Out-of-bounds write in FreeBSD - CVE-2026-58081
Published: July 1, 2026
Vulnerability identifier: #VU136020
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58081
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a buffer overflow.
The vulnerability exists due to improper input validation in multiple iconv(3) encoding modules when converting untrusted input to or from affected encodings. A remote attacker can supply crafted input to trigger a buffer overflow.
The issue affects encoding modules including HZ, UTF-7, VIQR, and ZW.
Affected software
FreeBSD
How to mitigate CVE-2026-58081
Install security update from vendor's website.