CVE-2026-43032

Description

In the Linux kernel, the following vulnerability has been resolved: NFC: pn533: bound the UART receive buffer pn532_receive_buf() appends every incoming byte to dev->recv_skb and only resets the buffer after pn532_uart_rx_is_frame() recognizes a complete frame. A continuous stream of bytes without a valid PN532 frame header therefore keeps growing the skb until skb_put_u8() hits the tail limit. Drop the accumulated partial frame once the fixed receive buffer is full so malformed UART traffic cannot grow the skb past PN532_UART_SKB_BUFF_LEN.

References

• https://git.kernel.org/stable/c/23e925183db26cd322597679669ad29d70ed2ada
• https://git.kernel.org/stable/c/2c1fadd221b21d8038acfe6a0f56291881d5ff76
• https://git.kernel.org/stable/c/30fe3f5f6494f827d812ff179f295a8e532709d6
• https://git.kernel.org/stable/c/3adca9be14bf36b927193f05f5aea35a1a90e913
• https://git.kernel.org/stable/c/8bedf1dd5640ac8997bff00bbefe241b438df397