CVE-2026-23335 RDMA/irdma: Fix kernel stack leak in irdma_create_user_ah()
A local attacker can read uninitialized kernel stack memory via the irdma RDMA driver, potentially exposing sensitive kernel data.
- 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-2026-23335?
CVE-2026-23335 is a medium-severity vulnerability in Linux kernel, published on 25 Mar 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/irdma: Fix kernel stack leak in irdma_create_user_ah()
struct irdma_create_ah_resp { // 8 bytes, no padding __u32 ah_id; // offset 0 - SET (uresp.ah_id = ah->sc_ah.ah_info.ah_idx) __u8 rsvd[4]; // offset 4 - NEVER SET <- LEAK };
rsvd[4]: 4 bytes of stack memory leaked unconditionally. Only ah_id is assigned before ib_respond_udata().
The reserved members of the structure were not zeroed.
Weakness: CWE-401
Which versions are affected by CVE-2026-23335?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23335?
Apply the vendor's patch.
Is CVE-2026-23335 being exploited?
There is no known exploitation of CVE-2026-23335 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23335, DEBIAN-CVE-2026-23335, GHSA-j6q7-jcx4-9hr4, ROOT-OS-DEBIAN-12-CVE-2026-23335, ROOT-OS-DEBIAN-13-CVE-2026-23335, ROOT-OS-UBUNTU-2204-CVE-2026-23335 and 2 more.