PT-2025-25917 · Linux+2 · Linux Kernel+2

Published 2022-08-28 · Updated 2025-06-19 · CVE-2022-49991

Positive Technologies (AI Summary)

CVSS v2.0

6.0

Medium

Base vector

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

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

Description The issue is related to the Linux kernel, specifically in the hugetlb mcopy atomic pte function. In the MCOPY ATOMIC CONTINUE case with a non-shared VMA, pages in the page cache are installed in the ptes, but hugepage add new anon rmap is called mistakenly because they are not vm shared. This results in corrupting the page->mapping used by page cache code.

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

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

BDU:2026-02027

CVE-2022-49991

RHSA-2023:2458

RHSA-2023_2458

RHSA-2025:14744

RHSA-2025:14749

Affected Products

Astra Linux

Linux Kernel

Red Hat

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49991.json · Exploit
• https://git.kernel.org/stable/c/da60ddd80d09f8371fbba1a238a4b318d13ba698 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-49991 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49991 · Vendor Advisory
• https://git.kernel.org/stable/c/ab74ef708dc51df7cf2b8a890b9c6990fac5c0c6 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49991 · Security Note
• https://ubuntu.com/security/CVE-2022-49991 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49991 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02027 · Security Note
• https://osv.dev/vulnerability/CVE-2022-49991 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49991 · Security Note
• https://git.kernel.org/stable/c/3ada1b3e58db255a14ec73a59d7913e84dc5a8a4 · Patch
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.65 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.6 · Note
• https://access.redhat.com/security/cve/cve-2022-49991 · Note