CVE-2021-47186

MEDIUM

Linux Kernel - Null Pointer Dereference in TIPC Crypto Key Handling

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup can return a null pointer so need to check for it, otherwise the null key will be dereferenced later in tipc_crypto_key_xmit as can be seen in the trace [1]. [1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

References (3)

Core 3

Core References

Patch

https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9

Patch

https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10

Patch

https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916

Scores

CVSS v3 5.5

EPSS 0.0022

EPSS Percentile 12.7%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (10)

Linux/Linux < 5.10

Linux/Linux 1ef6f7c9390ff5308c940ff8d0a53533a4673ad9 - 3e6db079751afd527bf3db32314ae938dc571916

Linux/Linux 1ef6f7c9390ff5308c940ff8d0a53533a4673ad9 - 9404c4145542c23019a80ab1bb2ecf73cd057b10

Linux/Linux 1ef6f7c9390ff5308c940ff8d0a53533a4673ad9 - a7d91625863d4ffed63b993b5e6dc1298b6430c9

Linux/Linux 5.10

Linux/Linux 5.10.82 - 5.10.*

Linux/Linux 5.15.5 - 5.15.*

Linux/Linux 5.16

linux/linux_kernel 5.16 rc1

linux/linux_kernel 5.5 - 5.10.82

Published Apr 10, 2024

Tracked Since Feb 18, 2026