Improper resource shutdown or release in Linux kernel - CVE-2026-74626
Published: August 24, 2026
Vulnerability identifier: #VU144937
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: CVE-2026-74626
CWE-ID: CWE-404
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74626
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.107-1
linux (Debian package) - update to 6.12.107-1