8.8
CVE-2026-39461
- EPSS 0.17%
- Veröffentlicht 21.05.2026 10:16:25
- Zuletzt bearbeitet 21.05.2026 19:01:35
- Quelle secteam@freebsd.org
- CVE-Watchlists
- Unerledigt
select(2) file descriptor set overflow causes stack overflow
libcasper(3) communicates with helper processes via UNIX domain sockets, and uses the select(2) system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select(2)'s descriptor set size limit of FD_SETSIZE (1024). An attacker able to cause an application using libcasper(3) to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, may trigger stack corruption. If the target application runs with setuid root privileges, this could be used to escalate local privileges.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
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Login| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.17% | 0.068 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | 8.8 | 2 | 6 |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
|
CWE-121 Stack-based Buffer Overflow
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
https://security.freebsd.org/advisories/FreeBSD-SA-26:22.libcasper.asc