CVE-2024-42244

Kernel crash via mismatched mos7840 URB context

Published Aug 7, 2024 · Updated May 11, 2026

Denial of service in Linux allows local users to crash the kernel by resuming an open mos7840 USB serial port on affected versions. The mos7840 resume path submits two read URBs, but the second retains a USB-serial-core context pointer instead of the required mos7840 port structure. Triggering the fault requires an attached compatible multiport USB serial adapter, an open port, and a suspend-resume cycle; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux allows local users to crash the kernel by resuming an open mos7840 USB serial port on affected versions. The mos7840 resume path submits two read URBs, but the second retains a USB-serial-core context pointer instead of the required mos7840 port structure. Triggering the fault requires an attached compatible multiport USB serial adapter, an open port, and a suspend-resume cycle; the bounded consequence is a kernel crash.

The record

CVE
CVE-2024-42244
Published
Aug 7, 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. Aug 7, 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=3.3
  2. Affected versionversion=d83b405383c965498923f3561c3321e2b5df5727 <1094ed500987e67a9d18b0f95e1812f1cc720856
  3. Affected versionversion=d83b405383c965498923f3561c3321e2b5df5727 <553e67dec846323b5575e78a776cf594c13f98c4
  4. Affected versionversion=d83b405383c965498923f3561c3321e2b5df5727 <5ae6a64f18211851c8df6b4221381c438b9a7348
  5. Affected versionversion=d83b405383c965498923f3561c3321e2b5df5727 <932a86a711c722b45ed47ba2103adca34d225b33
  6. Affected versionversion=d83b405383c965498923f3561c3321e2b5df5727 <b14aa5673e0a8077ff4b74f0bb260735e7d5e6a4
  7. Affected versionversion=d83b405383c965498923f3561c3321e2b5df5727 <c15a688e49987385baa8804bf65d570e362f8576

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=d83b405383c965498923f3561c3321e2b5df5727 <1094ed500987e67a9d18b0f95e1812f1cc720856; version=d83b405383c965498923f3561c3321e2b5df5727 <553e67dec846323b5575e78a776cf594c13f98c4; version=d83b405383c965498923f3561c3321e2b5df5727 <5ae6a64f18211851c8df6b4221381c438b9a7348; version=d83b405383c965498923f3561c3321e2b5df5727 <932a86a711c722b45ed47ba2103adca34d225b33; version=d83b405383c965498923f3561c3321e2b5df5727 <b14aa5673e0a8077ff4b74f0bb260735e7d5e6a4; version=d83b405383c965498923f3561c3321e2b5df5727 <c15a688e49987385baa8804bf65d570e362f8576

Published CVSS scores

5.5NISTCVSS: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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