CVE-2026-58081 (Critical) detected in multiple libraries

[mend-bolt-for-github]

CVE-2026-58081 - Critical Severity Vulnerability

Vulnerable Libraries - src4.0.4, src4.0.4, src4.0.4, src4.0.4

src4.0.4

Library home page: https://github.com/MidnightBSD/src.git

Vulnerable Source Files (4)

/lib/libiconv_modules/UTF7/citrus_utf7.c
/lib/libiconv_modules/VIQR/citrus_viqr.c
/lib/libiconv_modules/ZW/citrus_zw.c
/lib/libiconv_modules/HZ/citrus_hz.c

src4.0.4

Library home page: https://github.com/MidnightBSD/src.git

Vulnerable Source Files (4)

/lib/libiconv_modules/UTF7/citrus_utf7.c
/lib/libiconv_modules/VIQR/citrus_viqr.c
/lib/libiconv_modules/ZW/citrus_zw.c
/lib/libiconv_modules/HZ/citrus_hz.c

src4.0.4

Library home page: https://github.com/MidnightBSD/src.git

Vulnerable Source Files (4)

/lib/libiconv_modules/UTF7/citrus_utf7.c
/lib/libiconv_modules/VIQR/citrus_viqr.c
/lib/libiconv_modules/ZW/citrus_zw.c
/lib/libiconv_modules/HZ/citrus_hz.c

src4.0.4

Library home page: https://github.com/MidnightBSD/src.git

Vulnerable Source Files (4)

/lib/libiconv_modules/UTF7/citrus_utf7.c
/lib/libiconv_modules/VIQR/citrus_viqr.c
/lib/libiconv_modules/ZW/citrus_zw.c
/lib/libiconv_modules/HZ/citrus_hz.c

Found in base branches: stable/4.0, master

Vulnerability Details

Several encoding modules, including HZ, UTF-7, VIQR, and ZW, did not properly check the size of the caller-supplied output buffer before writing converted characters.
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.

Publish Date: 2026-08-19

URL: CVE-2026-58081

CVSS 3 Score Details (9.8)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-08-19

Fix Resolution: https://github.com/freebsd/freebsd-src.git - release/14.3.0-p16,https://github.com/freebsd/freebsd-src.git - release/15.1.0-p1,https://github.com/freebsd/freebsd-src.git - release/14.4.0-p7,https://github.com/freebsd/freebsd-src.git - release/15.0.0-p11

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