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CVE-2022-50390

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/ttm: fix undefined behavior in bit shift for TTM_TT_FLAG_PRIV_POPULATED Shifting signed 32-bit value by 31 bits is undefine…

Published Sep 18, 2025EPSS 0.17%

Overview

CVE-2022-50390 is a medium-severity vulnerability. It was published on September 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/ttm: fix undefined behavior in bit shift for TTM_TT_FLAG_PRIV_POPULATED

Shifting signed 32-bit value by 31 bits is undefined, so changing

significant bit to unsigned. The UBSAN warning calltrace like below:

UBSAN: shift-out-of-bounds in ./include/drm/ttm/ttm_tt.h:122:26

left shift of 1 by 31 places cannot be represented in type 'int'

Call Trace:

<TASK>

dump_stack_lvl+0x7d/0xa5

dump_stack+0x15/0x1b

ubsan_epilogue+0xe/0x4e

__ubsan_handle_shift_out_of_bounds+0x1e7/0x20c

ttm_bo_move_memcpy+0x3b4/0x460 [ttm]

bo_driver_move+0x32/0x40 [drm_vram_helper]

ttm_bo_handle_move_mem+0x118/0x200 [ttm]

ttm_bo_validate+0xfa/0x220 [ttm]

drm_gem_vram_pin_locked+0x70/0x1b0 [drm_vram_helper]

drm_gem_vram_pin+0x48/0xb0 [drm_vram_helper]

drm_gem_vram_plane_helper_prepare_fb+0x53/0xe0 [drm_vram_helper]

drm_gem_vram_simple_display_pipe_prepare_fb+0x26/0x30 [drm_vram_helper]

drm_simple_kms_plane_prepare_fb+0x4d/0xe0 [drm_kms

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/2ff0309b73d86e8591881ac035af06e01c112e89Refgit.kernel.org/stable/c/387659939c00156f8d6bab0fbc55b4eaf2b6bc5bRefgit.kernel.org/stable/c/6528971fdce0dfc0a28fec42c151a1eccdabadf5Refgit.kernel.org/stable/c/c4079a34c0adef9f35a16783fb13a9084406f96d

How CyberStrike helps

Frequently asked questions

What is CVE-2022-50390?

CVE-2022-50390 is a medium-severity vulnerability. It was published on September 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50390?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-50390?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-50390?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-50390 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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