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CVE-2006-0433
Selective Acknowledgement (SACK) in FreeBSD 5.3 and 5.4 does not properly handle an incoming selective acknowledgement when there is…
- 5.0MediumCVSS base score
- 2.9%Exploitation in 30 daysEPSS · top 13% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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).
Timeline
ID reserved
By freebsd
- 8 days later
· 8 days later
Published
- 19 years later
· 19 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 2.9% · top 13% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
7
- ADV-2006-0409 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 22861 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 16466 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 1015566 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 399 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- bsd-sack-handling-dos(24453) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 18696 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2006-0440 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2006-0433)Record last updated .