PT-2021-8123 · Linux+3 · Linux Kernel+3

Mian Yousaf Kaukab + 1 · Published 2021-12-08 · Updated 2025-01-07 · CVE-2021-47095

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 vulnerability is related to the ipmi: ssif component in the Linux kernel. It causes a kernel crash when an error path is taken during the probe of ssif info->client. The issue arises because ssif info->client is dereferenced in the error path before some error checking has been done. To resolve this, ssif info->client should be initialized before any error path can be taken, and i2c client data should be cleared in the error path to prevent a dangling pointer from leaking.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-402

CWE-476

Related Identifiers

BDU:2024-08377

CVE-2021-47095

OPENSUSE-SU-2024_1321-1

OPENSUSE-SU-2024_1322-1

OPENSUSE-SU-2024_1322-2

OPENSUSE-SU-2024_1332-1

OPENSUSE-SU-2024_1332-2

OPENSUSE-SU-2024_1466-1

OPENSUSE-SU-2024_1480-1

OPENSUSE-SU-2024_1489-1

OPENSUSE-SU-2024_1490-1

SUSE-SU-2024:1320-1

SUSE-SU-2024:1321-1

SUSE-SU-2024:1465-1

SUSE-SU-2024:1466-1

SUSE-SU-2024:1480-1

SUSE-SU-2024:1489-1

SUSE-SU-2024:1490-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 701

• 🔥 https://github.com/Kakashiiiiy/CVE-2021-29155 · Exploit
• 🔥 https://github.com/benschlueter/CVE-2021-29155 · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2024:1489-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1320-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47095 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1466-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-08377 · Security Note
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47095 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47095 · Vendor Advisory
• https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:1480-1 · Vendor Advisory
• https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c · Patch
• https://cve.org/CVERecord?id=CVE-2021-47095 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47095 · Vendor Advisory