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CVE-2026-6042

CVE-2026-6042 · musl libc GB18030 4-byte Decoder iconv.c iconv algorithmic complexity

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A security flaw has been discovered in musl libc up to 1.2.6. Affected is the function iconv of the file src/locale/iconv.c of the component GB18030 4-byte Decoder. Performing a manipulation results in inefficient algorithmic complexity. The attack must be initiated from a local position. To fix this issue, it is recommended to deploy a patch.

CVSS 4.8 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • libc

    Versions
    • 1.2.0: Affected
    • 1.2.1: Affected
    • 1.2.2: Affected
    • 1.2.3: Affected
    • 1.2.4: Affected
    • 1.2.5: Affected
    • 1.2.6: Affected

    No fix published

  • musl Debian:12

    Versions
    • 1.2.3-1
    • 1.2.4-1
    • 1.2.4-2
    • 1.2.5-1
    • 1.2.5-1.1
    • 1.2.5-2
    • 1.2.5-3
    • 1.2.5-3.1
    • 1.2.5-3.1~deb13u1
    • 1.2.6-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Debian:13

    Versions
    • 1.2.5-3
    Affected ranges
    • ECOSYSTEM: < 1.2.5-3.1~deb13u1

    Update to 1.2.5-3.1~deb13u1

  • musl Debian:14

    Versions
    • 1.2.5-3
    • 1.2.5-3.1~deb13u1
    Affected ranges
    • ECOSYSTEM: < 1.2.5-3.1

    Update to 1.2.5-3.1

  • musl Ubuntu:Pro:14.04:LTS

    Versions
    • 0.9.14-2
    • 0.9.14-2ubuntu1
    • 0.9.15-1
    • 0.9.15-1ubuntu0.1~esm1
    • 0.9.15-1ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:Pro:16.04:LTS

    Versions
    • 1.1.9-1
    • 1.1.9-1ubuntu0.1~esm2
    • 1.1.9-1ubuntu0.1~esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:Pro:18.04:LTS

    Versions
    • 1.1.16-3
    • 1.1.18-1
    • 1.1.19-1
    • 1.1.19-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:Pro:20.04:LTS

    Versions
    • 1.1.23-2build1
    • 1.1.24-1
    • 1.1.24-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:22.04:LTS

    Versions
    • 1.2.2-1
    • 1.2.2-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:24.04:LTS

    Versions
    • 1.2.3-1
    • 1.2.4-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:25.10

    Versions
    • 1.2.5-2
    • 1.2.5-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:26.10

    Versions
    • 1.2.5-3build1
    • 1.2.6-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • musl Ubuntu:26.04:LTS

    Versions
    • 1.2.5-3
    • 1.2.5-3build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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