8de426a7d2bca18dbd46c2ad1138803
  5. Affected versionversion=be7d9c9161b9c76edeff15e79edc2f256568fe05 <bb3e624808c981fe881cb79037be63e680ed7d38
  6. Affected versionversion=be7d9c9161b9c76edeff15e79edc2f256568fe05 <bc1f61a9b97d65de21c2681bcf0b5b1392c58486
  7. Affected versionversion=be7d9c9161b9c76edeff15e79edc2f256568fe05 <ece7b9ffde23e2ccd7567761ac27463ded43932c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=be7d9c9161b9c76edeff15e79edc2f256568fe05 <1f6a4aec0d36647eb2f67cd69db22bd28cabe2cb; version=be7d9c9161b9c76edeff15e79edc2f256568fe05 <52c73b6992b46ed476590ed526faa033d4fbfc5d; version=be7d9c9161b9c76edeff15e79edc2f256568fe05 <a369f48be8de426a7d2bca18dbd46c2ad1138803; version=be7d9c9161b9c76edeff15e79edc2f256568fe05 <bb3e624808c981fe881cb79037be63e680ed7d38; version=be7d9c9161b9c76edeff15e79edc2f256568fe05 <bc1f61a9b97d65de21c2681bcf0b5b1392c58486; version=be7d9c9161b9c76edeff15e79edc2f256568fe05 <ece7b9ffde23e2ccd7567761ac27463ded43932c

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/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.

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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