CVE-2026-74385 nvmet-tcp: check return value of nvmet_tcp_set_queue_sock
An attacker can cause resource leakage and potential denial of service in the Linux kernel's NVMe over TCP module by triggering a socket state failure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74385?
CVE-2026-74385 is a high-severity denial of service vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
nvmet-tcp: check return value of nvmet_tcp_set_queue_sock
The return value of nvmet_tcp_set_queue_sock() is currently ignored in nvmet_tcp_tls_handshake_done(). If it fails (e.g., due to the socket not being in TCP_ESTABLISHED state), the socket callbacks will not be properly set, leading to queue and socket leakage.
Fix this by capturing the return value and calling nvmet_tcp_schedule_release_queue() on failure to ensure proper cleanup.
Which versions are affected by CVE-2026-74385?
How do I fix CVE-2026-74385?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-74385 being exploited?
There is no known exploitation of CVE-2026-74385 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74385, DEBIAN-CVE-2026-74385, GHSA-33r9-vmmw-q268, UBUNTU-CVE-2026-74385.