CVE-2025-26519
CVE-2025-26519 is a high-severity vulnerability in Musl-libc Musl with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 8.1)
- EPSS exploit prediction: 0% (25th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-4206
- Weakness: CWE-787
- Affected product: Musl-libc Musl
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2025-26519?
- CVE-2025-26519 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
- Is CVE-2025-26519 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-26519?
- CVE-2025-26519 affects Musl-libc Musl. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-26519?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-26519 have an EU (EUVD) identifier?
- Yes. CVE-2025-26519 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4206.
- When was CVE-2025-26519 published?
- CVE-2025-26519 was published on 2025-02-14 and last updated on 2026-06-17.
References
- https://git.musl-libc.org/cgit/musl/commit/?id=c47ad25ea3b484e10326f933e927c0bc8cded3da
- https://git.musl-libc.org/cgit/musl/commit/?id=e5adcd97b5196e29991b524237381a0202a60659
- https://www.openwall.com/lists/oss-security/2025/02/13/2
- http://www.openwall.com/lists/oss-security/2025/02/13/2
- http://www.openwall.com/lists/oss-security/2025/02/13/3
- http://www.openwall.com/lists/oss-security/2025/02/13/4
- http://www.openwall.com/lists/oss-security/2025/02/13/5
- http://www.openwall.com/lists/oss-security/2025/02/14/5
- http://www.openwall.com/lists/oss-security/2025/02/14/6
Affected products (1)
- cpe:2.3:a:musl-libc:musl:*:*:*:*:*:*:*:*
More vulnerabilities in Musl-libc Musl
- CVE-2014-3484 — Critical (CVSS 9.8): Multiple stack-based buffer overflows in the __dn_expand function in network/dn_expand.c in musl libc 1.1x before 1.1.2…
- CVE-2019-14697 — Critical (CVSS 9.8): musl libc through 1.1.23 has an x87 floating-point stack adjustment imbalance, related to the math/i386/ directory. In…
- CVE-2015-1817 — Critical (CVSS 9.8): Stack-based buffer overflow in the inet_pton function in network/inet_pton.c in musl libc 0.9.15 through 1.0.4, and…
- CVE-2017-15650 — High (CVSS 7.5): musl libc before 1.1.17 has a buffer overflow via crafted DNS replies because dns_parse_callback in…
- CVE-2020-28928 — Medium (CVSS 5.5): In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source…
All CVEs affecting Musl-libc Musl →
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