CVE-2026-99045 ibmveth: h_free logical LAN on open-fail after register
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-99045?
CVE-2026-99045 is a vulnerability in Linux, published on 23 Oct 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ibmveth: h_free logical LAN on open-fail after register
ibmveth_open() registers the logical LAN, then allocates the RX buffer pools. A pool failure jumps to out_free_buffer_pools without h_free_logical_lan(), so PHYP still owns the buffer-list page when it is unmapped. request_irq() failure already issued the hypercall before taking the same label.
Move that h_free to the shared post-register unwind so both paths deregister before the buffer list is unmapped.
Which versions are affected by CVE-2026-99045?
How do I fix CVE-2026-99045?
Upgrade to a fixed version.
Is CVE-2026-99045 being exploited?
There is no known exploitation of CVE-2026-99045 in the wild and no public exploit code.
Sources
Also known as AZL-110924, BELL-CVE-2026-99045, DEBIAN-CVE-2026-99045, GHSA-5hch-2jpc-2mcv, UBUNTU-CVE-2026-99045.