CVE-2019-5597 json
In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a…
published 2019-05-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-15172
- cvss
- 9.1
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.7%
- EPSS 3.7% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in the pf IPv6 fragment reassembly logic incorrectly uses the last extension header offset from the last received packet instead of the first packet allowing maliciously crafted IPv6 packets to cause a crash or potentially bypass the packet filter.
Patch / fix
Exploit prediction
3.66% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- synacktiv.com https://www.synacktiv.com/ressources/Synacktiv_OpenBSD_PacketFilter_CVE-2019-5597_ipv6_frag.pdf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:N/I:P/A:P |
Affected products
- n/a FreeBSD
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
security.freebsd.org
/advisories/FreeBSD-SA-19:05.pf.asc
patch, vendor-advisory
-
synacktiv.com
/ressources/Synacktiv_OpenBSD_PacketFilter_CVE-2019-5597_ipv6_frag.pdf
exploit, third-party-advisory
-
packetstormsecurity.com
/files/152933/FreeBSD-Security-Advisory-FreeBSD-SA-19-05.pf.html
third-party-advisory, vdb-entry
-
securityfocus.com
/bid/108395
vdb-entry
- security.netapp.com /advisory/ntap-20190611-0001/
- oracle.com /technetwork/security-advisory/cpujul2019-5072835.html
Sources
- CVE List CVE-2019-5597
- NVD CVE-2019-5597
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.