CVE-2022-50317

Kernel crash via uninitialized bridge removal

Published Sep 15, 2025 · Updated Sep 15, 2025

NULL pointer dereference in Linux's MegaChips bridge driver allows local users to crash the kernel during driver removal. The stdp4028_ge_b850v3_fw_remove path calls drm_bridge_remove for an object left uninitialized when stdp2690 and stdp4028 do not probe together. Reaching the fault requires the affected bridge configuration and execution of the driver-removal path; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.16%
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 Linux's MegaChips bridge driver allows local users to crash the kernel during driver removal. The stdp4028_ge_b850v3_fw_remove path calls drm_bridge_remove for an object left uninitialized when stdp2690 and stdp4028 do not probe together. Reaching the fault requires the affected bridge configuration and execution of the driver-removal path; the bounded consequence is a kernel crash.

The record

CVE
CVE-2022-50317
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=11632d4aa2b3f126790e81a4415d6c23103cf8bb <1ff673333d46d2c1b053ebd0c1c7c7c79e36943e
  2. Affected versionversion=11632d4aa2b3f126790e81a4415d6c23103cf8bb <21764467ab396d9f08921e0a5ffa1214244e1ad9
  3. Affected versionversion=11632d4aa2b3f126790e81a4415d6c23103cf8bb <7371fad5cfe6eada6bb5523c895fd6074b15c2b9
  4. Affected versionversion=16e3827904932eccfba0915f0c93b519de3536ac <5bc20bafcd87ba0858ab772cefc7047cb51bc249
  5. Affected versionversion=405856460d3e7aefb7c1aef047ec88fc4ef2e2a5 <4610e7a4111fa3f3ce27c09d6d94008c55f1cd31
  6. Affected versionversion=50ad94f8654a53ec9ca3604a7a23cbaf166e0119 <1daf69228e310938177119c4eadcd30fc75c81e0
  7. Affected versionversion=5.17
  8. Affected versionversion=7649972d97fb98578fbc4a351416cf72895e7c4d <aaa512ad1e59f2edf8a9e4f2b167a44b24670679
  9. Affected versionversion=b8d10f601f226f055df8b5368d7ea7f369136cd5 <877e92e9b1bdeb580b31a46061005936be902cd4
  10. Affected versionversion=e449461989f0674f188d30494ffd3f5ba74c1a05

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=11632d4aa2b3f126790e81a4415d6c23103cf8bb <1ff673333d46d2c1b053ebd0c1c7c7c79e36943e; version=11632d4aa2b3f126790e81a4415d6c23103cf8bb <21764467ab396d9f08921e0a5ffa1214244e1ad9; version=11632d4aa2b3f126790e81a4415d6c23103cf8bb <7371fad5cfe6eada6bb5523c895fd6074b15c2b9; version=16e3827904932eccfba0915f0c93b519de3536ac <5bc20bafcd87ba0858ab772cefc7047cb51bc249; version=405856460d3e7aefb7c1aef047ec88fc4ef2e2a5 <4610e7a4111fa3f3ce27c09d6d94008c55f1cd31; version=50ad94f8654a53ec9ca3604a7a23cbaf166e0119 <1daf69228e310938177119c4eadcd30fc75c81e0; version=5.17; version=7649972d97fb98578fbc4a351416cf72895e7c4d <aaa512ad1e59f2edf8a9e4f2b167a44b24670679; version=b8d10f601f226f055df8b5368d7ea7f369136cd5 <877e92e9b1bdeb580b31a46061005936be902cd4; version=e449461989f0674f188d30494ffd3f5ba74c1a05

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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
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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