CVE-2026-43032 Details
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.
A vulnerability in the Linux kernel's NFC PN533 UART driver can lead to a buffer overflow. The issue arises because the function 'pn532_receive_buf()' continuously appends incoming bytes to the receive buffer without properly validating the data. This allows malformed UART traffic to accumulate and potentially overflow the buffer limit. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/23e925183db26cd322597679669ad29d70ed2ada | kernel.org | Patch |
| https://git.kernel.org/stable/c/2c1fadd221b21d8038acfe6a0f56291881d5ff76 | kernel.org | Patch |
| https://git.kernel.org/stable/c/30fe3f5f6494f827d812ff179f295a8e532709d6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/3adca9be14bf36b927193f05f5aea35a1a90e913 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8bedf1dd5640ac8997bff00bbefe241b438df397 | kernel.org | Patch |
| https://git.kernel.org/stable/c/ad2f60de5045bfb5d20ea468a97c8760c6a3a4f8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/cf2ff10183204349edfd6b972e189375fc5f1fb0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f48ab6ee654ecc350434e4566bc785773f412b7e | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.5, < 5.10.253 >= 5.11, < 5.15.203 >= 5.16, < 6.1.168 >= 6.2, < 6.6.134 >= 6.7, < 6.12.81 >= 6.13, < 6.18.22 >= 6.19, < 6.19.12 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | Initial Analysis | [email protected] |
| May 1, 2026 | New CVE Received | kernel.org |