CVE-2026-98353 RDMA/erdma: Use IRQ-safe XArray helpers for QP and CQ tables
A race condition in the Linux kernel RDMA erdma driver can cause a deadlock and system hang when interrupts occur during queue pair creation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98353?
CVE-2026-98353 is a vulnerability in Linux, published on 6 Oct 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:
RDMA/erdma: Use IRQ-safe XArray helpers for QP and CQ tables
Locked QP and CQ lookups from EQ interrupts can deadlock with create-path XArray updates. If an interrupt arrives while the create path holds the plain xa_lock, the lookup spins forever trying to acquire the same lock.
Use IRQ-safe XArray helpers for all QP and CQ create-path updates, including the GSI QP store and error paths. Initialize both arrays with XA_FLAGS_LOCK_IRQ so sleeping allocations preserve interrupt state.
Which versions are affected by CVE-2026-98353?
How do I fix CVE-2026-98353?
Apply the vendor's patch.
Is CVE-2026-98353 being exploited?
There is no known exploitation of CVE-2026-98353 in the wild and no public exploit code.
Sources
Also known as AZL-106194, BELL-CVE-2026-98353, DEBIAN-CVE-2026-98353, GHSA-c26j-r98f-9j66, UBUNTU-CVE-2026-98353.