PT-2021-8253 · Linux+4 · Linux Kernel+4

Peter Ujfalusi · Published 2021-07-13 · Updated 2024-12-23 · CVE-2021-47287

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 The issue is related to a memory leak in the Linux kernel when the driver register() function fails. This memory leak occurs because the memory allocated for auxdrv->driver.name is not freed before returning from auxiliary driver register(). The exploitation of this issue may allow an attacker to cause a denial of service.

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

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

ALSA-2024:7000

ALSA-2024:7001

BDU:2025-00791

CESA-2024_7000

CESA-2024_7001

CVE-2021-47287

INFSA-2024_7000

INFSA-2024_7001

RHSA-2024:7000

RHSA-2024:7001

RHSA-2024_7000

RHSA-2024_7001

RLSA-2024:7001

Affected Products

Almalinux

Centos

Linux Kernel

Red Hat

Rocky Linux

References · 439

• https://nvd.nist.gov/vuln/detail/CVE-2021-47287 · Security Note
• https://ubuntu.com/security/CVE-2021-47287 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47287 · Security Note
• https://git.kernel.org/stable/c/4afa0c22eed33cfe0c590742387f0d16f32412f3 · Patch
• https://security-tracker.debian.org/tracker/CVE-2021-47287 · Vendor Advisory
• https://git.kernel.org/stable/c/ce5b3de58fc21303722df46551f7eb9a91afb409 · Patch
• https://errata.rockylinux.org/RLSA-2024:7000 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2024:7000 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2024:7001 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-00791 · Security Note
• https://errata.almalinux.org/8/ALSA-2024-7001.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47287 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2024:7001 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2024-7000.html · Vendor Advisory