CVEvulnerability

CVE-2021-47232

9.8 CRITICAL Published 2024-05-21 Modified 2026-08-04 Official page ↗
Status
Modified
Published
2024-05-21
Last modified
2026-08-04
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
8.4 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.

Affected configurations

• linux linux kernel (>= 5.4 < 5.4.128) • linux linux kernel (>= 5.5 < 5.10.46) • linux linux kernel (>= 5.11 < 5.12.13) • linux linux kernel 5.13

Related

Weakness · CWE (1)

References