PT-2024-2974 · Linux+2 · Linux Kernel+2

Published 2024-02-27 · Updated 2024-08-19 · CVE-2021-46918

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 issue is related to the idxd component of the Linux kernel and involves the recording of pasid when a device is shut down. Exploitation of this issue may allow an attacker to impact the integrity of protected information. The problem arises because the current code leaves MSIX enabled and pasid entries programmed at device shutdown. To address this, disabling or clearing MSIX permission entries on device shutdown has been implemented to mirror the enabling of MSIX entries on probe.

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

Exploit

Weakness Enumeration

CWE-99

Related Identifiers

BDU:2024-03143

CVE-2021-46918

OPENSUSE-SU-2024_1489-1

SUSE-SU-2024:1465-1

SUSE-SU-2024:1489-1

Affected Products

Linux Kernel

Red Os

Suse

References · 342

• 🔥 https://github.com/Kakashiiiiy/CVE-2021-29155 · Exploit
• 🔥 https://github.com/benschlueter/CVE-2021-29155 · Exploit
• https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997 · Patch
• https://bdu.fstec.ru/vul/2024-03143 · Security Note
• https://osv.dev/vulnerability/CVE-2021-46918 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46918 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:1489-1 · Vendor Advisory
• https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46918 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-46918 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46918 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46918 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1465-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-46918 · Security Note
• https://bugzilla.suse.com/1221990 · Note