CVE-2026-72150 sunrpc: fix uninitialized xprt_create_args structure
A local attacker can trigger a kernel panic or leak sensitive stack data due to uninitialized memory in the sunrpc subsystem.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72150?
CVE-2026-72150 is a vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
sunrpc: fix uninitialized xprt_create_args structure
The xprt_create_args structure is allocated on the stack without initialization in rpc_sysfs_xprt_switch_add_xprt_store(). While some fields are manually populated, critical fields like srcaddr, bc_xps, and flags contain uninitialized stack garbage.
This can lead to: 1. Kernel panic when xs_setup_xprt() dereferences garbage srcaddr 2. Information leak if srcaddr points to sensitive stack data 3. Unpredictable behavior if flags has random bits set
The fix is to zero-initialize the structure to ensure all unused fields are NULL/0, preventing the transport setup code from acting on garbage data.
Which versions are affected by CVE-2026-72150?
How do I fix CVE-2026-72150?
Apply the vendor's patch.
Is CVE-2026-72150 being exploited?
There is no known exploitation of CVE-2026-72150 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72150, DEBIAN-CVE-2026-72150, GHSA-3r6v-v38p-c2r8, UBUNTU-CVE-2026-72150.