PT-2024-11191 · Linux+3 · Linux Kernel+3

Xinhui Pan · Published 2021-05-19 · Updated 2026-04-02 · CVE-2021-47142

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free vulnerability has been resolved in the Linux kernel, specifically in the drm/amdgpu component. The issue occurs when the ttm->sg variable is not set to NULL, leading to a general protection fault. The vulnerability is related to the sg free table function and the amdgpu ttm backend unbind and amdgpu ttm backend destroy functions. The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2025-07354

CVE-2021-47142

OESA-2024-1483

OESA-2024-1484

OPENSUSE-SU-2024_1489-1

SUSE-SU-2024:1454-1

SUSE-SU-2024:1465-1

SUSE-SU-2024:1489-1

SUSE-SU-2024:1643-1

SUSE-SU-2024:1646-1

SUSE-SU-2024:1870-1

USN-8143-1

USN-8143-2

Affected Products

Astra Linux

Linux Kernel

Suse

Ubuntu

References · 683

• 🔥 https://github.com/Kakashiiiiy/CVE-2021-29155 · Exploit
• 🔥 https://github.com/benschlueter/CVE-2021-29155 · Exploit
• https://ubuntu.com/security/CVE-2026-23060 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8143-2 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47142 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47143 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47142 · Security Note
• https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122 · Patch
• https://security-tracker.debian.org/tracker/CVE-2021-47142 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23074 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1646-1 · Vendor Advisory
• https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17 · Patch
• https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-52578 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-36783 · Security Note