Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2019-8460

20
FAUCET Score

CVE-2019-8460 describes a denial-of-service vulnerability in OpenBSD kernel versions 6.5 and earlier. An attacker can force the kernel to create excessively long TCP SACK chains, leading to resource-intensive processing of incoming SACK packets. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity to achieve a complete denial of service. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.5CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.19%
Probability of exploitation in next 30 days
EPSS Percentile
80.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0219 is in the 66th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

ftp.openbsd.org / pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig
ExploitVendor Advisory
github.com / openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f
PatchThird Party Advisory
research.checkpoint.com / tcp-sack-security-issue-in-openbsd-cve-2019-8460
ExploitPatchPress/Media CoverageThird Party Advisory
security.netapp.com / advisory/ntap-20190905-0001
Third Party Advisory
us-cert.cisa.gov / ics/advisories/icsa-19-253-03