CVE-2022-50819

Kernel crash via stale scatter-gather table pointer

Published Dec 30, 2025 · Updated Dec 30, 2025

Invalid pointer dereference in Linux kernel udmabuf allows local users to crash the system after scatter-gather table creation fails. The failed mapping path leaves ubuf->sg pointing to an invalid scatter-gather table, which release_udmabuf later passes to the unmap and free path. Triggering the crash requires local access to create and map a udmabuf plus an allocation failure such as out-of-memory; the reported consequence is a kernel crash.

CVSS severityUnavailable
Unscored
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

Invalid pointer dereference in Linux kernel udmabuf allows local users to crash the system after scatter-gather table creation fails. The failed mapping path leaves ubuf->sg pointing to an invalid scatter-gather table, which release_udmabuf later passes to the unmap and free path. Triggering the crash requires local access to create and map a udmabuf plus an allocation failure such as out-of-memory; the reported consequence is a kernel crash.

The record

CVE
CVE-2022-50819
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9861e43f097a50678041f973347b3a88f2da09cf
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bbe2f6f90310b3a0b5de4e0dc022b36faabfd718
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d9c04a1b7a15b5e74b2977461d9511e497f05d8f
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dfbed8c92eb853929f4fa676ba493391dab47be4
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fc285549f454c0f50f87ec945fc0bf44719c0fa4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9861e43f097a50678041f973347b3a88f2da09cf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bbe2f6f90310b3a0b5de4e0dc022b36faabfd718; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d9c04a1b7a15b5e74b2977461d9511e497f05d8f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dfbed8c92eb853929f4fa676ba493391dab47be4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fc285549f454c0f50f87ec945fc0bf44719c0fa4

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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