PT-2024-29166 · Linux+2 · Linux Kernel+2

Baolin Wang · Published 2024-06-15 · Updated 2025-02-08 · CVE-2024-40949

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 The issue arises when replacing an old shmem folio with a new one, causing mem cgroup migrate() to clear the old folio's memcg data. As a result, the old folio cannot obtain the correct memcg's lruvec needed to remove itself from the LRU list when it is being freed. This could lead to possible serious problems, such as LRU list crashes due to holding the wrong LRU lock, and incorrect LRU statistics. The fix involves falling back to use the mem cgroup replace folio() to replace the old shmem folio.

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

Exploit

Weakness Enumeration

CWE-99

Related Identifiers

BDU:2026-04549

CVE-2024-40949

OESA-2025-1097

USN-6999-1

USN-6999-2

USN-7004-1

USN-7005-1

USN-7005-2

USN-7008-1

USN-7029-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 403

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40949.json · Exploit
• https://ubuntu.com/security/CVE-2024-40957 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-40984 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-53123 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-56769 · Security Note
• https://ubuntu.com/security/CVE-2024-41002 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-53122 · Security Note
• https://ubuntu.com/security/CVE-2024-38780 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-50181 · Security Note
• https://ubuntu.com/security/CVE-2024-40920 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-40975 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7005-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-38622 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-40921 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-39482 · Security Note