PT-2025-49469 · Linux+2 · Linux Kernel+2

Published 2025-12-08 · Updated 2026-04-20 · CVE-2022-50628

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.18-rc5-gud-5.18-rc5

Description The Linux kernel contains a flaw within the DRM/Gud subsystem related to uninitialized memory. Specifically, the iosys map variables are allocated on the stack without initialization, leading to unpredictable values for map->is iomem. This can cause issues in iosys map clear() when called from dma buf vmap(), resulting in a UBSAN (Undefined Behavior Sanitizer) warning related to an invalid boolean value. The issue occurs during the conditional setting of values based on map->is iomem.

Recommendations Update to a version newer than 5.18-rc5-gud-5.18-rc5 to address this issue.

Exploit

Related Identifiers

CVE-2022-50628

RHSA-2023:6583

RHSA-2023:7077

Affected Products

Centos

Linux Kernel

Red Hat

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50628.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50628 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-50628 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-50628 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-50628 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50628 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-50628 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-50628 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-50628 · Vendor Advisory
• https://git.kernel.org/stable/c/951df98024f7272f85df5044eca7374f5b5b24ef · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://lore.kernel.org/linux-cve-announce/2025120854-CVE-2022-50628-69d3@gregkh/T · Note
• https://git.kernel.org/stable/c/832f861a46039d50536dcfda0a9fb334b48d0f8b · Note
• https://twitter.com/CVEnew/status/1997863673704944111 · Twitter Post
• https://git.kernel.org/linus/951df98024f7272f85df5044eca7374f5b5b24ef · Note