PT-2021-7996 · Linux · Linux Kernel

Victor Lu · Published 2021-03-23 · Updated 2024-12-06 · CVE-2021-47042

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 dc link construct() function, which can be exploited by a remote attacker to cause a denial of service. The vulnerability is due to the incorrect freeing of local data after use, leading to an unreferenced object. The backtrace of the issue involves several functions, including kmem cache alloc trace(), link create(), and dc create(). There is no information about the estimated number of potentially affected devices or 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.

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2024-01684

CVE-2021-47042

Affected Products

Linux Kernel

References · 16

• https://git.kernel.org/stable/c/616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1 · Patch
• https://bdu.fstec.ru/vul/2024-01684 · Security Note
• https://ubuntu.com/security/CVE-2021-47042 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47042 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47042 · Security Note
• https://git.kernel.org/stable/c/296443139f893b554dddd56a99ba8471ab5802d4 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47042 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47042 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47042 · Vendor Advisory
• https://vuldb.com/ru/?id.255083 · Note
• https://twitter.com/CVEnew/status/1762754386537988353 · Twitter Post
• https://lore.kernel.org/linux-cve-announce/2024022838-CVE-2021-47042-142d@gregkh/T/#u · Note
• https://git.kernel.org/linus/616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1 · Note
• https://lore.kernel.org/linux-cve-announce/2024022838-CVE-2021-47042-142d@gregkh · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 · Note