PT-2024-29751 · Linux+2 · Linux Kernel+2

Syzbot · Published 2024-07-02 · Updated 2024-12-12 · CVE-2024-42111

Positive Technologies (AI Summary)

CVSS v3.1

6.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.10.0-rc2-syzkaller-00010-g2ab795141095

Description A vulnerability in the Linux kernel has been resolved, related to the btrfs file system. The issue occurs when the btrfs qgroup inherit structure is passed to the btrfs qgroup inherit function while the qgroup is disabled, causing the basic checks like num ref copies/num excl copies and the structure size checks to be skipped. This can lead to a slab-out-of-bounds error when the qgroup is re-enabled and the btrfs qgroup inherit function is called with an incorrect structure.

The estimated number of potentially affected devices worldwide is not specified. There is no information about real-world incidents where this issue was exploited.

Technical details about exploitation include:

• The btrfs qgroup inherit function is vulnerable to a slab-out-of-bounds error.
• The create pending snapshot, create pending snapshots, btrfs commit transaction, create snapshot, btrfs mksubvol, btrfs mksnapshot, btrfs ioctl snap create, btrfs ioctl snap create v2, and btrfs ioctl functions are involved in the call trace.
• The btrfs qgroup check inherit function is modified to only skip the source qgroup checks, allowing for the rejection of invalid btrfs qgroup inherit structures.

Recommendations To resolve the issue, update the Linux kernel to a version that includes the fix for the btrfs qgroup inherit structure checks. Specifically, the btrfs qgroup check inherit function should be modified to only skip the source qgroup checks, ensuring that invalid btrfs qgroup inherit structures are rejected.

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

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-04476

CVE-2024-42111

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 · 643

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42111.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