PT-2024-7086 · Linux+2 · Linux Kernel+2

Radu Rendec · Published 2024-07-03 · Updated 2024-12-19 · CVE-2024-42108

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 The issue is related to a use-after-free vulnerability in the rswitch tx free() function, which is inlined in rswitch poll(). This occurs because skb and gq->skbs[gq->dirty] are the same pointer. The skb is first freed using dev kfree skb any(), and then the value in skb->len is used to update interface statistics. This bug can be easily reproduced using KFENCE and will trigger a splat every few packets, with a simple ARP request or ICMP echo request being enough to exploit it.

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

BDU:2024-08351

CVE-2024-42108

USN-7089-1

USN-7089-2

USN-7089-3

USN-7089-4

USN-7089-5

USN-7089-6

USN-7089-7

USN-7090-1

USN-7095-1

USN-7156-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 645

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42108.json · Exploit
• https://ubuntu.com/security/CVE-2024-41079 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46753 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42295 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46795 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42127 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-45026 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46815 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46825 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-43895 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42238 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-42278 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-46868 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-43884 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-45000 · Vendor Advisory