PT-2024-11078 · Linux+1 · Linux Kernel+1

Published 2021-03-10 · Updated 2025-01-08 · CVE-2021-46969

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/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 mhi queue function in the Linux kernel, which returns an error when the doorbell is not accessible in the current state. This can occur when the device is in a non-M0 state, such as M3, and needs to be woken up prior to ringing the doorbell. The error is not actually an error, but rather a delay in the doorbell update. The issue also fixes a use-after-free error for the skb case, where a caller queuing skb will try to free the skb if the queueing fails, but in that case, the queueing has already been done.

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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2025-02852

CVE-2021-46969

Affected Products

Astra Linux

Linux Kernel

References · 14

• https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3 · Patch
• https://osv.dev/vulnerability/CVE-2021-46969 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46969 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-46969 · Security Note
• https://bdu.fstec.ru/vul/2025-02852 · Security Note
• https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-46969 · Security Note
• https://ubuntu.com/security/CVE-2021-46969 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46969 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2024022720-CVE-2021-46969-3263@gregkh · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3 · Note
• https://twitter.com/CVEnew/status/1762551297318776893 · Twitter Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46969 · Note
• https://lore.kernel.org/linux-cve-announce/2024022720-CVE-2021-46969-3263@gregkh/T/#u · Note