CVE-2026-43032
Published: May 6, 2026Last modified: May 6, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.168-r0) |
| 25 LTS | linux-lts | Fixed (6.12.81-r0) | |
| Stream | linux-lts | Fixed (6.12.85-r0) |
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