PT-2025-13302 · Linux+4 · Linux Kernel+4

Published 2023-11-07 · Updated 2025-05-29 · CVE-2022-49760

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

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

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

Description A vulnerability has been resolved in the Linux kernel related to the handling of PTE markers in the hugetlb change protection() function. The issue can be triggered by mapping a memfd backed by huge pages, registering uffd-wp, and then uffd-wp'ing an unmapped page or uffd-unprotecting it. This can lead to a VM BUG ON and a kernel BUG. The vulnerability can be exploited by playing with virtio-mem and background snapshots using uffd-wp on hugetlb in QEMU.

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

Exploit

Weakness Enumeration

CWE-388

Related Identifiers

BDU:2025-06305

CVE-2022-49760

RHSA-2023:6583

RHSA-2023_6583

Affected Products

Astra Linux

Linux Kernel

Qemu

Red Hat

Red Os

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49760.json · Exploit
• https://git.kernel.org/stable/c/6062c992e912df1eedad52cf64efb3d48e8d35c5 · Patch
• https://git.kernel.org/stable/c/0e678153f5be7e6c8d28835f5a678618da4b7a9c · Patch
• https://cve.org/CVERecord?id=CVE-2022-49760 · Security Note
• https://ubuntu.com/security/CVE-2022-49760 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49760 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49760 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-06305 · Security Note
• https://osv.dev/vulnerability/CVE-2022-49760 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49760 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49760 · Vendor Advisory
• https://redos.red-soft.ru/support/secure · Note
• https://lore.kernel.org/linux-cve-announce/2025032703-CVE-2022-49760-97be@gregkh/T · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/mnozhestvennye-uyazvimosti-kernel-lt-290525 · Note