CVE-2026-92513 RDMA/mana_ib: drain QP references after partial table insertion
A race condition in the Linux kernel mana_ib driver allows a use-after-free, potentially enabling local attackers to execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-92513?
CVE-2026-92513 is an use after free vulnerability in Linux, published on 17 Sep 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:
RDMA/mana_ib: drain QP references after partial table insertion
mana_table_store_ud_qp() publishes a QP at its send-queue id before inserting the receive-queue id, dropping the XArray lock between the two xa_insert_irq() calls. A concurrent completion handler can look up the QP and take a transient reference. When the second insertion fails, the rollback erased only the send-queue entry and returned, leaving both the initial table reference and the transient reference outstanding while RDMA core frees the QP, causing a use-after-free.
Drain the reference as normal destruction does: drop the initial reference and wait for qp->free, releasing the QP only after every concurrent lookup returns its reference.
Which versions are affected by CVE-2026-92513?
How do I fix CVE-2026-92513?
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-2026-92513 being exploited?
There is no known exploitation of CVE-2026-92513 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-92513, DEBIAN-CVE-2026-92513, GHSA-r87w-wp8m-2wvh, UBUNTU-CVE-2026-92513.