Is CVE-2009-0778 being actively exploited?

CVE-2009-0778 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-0778?

CVE-2009-0778 has a CVSS 2.0 base score of 7.1 (HIGH).

CVE-2009-0778

HIGH · CVSS 7.1EPSS 4.6%EU EUVD

The icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a router with a REJECT route, does not properly manage the Protocol Independent Destination Cache (aka DST) in some situations involving transmission of an ICMP Host Unreachable message, which allows remote attackers to cause a denial of service (connectivity outage) by sending a large series of packets to many destination IP addresses within this REJECT route, related to an "rt_cache leak."

Key facts

CVSS score: 7.1 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:M/Au:N/C:N/I:N/A:C
EPSS score: 4.6% (92th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-0778)
Published: March 12, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-0778 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

linux / linux kernel
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and 308 more…

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7c0ecc4c4f8fd90988aab8a95297b9c0038b6160
http://openwall.com/lists/oss-security/2009/03/11/2(Mailing List, Third Party Advisory)
http://secunia.com/advisories/33758(Broken Link)
http://secunia.com/advisories/37471(Broken Link)
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25(Broken Link)
http://www.redhat.com/support/errata/RHSA-2009-0326.html(Broken Link)
http://www.securityfocus.com/archive/1/507985/100/0/threaded(Third Party Advisory, VDB Entry)
http://www.securityfocus.com/bid/34084(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1021958(Third Party Advisory, VDB Entry)
http://www.vmware.com/security/advisories/VMSA-2009-0016.html(Third Party Advisory)
http://www.vupen.com/english/advisories/2009/3316(Broken Link)
https://bugzilla.redhat.com/show_bug.cgi?id=485163(Exploit, Issue Tracking, Third Party Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/49199(Third Party Advisory, VDB Entry)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10215(Third Party Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7867(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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