What is CVE-2025-26519?

CVE-2025-26519 is a high-severity vulnerability in Musl-libc Musl, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2025-02-14.

How severe is CVE-2025-26519?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2025-26519 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Musl-libc Musl

CVE-2025-26519

musl libc 0.9.13 through 1.2.5 before 1.2.6 has an out-of-bounds write vulnerability when an attacker can trigger iconv conversion of untrusted EUC-KR text to UTF-8.

Vulnerability class: Buffer Overflow

EPSS: 0.000 (10.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L.

Affected products

Musl-libc Musl — versions 0.9.13

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

peek8/conscan

References

Frequently asked questions

What is CVE-2025-26519?: CVE-2025-26519 is a high-severity vulnerability in Musl-libc Musl, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2025-02-14.
How severe is CVE-2025-26519?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2025-26519 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.