PT-2025-25918 · Linux+1 · Linux Kernel+1

Published 2022-08-28 · Updated 2025-06-19 · CVE-2022-49992

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 6.0.0

Description A bug in the Linux kernel has been resolved, which was reported by Yu Zhao after a commit added a check in swp offset pfn() for swap type. The issue triggers because pfn swap entry to page() could be called upon a genuine swap entry. The fix involves only calling pfn swap entry to page() when it's a write migration entry where the page is used.

Recommendations For Linux kernel versions prior to 6.0.0, update to version 6.0.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the pfn swap entry to page() function until a patch is available. Avoid using the swp offset pfn() function in sensitive operations until the issue is resolved.

Exploit

Fix

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

BDU:2026-04488

CVE-2022-49992

RHSA-2023:2458

Affected Products

Astra Linux

Linux Kernel

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49992.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2022-49992 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-49992 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49992 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49992 · Vendor Advisory
• https://git.kernel.org/stable/c/5fcf81e308d1f4ae95f31690d2a80b7061385ff9 · Patch
• https://osv.dev/vulnerability/CVE-2022-49992 · Vendor Advisory
• https://git.kernel.org/stable/c/3d2f78f08cd8388035ac375e731ec1ac1b79b09d · Patch
• https://cve.org/CVERecord?id=CVE-2022-49992 · Security Note
• https://bdu.fstec.ru/vul/2026-04488 · Security Note
• https://ubuntu.com/security/CVE-2022-49992 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2025061825-CVE-2022-49992-c5f0@gregkh/T · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.6 · Note
• https://access.redhat.com/security/cve/cve-2022-49992 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note