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CVE-2019-5599
In FreeBSD 12.0-STABLE before r349197 and 12.0-RELEASE before 12.0-RELEASE-p6, a bug in the non-default RACK TCP stack can allow an…
- 7.5HighCVSS base score
- 5.1%Exploitation in 30 daysEPSS · top 7.5% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In FreeBSD 12.0-STABLE before r349197 and 12.0-RELEASE before 12.0-RELEASE-p6, a bug in the non-default RACK TCP stack can allow an attacker to cause several linked lists to grow unbounded and cause an expensive list traversal on every packet being processed, leading to resource exhaustion and a denial of service.
Timeline
ID reserved
By freebsd
- 6 months later
· 6 months later
Published
- 5 years later
· 5 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 | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 5.1% · top 7.5% 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: High 7.5.
Affected products
FreeBSD
- affected FreeBSD 12.0 before 12.0-RELEASE-p6
References
References10
- [oss-security] 20190617 Linux and FreeBSD Kernel: Multiple TCP-based remote denial of service issues (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/153329/Linux-FreeBSD-TCP-Based-Denial-Of-Service.html (opens in a new tab)x_refsource_MISCx_transferred
- FreeBSD-SA-19:08 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- VU#905115 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- 20190624 FreeBSD Security Advisory FreeBSD-SA-19:08.rack (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- http://packetstormsecurity.com/files/153378/FreeBSD-Security-Advisory-FreeBSD-SA-19-08.rack.html (opens in a new tab)x_refsource_MISCx_transferred
- https://support.f5.com/csp/article/K75521003 (opens in a new tab)x_refsource_MISCx_transferred
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193 (opens in a new tab)x_refsource_MISCx_transferred
- https://security.netapp.com/advisory/ntap-20190625-0004/ (opens in a new tab)x_refsource_MISCx_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-2019-15174 (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-2019-5599)Record last updated .