SB2026050237 - Improper input validation in Linux kernel nfc pn533 driver
Published: May 2, 2026
Security Bulletin ID
SB2026050237
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2026-43032)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to improper input validation in pn532_receive_buf() when processing malformed UART traffic. A local attacker can send a continuous stream of bytes without a valid frame header to cause a denial of service.
Remediation
Install update from vendor's website.
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