CVE-2026-64113

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

ixgbevf: fix use-after-free in VEPA multicast source pruning

ixgbevf_clean_rx_irq() prunes frames whose source MAC matches the VF's

own address (VEPA multicast workaround) by freeing the skb and

continuing to the next descriptor:

dev_kfree_skb_irq(skb);

continue;

The skb pointer is declared outside the while loop and persists across

iterations. Because the continue skips the "skb = NULL" reset at the

bottom of the loop, the next iteration enters the "else if (skb)" path

and calls ixgbevf_add_rx_frag() on the freed skb, dereferencing

skb_shinfo(skb)->nr_frags - a use-after-free in NAPI softirq context.

The sibling driver iavf already handles this correctly by nulling the

pointer before continuing. Apply the same pattern here.

I do not have ixgbevf hardware; the bug was found by static analysis

(scan_drop_continue_loops.py + semgrep drop_continue_in_loop, multi-tool

corroboration with the highest score in

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References