PT-2024-2976 · Linux+1 · Linux Kernel+1

Alexander Duyck · Published 2024-02-27 · Updated 2024-04-18 · CVE-2021-46916

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 a NULL pointer dereference in the ethtool loopback test of the ixgbe driver. This occurs because there isn't a q vector associated with the test ring when it is setup, as interrupts are not normally added to the test rings. To address this, code has been added to check for a q vector before returning a napi id value. If a q vector is not present, it will return a value of 0.

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:2024-03145

CVE-2021-46916

Affected Products

Linux Kernel

Red Os

References · 15

• https://cve.org/CVERecord?id=CVE-2021-46916 · Security Note
• https://ubuntu.com/security/CVE-2021-46916 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46916 · Vendor Advisory
• https://git.kernel.org/stable/c/31166efb1cee348eb6314e9c0095d84cbeb66b9d · Patch
• https://bdu.fstec.ru/vul/2024-03145 · Security Note
• https://git.kernel.org/stable/c/758d19098df4b0bbca9f40d6ae6c82c9c18b9bba · Patch
• https://osv.dev/vulnerability/CVE-2021-46916 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46916 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46916 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46916 · Vendor Advisory
• https://redos.red-soft.ru/support/secure · Note
• https://twitter.com/CVEnew/status/1762376170610311286 · Twitter Post
• https://t.me/cvenotify/76267 · Telegram Post
• https://git.kernel.org/linus/31166efb1cee348eb6314e9c0095d84cbeb66b9d · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-yadra-os-18-04-24 · Note