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).
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Freebsd | Freebsd | 5.3 (including) | 5.3 (including) |
| Freebsd | Freebsd | 5.4 (including) | 5.4 (including) |
| Kfreebsd-5 | Ubuntu | dapper | * |
| Kfreebsd-5 | Ubuntu | edgy | * |
| Kfreebsd-5 | Ubuntu | feisty | * |
| Kfreebsd-5 | Ubuntu | gutsy | * |
| Kfreebsd-5 | Ubuntu | hardy | * |
| Kfreebsd-5 | Ubuntu | intrepid | * |