PT-2023-9337 · Linux+1 · Linux Kernel+1

Published 2023-01-10 · Updated 2024-08-29 · CVE-2022-48876

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 versions prior to 6.1.7

Description The vulnerability is related to a null pointer dereference in the mac80211 component of the Linux kernel. This occurs due to improper initialization of rx->link sta in certain code paths, leading to a crash when rx->link sta is assumed to be valid if rx->sta is valid. One known instance of this issue is triggered by the ieee80211 rx h amsdu function being called from fast-rx. The vulnerability can result in a system crash and potentially compromise the system.

Recommendations To resolve this issue, upgrade the Linux kernel to version 6.1.7 or later. As a temporary workaround, consider disabling the ieee80211 rx h amsdu function or restricting access to the vulnerable mac80211 component until a patch is available. However, the most effective solution is to update the kernel to a version that includes the fix for this vulnerability.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2024-06644

CVE-2022-48876

Affected Products

Linux Kernel

Red Os

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48876.json · Exploit
• https://git.kernel.org/stable/c/e66b7920aa5ac5b1a1997a454004ba9246a3c005 · Patch
• https://git.kernel.org/stable/c/a57c981d9f24d2bd89eaa76dc477e8ca252e22e8 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-48876 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-48876 · Security Note
• https://osv.dev/vulnerability/CVE-2022-48876 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-48876 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-48876 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-48876 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-48876 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-06644 · Security Note
• https://redos.red-soft.ru/support/secure · Note
• https://twitter.com/oktsec/status/1826186055302709658 · Twitter Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-kernel-lt-29-08-24 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note