PT-2025-25899 · Linux+2 · Linux Kernel+2

Published 2022-08-17 · Updated 2025-06-19 · CVE-2022-49973

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 vulnerability in the Linux kernel has been resolved, which fixes a wrong last sg check in sk msg recvmsg(). This issue leads to a kernel NULL pointer dereference. The problem arises from the lack of marking the end of the scatterlist in the sockmap redirection case. The fix involves changing the last sg check to sg is last() and adding a judgment to check if the current index is not equal to the end of the scatterlist.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-04563

CVE-2022-49973

RHSA-2023:2458

RHSA-2023_2458

Affected Products

Astra Linux

Linux Kernel

Red Hat

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49973.json · Exploit
• https://git.kernel.org/stable/c/583585e48d965338e73e1eb383768d16e0922d73 · Patch
• https://git.kernel.org/stable/c/de22cba333d8699ad77e79f862fe1320cb1284de · Patch
• https://osv.dev/vulnerability/CVE-2022-49973 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49973 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49973 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49973 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49973 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49973 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49973 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-04563 · Security Note
• https://git.kernel.org/stable/c/10ee118a1756141f8e9c87aa7344ed12b41630a8 · Patch
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.8 · Note
• https://lore.kernel.org/linux-cve-announce/2025061818-CVE-2022-49973-d4f3@gregkh/T · Note
• https://twitter.com/CVEnew/status/1935727358738153874 · Twitter Post