SB20260824202 - Improper resource shutdown or release in Linux kernel net driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-74626)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper resource management in ntb_netdev_rx_handler() in the ntb_netdev driver when handling received packets and allocating replacement receive buffers. A remote attacker can send packets that trigger allocation failures and exhaust the receive queue to cause a denial of service.

The issue can stall packet reception while the network interface remains up.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/755fd7843f300d724caceabdf9bb13adc8701540
• https://git.kernel.org/stable/c/a4e340971fe8ccd245d206db4d43b2a0eec240bd
• https://git.kernel.org/stable/c/d2121faf133ac3bf9531b53a7e21273649a08517