CVE-2026-58082: The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output. Some…
CVE-2026-58082 · Severity: critical · CVSS 9.8 · Published 2026-08-19
The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output. Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes.
An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.
No. Junglewise Threat Intelligence has no report of CVE-2026-58082 being exploited in the wild.
How severe is CVE-2026-58082?
Critical severity, with a CVSS score of 9.8, published 19 August 2026.
Which products and versions are affected?
Freebsd. The advisory does not name versions.
Is there a fix for CVE-2026-58082?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-58082?
Check whether you run Freebsd. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.