CVE-2026-43032

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.

Score

CVSS 3.1 5.5 Medium

Status

Analyzed - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-05-01

Last modified

2026-05-11

Affected products

• Linux Kernel (Linux)

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
• https://git.kernel.org/stable/c/ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8
• https://git.kernel.org/stable/c/cf2ff10183204349edfd6b972e189375fc5f1fb0
• https://git.kernel.org/stable/c/f48ab6ee654ecc350434e4566bc785773f412b7e