PT-2025-26147 · Linux+4 · Linux Kernel+4

Published 2023-05-09 · Updated 2025-07-15 · CVE-2022-50221

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue concerns an out-of-bounds access in the Linux kernel's drm/fb-helper. It occurs because fbdev's deferred I/O can only track pages, and when the fbdev screen buffer ends near the beginning of a page, that page could contain more scanlines, leading to the damage handler tracking non-existing scanlines as dirty. This provokes an out-of-bounds access during the screen update. To fix this, the maximum memory range is clipped to the size of the screen buffer.

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

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CESA-2023_2951

CVE-2022-50221

RHSA-2023:2458

RHSA-2023:2951

RHSA-2023_2458

RHSA-2023_2951

SUSE-SU-2025:02264-1

SUSE-SU-2025:02321-1

SUSE-SU-2025:2264-1

SUSE-SU-2025_02264-1

Affected Products

Astra Linux

Centos

Linux Kernel

Red Hat

Suse

References · 577

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50221.json · Exploit
• https://ubuntu.com/security/CVE-2022-50221 · Vendor Advisory
• https://git.kernel.org/stable/c/ae25885bdf59fde40726863c57fd20e4a0642183 · Patch
• https://git.kernel.org/stable/c/9c49ac792c639dbec0728b513329a32461f72253 · Patch
• https://osv.dev/vulnerability/CVE-2022-50221 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02321-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-50221 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-50221 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50221 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-50221 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:02264-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50221 · Vendor Advisory
• https://bugzilla.suse.com/1243627 · Note
• https://suse.com/security/cve/CVE-2022-49937 · Note
• https://suse.com/security/cve/CVE-2022-50012 · Note