IT

Tracker / CVE-2026-31660

CVE-2026-31660

Medium 5.5

In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: allocate rx skb before consuming bytes pn532_receive_buf() reports the number of accepted bytes to the serdev core. The current code consumes bytes into recv_skb and may already hand a complete frame to pn533_recv_frame() before allocating a fresh receive buffer. If that alloc_skb() fails, the callback returns 0 even though it has already consumed bytes, and it leaves recv_skb as NULL for the next receive callback. That breaks the receive_buf() accounting contract and can also lead to a NULL dereference on the next skb_put_u8(). Allocate the receive skb lazily before consuming the next byte instead. If allocation fails, return the number of bytes already accepted.

Affected products and versions

linux linux_kernel
linux linux_kernel · 5.11 → 5.15.203
linux linux_kernel · 5.16 → 6.1.169
linux linux_kernel · 5.5.1 → 5.10.253
linux linux_kernel · 6.13 → 6.18.23
linux linux_kernel · 6.19 → 6.19.13
linux linux_kernel · 6.2 → 6.6.135
linux linux_kernel · 6.7 → 6.12.82

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References