PT-2025-7957 · Linux+4 · Linux Kernel+4

Holger Hoffstätte · Published 2022-03-08 · Updated 2025-05-21 · CVE-2021-47646

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A crash was triggered in conjunction with a specific commit in the Linux kernel. The issue was related to a Use-After-Free (UAF) bug introduced by a different commit. The UAF bug has been fixed by a subsequent commit.

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

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2025-04433

CVE-2021-47646

RHSA-2022:8267

RHSA-2022_8267

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1241-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Red Os

Suse

References · 1342

• https://git.kernel.org/stable/c/931aff627469a75c77b9fd3823146d0575afffd6 · Patch
• https://git.kernel.org/stable/c/15729ff8143f8135b03988a100a19e66d7cb7ecd · Patch
• https://osv.dev/vulnerability/CVE-2021-47646 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://git.kernel.org/stable/c/abc2129e646af7b43025d90a071f83043f1ae76c · Patch
• https://git.kernel.org/stable/c/cc051f497eac9d8a0d816cd4bffa3415f2724871 · Patch
• https://git.kernel.org/stable/c/f990f0985eda59d4f29fc83fcf300c92b1225d39 · Patch
• https://git.kernel.org/stable/c/4083925bd6dc89216d156474a8076feec904e607 · Patch
• https://bdu.fstec.ru/vul/2025-04433 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-47646 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://git.kernel.org/stable/c/65d8a737452e88f251fe5d925371de6d606df613 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47646 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory