THREATPORT/VULNERABILITY/CVE-2009-4272
HIGH SEVERITY

CVE-2009-4272

Linux Kernel vulnerability

CVSS
7.5
EPSS
11.1%
EPSS pct
95th
Exploited
No known
A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (deadlock) via crafted packets that force collisions in the IPv4 routing hash table, and trigger a routing "emergency" in which a hash chain is too long. NOTE: this is related to an issue in the Linux kernel before 2.6.31, when the kernel routing cache is disabled, involving an uninitialized pointer and a panic.
Affected vendor
Linux
Affected product
Linux Kernel
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2010-01-27

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 11.1% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2009-4272

  • Confirm whether Linux Linux Kernel is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2009-4272.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-4272

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-4272 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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