Out-of-bounds write in musl libc - CVE-2025-26519
Published: March 7, 2025
Vulnerability identifier: #VU105451
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-26519
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when converting untrusted EUC-KR text to UTF-8. A remote attacker can pass specially crafted data to the application, trigger an out-of-bounds write and execute arbitrary code on the target system.
Affected software
musl libc
IBM Concert Software
openEuler
musl-debuginfo
musl
musl-libc-static
musl-libc
musl-gcc
musl-devel
musl-debugsource
IBM Concert Software
openEuler
musl-debuginfo
musl
musl-libc-static
musl-libc
musl-gcc
musl-devel
musl-debugsource
How to mitigate CVE-2025-26519
Install updates from vendor's website.
IBM Concert Software - update to 2.0.0
musl-debuginfo - addressed in versions 1.2.3-3, 1.2.4-4
musl - addressed in versions 1.2.3-3, 1.2.4-4
musl-libc-static - addressed in versions 1.2.3-3, 1.2.4-4
musl-libc - addressed in versions 1.2.3-3, 1.2.4-4
musl-gcc - addressed in versions 1.2.3-3, 1.2.4-4
musl-devel - addressed in versions 1.2.3-3, 1.2.4-4
musl-debugsource - addressed in versions 1.2.3-3, 1.2.4-4
musl-debuginfo - addressed in versions 1.2.3-3, 1.2.4-4
musl - addressed in versions 1.2.3-3, 1.2.4-4
musl-libc-static - addressed in versions 1.2.3-3, 1.2.4-4
musl-libc - addressed in versions 1.2.3-3, 1.2.4-4
musl-gcc - addressed in versions 1.2.3-3, 1.2.4-4
musl-devel - addressed in versions 1.2.3-3, 1.2.4-4
musl-debugsource - addressed in versions 1.2.3-3, 1.2.4-4
External References
- 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
- 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