PT-2025-18493 · Linux+2 · Linux Kernel+2

Published 2025-05-01 · Updated 2025-07-10 · CVE-2022-49776

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A vulnerability in the Linux kernel has been resolved, related to the macvlan module. The issue is that macvlan does not enforce a consistent minimal MTU (Maximum Transmission Unit) of 68, even when creating a link. This could lead to crashes in the IPv6 stack if the link is brought up. The patch ensures that macvlan enforces a minimal MTU of 68.

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

Exploit

Weakness Enumeration

CWE-371

Related Identifiers

BDU:2026-05807

CVE-2022-49776

SUSE-SU-2025:01918-1

SUSE-SU-2025:01966-1

SUSE-SU-2025:01983-1

SUSE-SU-2025:02173-1

SUSE-SU-2025:02262-1

SUSE-SU-2025:2173-1

SUSE-SU-2025_01983-1

SUSE-SU-2025_02173-1

SUSE-SU-2025_02262-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 654

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49776.json · Exploit
• https://git.kernel.org/stable/c/650137a7c0b2892df2e5b0bc112d7b09a78c93c8 · Patch
• https://git.kernel.org/stable/c/b64085b00044bdf3cd1c9825e9ef5b2e0feae91a · Patch
• https://ubuntu.com/security/CVE-2022-49776 · Vendor Advisory
• https://git.kernel.org/stable/c/e929ec98c0c3b10d9c07f3776df0c1a02d7a763e · Patch
• https://git.kernel.org/stable/c/2b055c719d8f94c15ec9b7659978133030c6a353 · Patch
• https://osv.dev/vulnerability/CVE-2022-49776 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49776 · Security Note
• https://bdu.fstec.ru/vul/2026-05807 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:01983-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02173-1 · Vendor Advisory
• https://git.kernel.org/stable/c/a62aa84fe19eb24d083d600a074c009a0a66d4f3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49776 · Security Note
• https://git.kernel.org/stable/c/d2fee7d121d189c6dc905b727d60e7043a6655bb · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:01966-1 · Vendor Advisory