PT-2025-41022 · Linux · Linux Kernel

Published 2022-10-19 · Updated 2025-10-07 · CVE-2022-50517

Positive Technologies (AI Summary)

CVSS v2.0

5.7

Medium

Base vector

AV:L/AC:L/Au:S/C:P/I:P/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.0.0-revert-b653db77-fix+ #29

Description A flaw exists in the Linux kernel's mm/huge memory subsystem related to handling transparent huge pages (THP) splits. Specifically, the issue involves incorrectly overwriting the swp entry t during a THP split operation. This can lead to a soft lockup, as observed during stress testing with stressng mmap. The problem arises because the patch intended to avoid clearing PG private when folio->private is not NULL, but it inadvertently overwrites page->private for THP tail pages that are using it to store swap cache information. This issue was identified and addressed with a revert commit.

Recommendations Update to a version of the Linux kernel that includes the fix, which is the revert commit 6.0.0-revert-b653db77-fix+ #29 or a later version.

Exploit

Fix

Weakness Enumeration

CWE-826

Related Identifiers

BDU:2025-12806

CVE-2022-50517

Affected Products

Linux Kernel

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50517.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50517 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-50517 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-50517 · Security Note
• https://bdu.fstec.ru/vul/2025-12806 · Security Note
• https://osv.dev/vulnerability/CVE-2022-50517 · Vendor Advisory
• https://git.kernel.org/stable/c/71e2d666ef85d51834d658830f823560c402b8b6 · Patch
• https://git.kernel.org/stable/c/8cace0eeb03d6043827faa6cf6c9067a9f05cd9f · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-50517 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-50517 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50517 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/CVEnew/status/1975615153539260432 · Twitter Post
• https://git.kernel.org/linus/71e2d666ef85d51834d658830f823560c402b8b6 · Note