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Fencer Vulns
high 7.1

CVE-2008-4609 in the critical feed json

The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operati…

published 2008-10-20 18 y ago modified 2026-06-16 4 mo ago also EUVD-2008-4589

cvss
7.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
32.4%
EPSS 32.4% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operating systems allows remote attackers to cause a denial of service (connection queue exhaustion) via multiple vectors that manipulate information in the TCP state table, as demonstrated by sockstress.

Patch / fix

  • cisco catalyst_blade_switch_3020_firmware 12.2\(50\)
  • cisco catalyst_blade_switch_3120_firmware 12.2\(50\)
  • cisco catalyst_blade_switch_3120x_firmware 12.2\(50\)
  • kernel CBL-Mariner 2.0 5.10.78.1-1

azure linux advisories AZL-6513

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2008-4609 updated

kernel: TCP protocol vulnerabilities from Outpost24

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

32.35% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
Technology feeds

References

Sources

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.