PT-2025-8360 · Linux+4 · Linux Kernel+4

Jean-Philippe Brucker · Published 2022-05-06 · Updated 2025-09-29 · CVE-2022-49426

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A use-after-free issue in the Linux kernel has been identified, specifically in the io/mm/arm-smmu-v3-sva component. The problem arises from calling arm64 mm context put() without holding a reference to the mm, which can lead to the mm being freed prematurely. To address this, mmgrab() and mmdrop() are used to ensure the mm is only freed after the ASID has been unpinned.

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

Exploit

Double Free

Use After Free

Weakness Enumeration

CWE-415

CWE-416

Related Identifiers

ALSA-2025_16880

BDU:2025-04342

CESA-2022_7683

CVE-2022-49426

RHSA-2022:7683

RHSA-2022:8267

RHSA-2022_7683

RHSA-2022_8267

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1241-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

Affected Products

Astra Linux

Centos

Linux Kernel

Red Hat

Suse

References · 1335

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49426.json · Exploit
• https://git.kernel.org/stable/c/e3cbbdbff8a4db5d053c53fd71be62ccccdb52b0 · Patch
• https://osv.dev/vulnerability/CVE-2022-49426 · Vendor Advisory
• https://git.kernel.org/stable/c/9aa215450888cf29af0c479e14a712dc6b0c506c · Patch
• https://ubuntu.com/security/CVE-2022-49426 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49426 · Security Note
• https://git.kernel.org/stable/c/fc90f13ea0dcd960e5002d204fa55cec4e0db2fa · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49426 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-04342 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49426 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory
• https://git.kernel.org/stable/c/cbd23144f7662b00bcde32a938c4a4057e476d68 · Patch