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CVE-2026-58082 is a buffer overflow vulnerability in FreeBSD's iconv(3) implementation, specifically in the ISO-2022 encoding module. According to the provided advisory context, the module uses a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output, but some ISO-2022 variants can require up to 10 bytes per character. When iconv processes untrusted text involving affected ISO-2022 conversions, this size mismatch can trigger a stack buffer overflow of up to four bytes during character conversion. The issue is part of FreeBSD advisory SA-26:49.iconv covering multiple iconv encoding-module overflows.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An iconv vulnerability affecting conversion of certain stateful encodings including HZ, UTF-7, VIQR, ZW, and ISO-2022.
An iconv vulnerability in FreeBSD that can affect applications processing untrusted text in certain legacy encodings.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.