CVE-2026-31646 net: lan966x: fix page_pool error handling in lan966x_fdma_rx_alloc_page_pool()

What is CVE-2026-31646?

CVE-2026-31646 is a medium-severity vulnerability in Linux kernel, published on 24 Apr 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:

net: lan966x: fix page_pool error handling in lan966x_fdma_rx_alloc_page_pool()

page_pool_create() can return an ERR_PTR on failure. The return value is used unconditionally in the loop that follows, passing the error pointer through xdp_rxq_info_reg_mem_model() into page_pool_use_xdp_mem(), which dereferences it, causing a kernel oops.

Add an IS_ERR check after page_pool_create() to return early on failure.

Weakness: CWE-476

Which versions are affected by CVE-2026-31646?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-31646?

Apply the vendor's patch.

Is CVE-2026-31646 being exploited?

There is no known exploitation of CVE-2026-31646 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-83639, BELL-CVE-2026-31646, DEBIAN-CVE-2026-31646, GHSA-vv8c-r99f-f6q8, ROOT-OS-UBUNTU-2404-CVE-2026-31646, UBUNTU-CVE-2026-31646.