CVE-2026-82457 PUBLISHED

su-exec through 0.3 fails to validate numeric user and group identifiers parsed with strtol before assigning to uid_t and gid_t, allowing truncation of out-of-range values to zero. Attackers can supply large numeric identifiers that truncate to root's identifier, causing su-exec to execute target programs with root privileges instead of intended unprivileged accounts.

• Ali Firas reporter

• Vulnerable code: su-exec.c (strtol into uid_t without range check)
• Reporter's write-up
• https://github.com/ncopa/su-exec
• VulnCheck Advisory: su-exec through 0.3 Privilege Escalation via Numeric User ID

• Incorrect Conversion between Numeric Types CWE