CVE-2024-35877
Description
CVE-2024-35877 pertains to a flaw in the Linux kernel's handling of Page Attribute Table (PAT) settings during Copy-On-Write (COW) operations. When a write operation triggers a COW event, the kernel may replace the original page table entries (PTEs) with anonymous folios. This replacement disrupts the kernel's ability to accurately retrieve the correct page frame number (PFN) and cache mode using the follow_phys() function. Consequently, this mismanagement can lead to memory leaks or system instability.
During COW operations, the kernel's PAT handling may incorrectly replace PTEs, leading to failures in functions like untrack_pfn() and track_pfn_copy(). This mismanagement can result in improper memory tracking and potential leaks.
Systems may experience memory leaks or instability due to the kernel's inability to correctly manage memory attributes during COW events.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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