CVE-2022-50261

MEDIUM EPSS 4.5%
Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: drm/sti: Fix return type of sti_{dvo,hda,hdmi}_connector_mode_valid() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. A proposed warning in clang aims to catch these at compile time, which reveals: drivers/gpu/drm/sti/sti_hda.c:637:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_connector *, struct drm_display_mode *)' with an expression of type 'int (struct drm_connector *, struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types-strict] .mode_valid = sti_hda_connector_mode_valid, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/sti/sti_dvo.c:376:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_connector *, struct drm_display_mode *)' with an expression of type 'int (struct drm_connector *, struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types-strict] .mode_valid = sti_dvo_connector_mode_valid, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/sti/sti_hdmi.c:1035:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_connector *, struct drm_display_mode *)' with an expression of type 'int (struct drm_connector *, struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types-strict] .mode_valid = sti_hdmi_connector_mode_valid, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ->mode_valid() in 'struct drm_connector_helper_funcs' expects a return type of 'enum drm_mode_status', not 'int'. Adjust the return type of sti_{dvo,hda,hdmi}_connector_mode_valid() to match the prototype's to resolve the warning and CFI failure.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel* <4.9.337
linuxlinux_kernel*≥4.10  –  <4.14.303
linuxlinux_kernel*≥4.15  –  <4.19.270
linuxlinux_kernel*≥4.20  –  <5.4.229
linuxlinux_kernel*≥5.5  –  <5.10.163
linuxlinux_kernel*≥5.11  –  <5.15.86
linuxlinux_kernel*≥5.16  –  <6.0.16
linuxlinux_kernel*≥6.1  –  <6.1.2

References 9

  • git.kernel.org https://git.kernel.org/stable/c/04371a75a58422a301a9ff9ae3babd310ac3bb3f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0ad811cc08a937d875cbad0149c1bab17f84ba05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/511b48ee8e4aec2d03d2af06b363d9eb3230b017
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6e3c4d3fa5d458d685561ecbaf8daa9dba14979e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f9941dea3a70b73f2063f9dcc4aaae6af03c5ba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a075c21ee026f4a74f9fce5928ea3c8d18a8af13
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2c92b2a3801b09b709cbefd9a9e4944b72400bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4307c7d35e346b909edfdc1f280902150570bb6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e578b0906b6a81479cd5b5b6c848a7096addf5e9
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/04371a75a58422a301a9ff9ae3babd310ac3bb3f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0ad811cc08a937d875cbad0149c1bab17f84ba05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/511b48ee8e4aec2d03d2af06b363d9eb3230b017
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6e3c4d3fa5d458d685561ecbaf8daa9dba14979e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f9941dea3a70b73f2063f9dcc4aaae6af03c5ba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a075c21ee026f4a74f9fce5928ea3c8d18a8af13
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2c92b2a3801b09b709cbefd9a9e4944b72400bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4307c7d35e346b909edfdc1f280902150570bb6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e578b0906b6a81479cd5b5b6c848a7096addf5e9
    Patch