PT-2024-11067 · Linux · Linux Kernel

Trevor Hemsley · Published 2021-04-20 · Updated 2024-04-10 · CVE-2021-46949

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 the TX queue lookup in TX flush done handling in the Linux kernel. Specifically, the problem arises because the code starts from a TXQ instance number ('qid'), not a TXQ type, making the efx get tx queue() function inappropriate and potentially leading to NULL returns and panics.

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-02872

CVE-2021-46949

Affected Products

Linux Kernel

References · 23

• https://git.kernel.org/stable/c/fb791572d6747ef385f628450f8d57cd132e6e5a · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46949 · Vendor Advisory
• https://git.kernel.org/stable/c/98d91180748986bfb6dfb3e72765f3225719a647 · Patch
• https://osv.dev/vulnerability/CVE-2021-46949 · Vendor Advisory
• https://git.kernel.org/stable/c/a1570985ec04116cc665b760faf666a104154170 · Patch
• https://git.kernel.org/stable/c/5b1faa92289b53cad654123ed2bc8e10f6ddd4ac · Patch
• https://bdu.fstec.ru/vul/2025-02872 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-46949 · Security Note
• https://ubuntu.com/security/CVE-2021-46949 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46949 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46949 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46949 · Vendor Advisory
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.36 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3 · Note
• https://lore.kernel.org/linux-cve-announce/[e-mail]/T/#u · Note