PT-2025-8021 · Linux+3 · Linux Kernel+3

Alexander Duyck + 1 · Published 2022-04-01 · Updated 2025-09-29 · CVE-2022-49093

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 occurs when using page pool with page fragments in the Linux kernel. This problem arises during normal RX in the hns3 driver, where a page reference is dropped twice, resulting in an underflow. The issue is caused by incorrect coalescing logic in the skb try coalesce() function, which takes a page reference to a page instead of increasing the page pool frag reference. This can lead to IOMMU faults or silent memory corruption.

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

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALSA-2025_16880

BDU:2025-10592

CVE-2022-49093

RHSA-2022:8267

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

Linux Kernel

Red Hat

Suse

References · 1335

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49093.json · Exploit
• https://git.kernel.org/stable/c/c4fa19615806a9a7e518c295b39175aa47a685ac · Patch
• https://osv.dev/vulnerability/CVE-2022-49093 · 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://git.kernel.org/stable/c/72bb856d16e883437023ff2ff77d0c498018728a · Patch
• https://bdu.fstec.ru/vul/2025-10592 · Security Note
• https://ubuntu.com/security/CVE-2022-49093 · Vendor Advisory
• https://git.kernel.org/stable/c/1effe8ca4e34c34cdd9318436a4232dcb582ebf4 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-49093 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49093 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49093 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49093 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49093 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory