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CVE-2009-0778

22
FAUCET Score

CVE-2009-0778 describes a denial-of-service vulnerability in the Linux kernel before version 2.6.25, specifically affecting systems configured as routers with REJECT routes. The flaw, related to an "rt_cache leak" in the icmp_send function, impacts Linux, Microsoft, Red Hat, and VMware products. With a CVSS score of 7.1, this vulnerability is considered high severity, allowing remote attackers to cause a connectivity outage with medium attack complexity and no authentication. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.24.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.0:test1:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.0:test10:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.0:test11:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.1HIGH

AV:N/AC:M/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.62%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0462 is in the 56th percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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 (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-128.1.6.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.2 Z StreamFixed in: kernel-0:2.6.18-92.1.35.el5
View patch

Vendor Advisories (1)

redhatCVE-2009-0778Important

kernel: rt_cache leak leads to lack of network connectivity

Mar 26, 2008

References

git.kernel.org
openwall.com / lists/oss-security/2009/03/11/2
Mailing ListThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
ExploitIssue TrackingThird Party Advisory
secunia.com / advisories/33758
Broken Link
secunia.com / advisories/37471
Broken Link
exchange.xforce.ibmcloud.com / vulnerabilities/49199
Third Party AdvisoryVDB Entry
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10215
Third Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7867
Third Party Advisory
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.25
Broken Link
redhat.com / support/errata/RHSA-2009-0326.html
Broken Link
securityfocus.com / archive/1/507985/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/34084
Third Party AdvisoryVDB Entry
securitytracker.com / id
Third Party AdvisoryVDB Entry
vmware.com / security/advisories/VMSA-2009-0016.html
Third Party Advisory
vupen.com / english/advisories/2009/3316
Broken Link