CVE-2009-3527
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to...
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.
Exploit likelihood
What each source reports
NVD Score used
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.
- Record
CVE-2009-3527- CVSS 2.0
- 6.9 Medium
AV:L/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-362
- Updated
- 2026-11-02
CVE List No score
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.
- Record
CVE-2009-3527- Updated
- 2026-11-02
EUVDEUVD-2009-3509 No score
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.
- Record
EUVD-2009-3509- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4c32-x28m-p8h3 No score
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to...
Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.
- Record
GHSA-4c32-x28m-p8h3- Weakness
- CWE-362
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | FreeBSD 6.4 - 'pipeclose()'/'knlist_cleardel()' Race Condition | 2009-10-08 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-3527 is a medium vulnerability (CVSS 6.9) in Freebsd, published October 6, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.55%, the 46th percentile. No source names a fixed version.