docs/openbsd: update found_bugs.md
diff --git a/docs/openbsd/found_bugs.md b/docs/openbsd/found_bugs.md
index f7d9a2a..c8ce602 100644
--- a/docs/openbsd/found_bugs.md
+++ b/docs/openbsd/found_bugs.md
@@ -6,6 +6,8 @@
 
 Newer bugs comes first.
 
+- [bpf(4): unsigned integer wrap around](https://marc.info/?l=openbsd-cvs&m=155621669009140&w=2)
+
 - [vmm(4): `printf()` called from IPI-context](https://marc.info/?l=openbsd-cvs&m=155590526807190&w=2)
 
 - [bpf(4): negative input accepted in `bpfioctl()`](https://marc.info/?l=openbsd-cvs&m=155430843501793&w=2)