PT-2024-36947 · Linux+2 · Linux Kernel+2

Syzbot · Published 2024-12-03 · Updated 2026-05-26 · CVE-2024-56639

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 versions prior to 6.12.0

Description A vulnerability in the Linux kernel has been resolved, related to the High-availability Seamless Redundancy (HSR) protocol. The issue arises from the hsr init skb() function not allocating sufficient bytes for RedBox support, leading to a potential crash when send hsr supervision frame() attempts to add additional components. This results in a kernel bug, as reported by syzbot, with symptoms including an invalid opcode and a crash. The vulnerability is related to the hsr init skb(), send hsr supervision frame(), and hsr proxy announce() functions.

Recommendations To resolve this issue, update the Linux kernel to a version that includes the fix for this vulnerability. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Resource Release

Resource Exhaustion

Allocation of Resources Without Limits

Weakness Enumeration

CWE-404

CWE-400

CWE-770

Related Identifiers

BDU:2026-04524

CVE-2024-56639

USN-7379-1

USN-7379-2

USN-7380-1

USN-7381-1

USN-7382-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 342

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56639.json · Exploit
• https://ubuntu.com/security/CVE-2024-56627 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56557 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57839 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56647 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56615 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2024-56639 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57849 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7381-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56558 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21653 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57906 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57841 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7382-1 · Vendor Advisory