CVE-2019-8460
CVSS v3
7.5
HIGH
EPSS Score
2.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.
Technical details
- Published
- 2019-08-26
Frequently asked questions
What is CVE-2019-8460?
OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.
Is CVE-2019-8460 actively exploited?
Active exploitation of CVE-2019-8460 has not been confirmed. Its EPSS score was 2.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-8460?
CVE-2019-8460 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2019-8460 affecting your environment?
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