Selective Acknowledgement (SACK) in FreeBSD 5.3 and 5.4 does not properly handle an incoming selective acknowledgement when there is insufficient memory, which might allow remote attackers to cause a denial of service (infinite loop).
| Software | From | Fixed in |
|---|---|---|
| freebsd / freebsd | 5.4 | 5.4.x |
| freebsd / freebsd | 5.3 | 5.3.x |