CVE-2026-98429 RDMA/efa: Keep EQ resources alive while IRQ is registered
A use-after-free in the Linux kernel EFA driver allows local attackers to cause denial of service or potentially execute code via race conditions during IRQ handling.
- 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-2026-98429?
CVE-2026-98429 is an use after free vulnerability in Linux, published on 14 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/efa: Keep EQ resources alive while IRQ is registered
The completion IRQ handler accesses the EQ state and DMA buffer. Its IRQ was registered before that state was initialized, while teardown released the buffer before free_irq() synchronized the handler.
Initialize the EQ without arming it, register the IRQ, and then arm it. Reverse the resource order during teardown by freeing the IRQ before destroying the EQ.
Which versions are affected by CVE-2026-98429?
How do I fix CVE-2026-98429?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-98429 being exploited?
There is no known exploitation of CVE-2026-98429 in the wild and no public exploit code.
Sources
Also known as AZL-108149, BELL-CVE-2026-98429, DEBIAN-CVE-2026-98429, GHSA-8cmm-3crh-f6m2, UBUNTU-CVE-2026-98429.