CVE-2022-50142

Kernel crash via vmalloc-backed DMA buffer mapping

Published Jun 18, 2025 · Updated May 11, 2026

Memory-mapping flaw in affected Linux kernel releases allows local users to crash the kernel through an Intel Trace Hub MSU buffer mapping. The msc_mmap_fault path can receive a DMA buffer allocated through vmalloc but handles its address as ordinary directly mapped memory rather than translating the vmalloc page. Triggering the fault requires local access to map an Intel Trace Hub MSU buffer; the published failure trace demonstrates a kernel crash.

CVSS severity7.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory-mapping flaw in affected Linux kernel releases allows local users to crash the kernel through an Intel Trace Hub MSU buffer mapping. The msc_mmap_fault path can receive a DMA buffer allocated through vmalloc but handles its address as ordinary directly mapped memory rather than translating the vmalloc page. Triggering the fault requires local access to map an Intel Trace Hub MSU buffer; the published failure trace demonstrates a kernel crash.

The record

CVE
CVE-2022-50142
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=5.2
  2. Affected versionversion=ba39bd8306057fb343dfb75d93a76d824b625236 <0ed72c6bc632cbf8d979ac60f982ff84b7bb610a
  3. Affected versionversion=ba39bd8306057fb343dfb75d93a76d824b625236 <4914c50670b6a531e2cb17cd984cc565b4681312
  4. Affected versionversion=ba39bd8306057fb343dfb75d93a76d824b625236 <566887bad7ff2297d6b3f9659c702ba075f3d62d
  5. Affected versionversion=ba39bd8306057fb343dfb75d93a76d824b625236 <6ae2881c1d1fa0e33f4763b7c786f8ef05a9c828
  6. Affected versionversion=ba39bd8306057fb343dfb75d93a76d824b625236 <ac12ad3ccf6d386e64a9d6a890595a2509d24edd
  7. Affected versionversion=ba39bd8306057fb343dfb75d93a76d824b625236 <b5d924cb4c7b952eaa61622f14427723a78137a3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=ba39bd8306057fb343dfb75d93a76d824b625236 <0ed72c6bc632cbf8d979ac60f982ff84b7bb610a; version=ba39bd8306057fb343dfb75d93a76d824b625236 <4914c50670b6a531e2cb17cd984cc565b4681312; version=ba39bd8306057fb343dfb75d93a76d824b625236 <566887bad7ff2297d6b3f9659c702ba075f3d62d; version=ba39bd8306057fb343dfb75d93a76d824b625236 <6ae2881c1d1fa0e33f4763b7c786f8ef05a9c828; version=ba39bd8306057fb343dfb75d93a76d824b625236 <ac12ad3ccf6d386e64a9d6a890595a2509d24edd; version=ba39bd8306057fb343dfb75d93a76d824b625236 <b5d924cb4c7b952eaa61622f14427723a78137a3

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-787Out-of-bounds Write
T1499.004Application or System Exploitation

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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