PT-2021-8022 · Linux+2 · Linux Kernel+2

Sanjay Kumar · Published 2021-04-12 · Updated 2024-10-29 · CVE-2021-46920

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:H/A:N

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to the dmaengine component, specifically the idxd driver, where the current code blindly writes over the SWERR and OVERFLOW bits. This can cause the driver to clobber the OVERFLOW bit that comes after the register is read, potentially allowing an attacker to disclose confidential information.

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

Exploit

Weakness Enumeration

CWE-353

Related Identifiers

BDU:2024-03141

CVE-2021-46920

OPENSUSE-SU-2024_1489-1

SUSE-SU-2024:1465-1

SUSE-SU-2024:1489-1

Affected Products

Linux Kernel

Red Os

Suse

References · 349

• 🔥 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://bdu.fstec.ru/vul/2024-03141 · Security Note
• https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f · Patch
• https://ubuntu.com/security/CVE-2021-46920 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-46920 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46920 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46920 · Vendor Advisory
• https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8 · Patch
• https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:1465-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46920 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46920 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-46920 · Security Note