PT-2024-11142 · Linux · Linux Kernel

Published 2021-04-09 · Updated 2024-12-09 · CVE-2021-47052

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 memory leak issue has been identified in the Linux kernel, specifically in the crypto: sa2ul component. The problem arises from two error return paths that fail to free the rxd resource, resulting in memory leaks. This issue has been addressed by fixing these error return paths to properly free the rxd resource.

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

BDU:2025-07260

CVE-2021-47052

Affected Products

Linux Kernel

References · 23

• https://git.kernel.org/stable/c/b7bd0657c2036add71981d88a7fae50188150b6e · Patch
• https://ubuntu.com/security/CVE-2021-47052 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47052 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47052 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47052 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47052 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-47052 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-07260 · Security Note
• https://git.kernel.org/stable/c/854b7737199848a91f6adfa0a03cf6f0c46c86e8 · Patch
• https://git.kernel.org/stable/c/0e596b3734649041ed77edc86a23c0442bbe062b · Patch
• https://git.kernel.org/stable/c/dfd6443bf49ac17adf882ca46c40c506a0284bd6 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47052 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2024022841-CVE-2021-47052-3cca@gregkh · Note
• https://lore.kernel.org/linux-cve-announce/2024022841-CVE-2021-47052-3cca@gregkh/T/#u · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21 · Note