🛡️ CVE-2025-26519 — musl

🟠 CVSS 8.1 — High ✅ No Known Exploit CWE-787 NVD

8.1

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability low.

Weakness class

CVE-2025-26519 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

CVE-2025-26519 is recorded against 1 package.

musl (from 0.9.13 up to 1.2.6)

Timeline and source

Published on 14 February 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.musl-libc.org
git.musl-libc.org
www.openwall.com
www.openwall.com
www.openwall.com
www.openwall.com
www.openwall.com
www.openwall.com
www.openwall.com

CVE-2025-26519 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Alpine BellSoft Debian Ubuntu

Details

Severity HIGH

CVSS Score 8.1

CVSS Vector CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L

CWE CWE-787

Public Exploit ✅ No

Source NVD

Published 2025-02-14

Updated 2026-08-11

Modified 2026-06-17

Fix URL https://git.musl-libc.org/cgit/musl/commit/?id=c47ad25ea3b484e10326f933e927c0bc8cded3da

Affected Packages

Software	From version	Fixed in
musl	0.9.13	1.2.6

References

Patch https://git.musl-libc.org/cgit/musl/commit/?id=c47ad25ea3b484e10326f933e927c0bc8cded3da

Patch https://git.musl-libc.org/cgit/musl/commit/?id=e5adcd97b5196e29991b524237381a0202a60659

Mailing List, Mitigation, Third Party Advisory https://www.openwall.com/lists/oss-security/2025/02/13/2

Mailing List, Mitigation, Third Party Advisory http://www.openwall.com/lists/oss-security/2025/02/13/2

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2025/02/13/3

Mailing List, Mitigation, Third Party Advisory http://www.openwall.com/lists/oss-security/2025/02/13/4

Mailing List, Mitigation, Third Party Advisory http://www.openwall.com/lists/oss-security/2025/02/13/5

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2025/02/14/5

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2025/02/14/6

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

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