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01 Record

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

UnratedPUBLISHEDCNA: checkpoint
CNA base scoreUnratedNo CNA CVSS vector
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02 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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
2.25% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 82.4% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2019-08-26 19:18Z7 YR AGO
Last updated
2024-08-04 21:17Z2 YR AGO
Reserved
2019-02-18
Assigning CNA
checkpoint
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-1049Excessive Data Query Operations in a Large Data TableBase
Data version
5.1
Document digest
76113b634d4818ed7e06d9eed35f67e6bb9f1e7c2c64a0007d538fc330d0b61b

05 Affected products

VendorProductVersionsPlatforms
n/aOpenBSDAll, including latest - 6.5—

06 References