PT-2024-11240 · Linux+1 · Linux Kernel+1

Published 2021-06-16 · Updated 2024-07-03 · CVE-2021-47232

Positive Technologies (AI Summary)

CVSS v3.1

8.4

High

Base vector

AV:L/AC:L/PR:N/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 a Use-after-Free problem in the Linux kernel, specifically in the can: j1939 module. The problem occurs when a skb is taken from the per-session skb queue without incrementing the ref count, leading to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS. This issue was found by the syzbot.

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:2025-07312

CVE-2021-47232

OESA-2024-1767

Affected Products

Astra Linux

Linux Kernel

References · 55

• https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47565 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47500 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-52670 · Security Note
• https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2024-38541 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-36894 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47252 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47232 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47434 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-36950 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47521 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-38588 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-36971 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47493 · Security Note