CVE-2022-50261

Local kernel panic via mismatched mode callbacks

Published Sep 15, 2025 · Updated Sep 15, 2025

A callback type mismatch in the Linux kernel STi DRM drivers allows local users to crash kCFI-enabled systems through display mode handling. The sti_dvo, sti_hda, and sti_hdmi mode_valid callbacks return int even though drm_connector_helper_funcs requires enum drm_mode_status, so kCFI rejects the indirect call target. Exploitation requires a Clang kCFI kernel with the relevant STi display driver and connector path in use; the bounded consequence is a kernel panic or termination of the calling thread.

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

A callback type mismatch in the Linux kernel STi DRM drivers allows local users to crash kCFI-enabled systems through display mode handling. The sti_dvo, sti_hda, and sti_hdmi mode_valid callbacks return int even though drm_connector_helper_funcs requires enum drm_mode_status, so kCFI rejects the indirect call target. Exploitation requires a Clang kCFI kernel with the relevant STi display driver and connector path in use; the bounded consequence is a kernel panic or termination of the calling thread.

The record

CVE
CVE-2022-50261
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <04371a75a58422a301a9ff9ae3babd310ac3bb3f
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ad811cc08a937d875cbad0149c1bab17f84ba05
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <511b48ee8e4aec2d03d2af06b363d9eb3230b017
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e3c4d3fa5d458d685561ecbaf8daa9dba14979e
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f9941dea3a70b73f2063f9dcc4aaae6af03c5ba
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a075c21ee026f4a74f9fce5928ea3c8d18a8af13
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2c92b2a3801b09b709cbefd9a9e4944b72400bf
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b4307c7d35e346b909edfdc1f280902150570bb6
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e578b0906b6a81479cd5b5b6c848a7096addf5e9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <04371a75a58422a301a9ff9ae3babd310ac3bb3f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0ad811cc08a937d875cbad0149c1bab17f84ba05; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <511b48ee8e4aec2d03d2af06b363d9eb3230b017; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6e3c4d3fa5d458d685561ecbaf8daa9dba14979e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f9941dea3a70b73f2063f9dcc4aaae6af03c5ba; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a075c21ee026f4a74f9fce5928ea3c8d18a8af13; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2c92b2a3801b09b709cbefd9a9e4944b72400bf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b4307c7d35e346b909edfdc1f280902150570bb6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e578b0906b6a81479cd5b5b6c848a7096addf5e9

Published CVSS scores

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

T1499Endpoint Denial of Service

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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