PT-2026-31904 · Musl Libc · Musl Libc

0X001 · Published 2026-04-10 · Updated 2026-05-03 · CVE-2026-6042

Positive Technologies (AI Summary)

CVSS v4.0

4.8

Medium

Base vector

AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions musl libc versions up to 1.2.6

Description A security flaw exists in the iconv function within the GB18030 4-byte Decoder component of musl libc, specifically in the file src/locale/iconv.c. A manipulation of this function leads to inefficient algorithmic complexity. The attack requires local access.

Recommendations Deploy a patch to address this issue.

Fix

Improper Resource Release

Weakness Enumeration

CWE-404

CWE-407

Related Identifiers

CVE-2026-6042

ECHO-7274-4B19-C757

OESA-2026-1927

OESA-2026-1928

OESA-2026-2087

OESA-2026-2088

OESA-2026-2178

Affected Products

Musl Libc

References · 29

• https://osv.dev/vulnerability/OESA-2026-1927 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40200 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-6042 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-1928 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-6042 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2087 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2088 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6042 · Security Note
• https://osv.dev/vulnerability/ALPINE-CVE-2026-6042 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-6042 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-6042 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-6042 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6042 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2178 · Vendor Advisory
• https://openwall.com/lists/oss-security/2026/04/03/2 · Patch