CVE-2024-56656
A bug in the bnxt_en network driver caused kernel crashes on Broadcom 5760X (P7) chips because the aggregation ID mask was wrong. The Linux kernel has fixed the issue by redefining the mask to 12 bits. Updating to a kernel version that includes this patch will prevent the crashes.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel 6.13 and earlier running the bnxt_en driver on servers with Broadcom 5760X (P7) network cards.
Real-world impact
An attacker could send crafted packets that trigger a kernel crash, forcing the system to reboot or become unresponsive, resulting in denial of service.
Why this severity
The CVSS score of 9.8 reflects that the flaw can be triggered over the network without authentication, and it compromises confidentiality, integrity, and availability by causing a system crash.
What to do about it
- 01Check the current kernel version with `uname -r`.
- 02Install the latest Linux kernel update that includes the bnxt_en aggregation ID mask fix (e.g., kernel 6.13 or newer).
- 03Reboot the system to load the updated kernel.
NVD description indicates vendor patch
Timeline
- Dec 27, 2024 · Dec 27, 2024PublishedDisclosed and added to the National Vulnerability Database.
- Aug 4, 2026 · 2d agoAdvisory updatedThe NVD record was last revised.
- Aug 4, 2026 · 1d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.