CVE-2025-71263
7.4 HIGHIn UNIX Fourth Research Edition (v4), the su command is vulnerable to a buffer overflow due to the 'password' variable having a fixed siz...
Published: 2026-03-13 · Last updated: 2026-06-11
Severity and scoring
- CVSS
- 7.4 HIGH
- Vector
- CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-120
Affected products
| Vendor | Product |
|---|---|
| opengroup | unix |
Description
In UNIX Fourth Research Edition (v4), the su command is vulnerable to a buffer overflow due to the 'password' variable having a fixed size of 100 bytes. A local user can exploit this to gain root privileges. It is unlikely that UNIX v4 is running anywhere outside of a very small number of lab environments. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2025-71263
- [Other]https://discuss.systems/@ricci/115747843169814700
- [Other]https://sigma-star.at/blog/2025/12/unix-v4-buffer-overflow/
- [Other]https://www.spinellis.gr/blog/20251223/
- [Other]https://www.tuhs.org/pipermail/tuhs/2026-January/032991.html
- [Other]http://www.openwall.com/lists/oss-security/2026/03/20/6
- [Other]http://www.openwall.com/lists/oss-security/2026/03/21/4
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