CVE-2024-35958
Description
This is a vulnerability in the Linux kernel's Elastic Network Adapter (ENA) driver, which manages network interfaces on certain platforms. The driver utilizes two types of transmit (TX) queues: one for packets from the network stack and another for packets directed by XDP (eXpress Data Path) operations. The function ena_free_tx_bufs() is responsible for unmapping and freeing descriptors of uncompleted TX transactions. However, it incorrectly assumes that all TX queues handle packets from the network stack, leading to improper handling of descriptors in XDP-specific queues. This mismanagement can result in descriptors not being freed correctly, potentially causing system crashes, especially during a Virtual Function (VF) reset. The issue has been resolved by updating the driver to correctly differentiate between the two types of TX queues, ensuring proper descriptor management. Users are advised to update their Linux kernel to a version that includes this fix to maintain system stability.
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 | 7.8 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | High |
| Integrity Impact | None | None | High |
| Availability Impact | High | High | High |
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
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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