PT-2024-11099 · Linux · Linux Kernel

Frieder Schrempf · Published 2021-05-06 · Updated 2024-12-06 · CVE-2021-46994

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 A null dereference error occurs in the Linux kernel when resuming after suspend, even when the interface was not previously enabled. This is caused by the driver queuing work via priv->restart work before the interface is brought up. The issue is resolved by moving the workqueue initialization to mcp251x can probe().

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-05164

CVE-2021-46994

Affected Products

Linux Kernel

References · 22

• https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 · Patch
• https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b · Patch
• https://ubuntu.com/security/CVE-2021-46994 · Vendor Advisory
• https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af · Patch
• https://osv.dev/vulnerability/CVE-2021-46994 · Vendor Advisory
• https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c · Patch
• https://cve.org/CVERecord?id=CVE-2021-46994 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46994 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46994 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46994 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46994 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-05164 · Security Note
• https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 · Note
• https://lore.kernel.org/linux-cve-announce/2024022826-CVE-2021-46994-4722@gregkh · Note
• https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 · Note