PT-2021-8129 · Linux+1 · Linux Kernel+1

Sangwoo Bae · Published 2021-12-25 · Updated 2025-01-16 · CVE-2021-47088

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/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 The issue is related to the dbgfs component of the Linux kernel and is caused by incorrect locking. This can lead to a use after free bug when the monitoring targets are destroyed without holding the corresponding lock. The vulnerability can be exploited 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.

Improper Locking

Use After Free

Weakness Enumeration

CWE-667

CWE-416

Related Identifiers

BDU:2024-08386

CVE-2021-47088

Affected Products

Linux Kernel

Red Os

References · 17

• https://ubuntu.com/security/CVE-2021-47088 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47088 · Security Note
• https://git.kernel.org/stable/c/330c6117a82c16a9a365a51cec5c9ab30b13245c · Patch
• https://bdu.fstec.ru/vul/2024-08386 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47088 · Security Note
• https://git.kernel.org/stable/c/34796417964b8d0aef45a99cf6c2d20cebe33733 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47088 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47088 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47088 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47088 · Vendor Advisory
• https://git.kernel.org/linus/34796417964b8d0aef45a99cf6c2d20cebe33733 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-kernel-lt-11-10-24-1 · Note
• https://redos.red-soft.ru/support/secure · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.12 · Note
• https://lore.kernel.org/linux-cve-announce/2024030413-CVE-2021-47088-269c@gregkh/T/#u · Note