PT-2024-11058 · Linux+1 · Linux Kernel+1

Published 2021-04-16 · Updated 2024-08-19 · CVE-2021-46908

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 use of correct permission flags for mixed signed bounds arithmetic in the Linux kernel's bpf. It involves forbidding the addition of unknown scalars with mixed signed bounds due to Spectre v1 masking mitigation, requiring the bypass spec v1 flag instead of allow ptr leaks.

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

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2025-02864

CVE-2021-46908

OPENSUSE-SU-2024_1489-1

SUSE-SU-2024:1465-1

SUSE-SU-2024:1489-1

Affected Products

Linux Kernel

Suse

References · 348

• https://cve.org/CVERecord?id=CVE-2021-46908 · Security Note
• https://git.kernel.org/stable/c/4f3ff11204eac0ee23acf64deecb3bad7b0db0c6 · Patch
• https://git.kernel.org/stable/c/4ccdc6c6cae38b91c871293fb0ed8c6845a61b51 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-46908 · Security Note
• https://bdu.fstec.ru/vul/2025-02864 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:1489-1 · Vendor Advisory
• https://git.kernel.org/stable/c/9601148392520e2e134936e76788fc2a6371e7be · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46908 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46908 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-46908 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46908 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1465-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-46908 · Vendor Advisory
• https://bugzilla.suse.com/1221990 · Note
• https://suse.com/security/cve/CVE-2020-36781 · Note