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TI-2019-06076 Aliases CVE-2019-8460GHSA-9q38-5hh6-p5gw

OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that…

Priority LOW 37CWE-1049Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.02253 83rd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—OpenBSDAll, including latest - 6.5—No fix listedCNA
  • OpenBSD Vendor— Affected All, including latest - 6.5 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*up to 6.5VulnerableOpenBSD
  • cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:* Versions up to 6.5 Vulnerable ·OpenBSD

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-8460
  2. 2026-10-03 Alias added: GHSA-9q38-5hh6-p5gw

References

Exploit 2

Patch 1

Advisory 1

Other 1

  • TI-2002-00376 Integer overflow in xdr_array function in RPC servers for operating systems that use… CVSS 3.1CRITICAL 9.8
  • TI-2003-00437 Off-by-one error in the fb_realpath() function, as derived from the realpath function in… CVSS 3.1CRITICAL 9.8
  • TI-2007-05153 Stack-based buffer overflow in the cons_options function in options.c in dhcpd in OpenBSD… CVSS 2.0HIGH 7.2
  • TI-2001-00539 Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows… CVSS 2.0HIGH 10.0
  • TI-2026-40218 sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication… CVSS 3.1HIGH 8.3
  • TI-2004-00444 Heap-based buffer overflow in proxy_util.c for mod_proxy in Apache 1.3.25 to 1.3.31… CVSS 2.0HIGH 10.0
See all 200 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences