CVE-2023-53632
Description
A locking flaw in the Mellanox mlx5 Ethernet driver allowed calls to xdp_set_features() without holding the required rtnetlink (RTNL) lock.
A local administrator switching device profiles (for example, from an uplink representor to a Network Interface Card profile) could trigger notifier paths without proper synchronization, leading to kernel warnings and potential denial of service (system instability or crash).
Statement
The issue stems from invoking XDP feature updates on a registered network device without the RTNL lock, which can race with network-device notifiers during profile changes in mlx5e. The fix ensures the RTNL lock is taken where required before updating XDP features.
Mitigation
To mitigate this issue, prevent module mlx5_core from being loaded.
Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
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 | 5.3 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | High | 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 | Low | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
