PT-2025-8555 · Linux+2 · Linux Kernel+2

Pablo Neira Ayuso · Published 2022-01-01 · Updated 2026-04-20 · CVE-2022-49622

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 in the Linux kernel when the verdict is NF STOLEN, potentially allowing access to freed memory. This happens when tracing is enabled and can involve accessing skb->nf trace, skb->mark, computing the trace id, or dumping the packet payload. To mitigate this, a cached copy of skb->nf trace is kept in the trace state struct and refreshed when the verdict is not STOLEN. Additionally, access to skb->mark is skipped when the verdict is STOLEN, the trace id is precomputed, and packet dumping is only done when the verdict is not STOLEN.

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

Exploit

Use After Free

Double Free

Weakness Enumeration

CWE-416

CWE-415

Related Identifiers

AZL-59013

BDU:2025-04336

CVE-2022-49622

OESA-2025-2118

OESA-2025-2119

SUSE-SU-2025:02334-1

SUSE-SU-2025_02334-1

Affected Products

Debian

Linux Kernel

Suse

References · 314

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49622.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49622 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2025-2119 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49622 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-04336 · Security Note
• https://git.kernel.org/stable/c/0016d5d46d7440729a3132f61a8da3bf7f84e2ba · Patch
• https://osv.dev/vulnerability/AZL-59013 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38582 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-37932 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:02334-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49622 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-38563 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-38085 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-38180 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49622 · Security Note