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CVE-2026-58082 is a stack-based buffer overflow in the ISO-2022 encoding module used by iconv(3). The module allocates a six-byte intermediate character-output buffer based on MB_LEN_MAX, but certain ISO-2022 variants can generate up to 10 bytes for one character. Processing such a character overflows the stack buffer by up to four bytes during conversion.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A stack buffer overflow in the ISO-2022 encoding module: its intermediate output buffer is limited to 6 bytes, while certain ISO-2022 variants require up to 10 bytes per character. Applications using iconv(3) to convert untrusted input to or from affected encodings may be vulnerable.
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.