CVE-2026-23023 idpf: fix memory leak in idpf_vport_rel()
A memory leak in the Intel idpf network driver during reset can lead to resource exhaustion and denial of service.
- 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-2026-23023?
CVE-2026-23023 is a medium-severity denial of service vulnerability in Linux kernel, published on 31 Jan 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:
idpf: fix memory leak in idpf_vport_rel()
Free vport->rx_ptype_lkup in idpf_vport_rel() to avoid leaking memory during a reset. Reported by kmemleak:
unreferenced object 0xff450acac838a000 (size 4096): comm "kworker/u258:5", pid 7732, jiffies 4296830044 hex dump (first 32 bytes): 00 00 00 00 00 10 00 00 00 10 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 ................ backtrace (crc 3da81902): __kmalloc_cache_noprof+0x469/0x7a0 idpf_send_get_rx_ptype_msg+0x90/0x570 [idpf] idpf_init_task+0x1ec/0x8d0 [idpf] process_one_work+0x226/0x6d0 worker_thread+0x19e/0x340 kthread+0x10f/0x250 ret_from_fork+0x251/0x2b0 ret_from_fork_asm+0x1a/0x30
Weakness: CWE-401
Which versions are affected by CVE-2026-23023?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23023?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-23023 being exploited?
There is no known exploitation of CVE-2026-23023 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23023, DEBIAN-CVE-2026-23023, GHSA-qwpm-8xh6-72rp, ROOT-OS-DEBIAN-13-CVE-2026-23023, ROOT-OS-UBUNTU-2404-CVE-2026-23023, UBUNTU-CVE-2026-23023.