PT-2024-11444 · Linux+2 · Linux Kernel+2

Published 2021-10-12 · Updated 2024-08-08 · CVE-2021-47449

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.15.0-rc4+

Description The issue is related to a lock added around the Tx timestamp tracker flow in the Linux kernel, which can lead to a deadlock if a mutex actually sleeps. This lock is problematic because it is being held around a call to ice clear phy tstamp(), a function that takes a mutex to send a PHY write command to firmware. The deadlock can cause a warning on a kernel with preemption debugging enabled.

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

Improper Validation of Array Index

Improper Locking

Weakness Enumeration

CWE-129

CWE-667

Related Identifiers

BDU:2025-07495

CVE-2021-47449

OPENSUSE-SU-2024_2189-1

SUSE-SU-2024:2008-1

SUSE-SU-2024:2011-1

SUSE-SU-2024:2019-1

SUSE-SU-2024:2189-1

SUSE-SU-2024:2190-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 1244

• https://git.kernel.org/stable/c/61616be899975404df44c20ab902464b60882cd7 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:2019-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47449 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2190-1 · Vendor Advisory
• https://git.kernel.org/stable/c/4d4a223a86afe658cd878800f09458e8bb54415d · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:2008-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47449 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47449 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47449 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47449 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47449 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2189-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47449 · Security Note
• https://bdu.fstec.ru/vul/2025-07495 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:2011-1 · Vendor Advisory