CVE-2023-54090
Description
A flaw was found in the Linux kernel's ixgbe network driver. On systems with more than 64 CPUs, XDP_TX operations can cause a kernel panic due to an array-index-out-of-bounds access. The ixgbe_xdp_locking_key variable can be incorrectly decremented to zero during ring reconfiguration, causing the driver to use raw CPU numbers instead of CPU % 64 for XDP ring indexing, leading to NULL pointer dereference.
Statement
This flaw affects high-core-count systems (more than 64 CPUs) using Intel ixgbe network adapters with XDP programs. The panic can be triggered when loading XDP programs or when using ethtool --set-channels to reconfigure the interface. Servers with many cores using ixgbe NICs for XDP packet processing are at risk.
Mitigation
To mitigate this issue, avoid using XDP programs on ixgbe interfaces on systems with more than 64 CPUs, or prevent the ixgbe module from being loaded if not needed. See https://access.redhat.com/solutions/41278 for instructions on blocking modules.
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 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
