CVE-2009-0778

Exp

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."

Published: 2009-03-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0778 is rated High Exploit Risk (78.2/100): CVSS High severity, with high exploitation likelihood (EPSS 4.62%, 90th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.14% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-0778

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-0778

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.48% 4.62% +3.14%
2 2025-11-25 1.65% 1.48% -0.17%
3 2025-06-23 — 1.65% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0778

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 2.0 HIGH
AV:N/AC:M/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 6.9 [email protected]

Weakness enumeration for CVE-2009-0778

OS Trackers for CVE-2009-0778

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2009-0778
ubuntu medium CVE-2009-0778 medium priority: Ubuntu including 3 source packages (linux, linux-source-2.6.15, linux-source-2.6.22), 18 status rows across 6 suites (dapper, gutsy, hardy, intrepid, jaunty, upstream): DNE 10, not-affected 4, needs-triage 3, ignored 1. https://ubuntu.com/security/CVE-2009-0778

Vendor comments (NVD) for CVE-2009-0778

  • Red Hat (2009-05-19T00:00:00)

    This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and Red Hat Enterprise MRG. It was addressed in Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2009-0326.html .

Affected software / configurations for CVE-2009-0778

Vendor Product Version Raw CPE
linux linux_kernel <= 2.6.24.7 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test1:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test10:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test11:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test2:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test3:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test4:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test5:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test6:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test7:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test8:*:*:*:*:*:*
linux linux_kernel 2.6.0 cpe:2.3:o:linux:linux_kernel:2.6.0:test9:*:*:*:*:*:*
linux linux_kernel 2.6.1 cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:*
linux linux_kernel 2.6.1 cpe:2.3:o:linux:linux_kernel:2.6.1:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.1 cpe:2.3:o:linux:linux_kernel:2.6.1:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.1 cpe:2.3:o:linux:linux_kernel:2.6.1:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.2 cpe:2.3:o:linux:linux_kernel:2.6.2:*:*:*:*:*:*:*
linux linux_kernel 2.6.2 cpe:2.3:o:linux:linux_kernel:2.6.2:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.2 cpe:2.3:o:linux:linux_kernel:2.6.2:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.2 cpe:2.3:o:linux:linux_kernel:2.6.2:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.3 cpe:2.3:o:linux:linux_kernel:2.6.3:*:*:*:*:*:*:*
linux linux_kernel 2.6.3 cpe:2.3:o:linux:linux_kernel:2.6.3:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.3 cpe:2.3:o:linux:linux_kernel:2.6.3:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.3 cpe:2.3:o:linux:linux_kernel:2.6.3:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.3 cpe:2.3:o:linux:linux_kernel:2.6.3:rc4:*:*:*:*:*:*
linux linux_kernel 2.6.4 cpe:2.3:o:linux:linux_kernel:2.6.4:*:*:*:*:*:*:*
linux linux_kernel 2.6.4 cpe:2.3:o:linux:linux_kernel:2.6.4:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.4 cpe:2.3:o:linux:linux_kernel:2.6.4:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.4 cpe:2.3:o:linux:linux_kernel:2.6.4:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.5 cpe:2.3:o:linux:linux_kernel:2.6.5:*:*:*:*:*:*:*
linux linux_kernel 2.6.5 cpe:2.3:o:linux:linux_kernel:2.6.5:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.5 cpe:2.3:o:linux:linux_kernel:2.6.5:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.5 cpe:2.3:o:linux:linux_kernel:2.6.5:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.6 cpe:2.3:o:linux:linux_kernel:2.6.6:*:*:*:*:*:*:*
linux linux_kernel 2.6.6 cpe:2.3:o:linux:linux_kernel:2.6.6:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.6 cpe:2.3:o:linux:linux_kernel:2.6.6:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.6 cpe:2.3:o:linux:linux_kernel:2.6.6:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.7 cpe:2.3:o:linux:linux_kernel:2.6.7:*:*:*:*:*:*:*
linux linux_kernel 2.6.7 cpe:2.3:o:linux:linux_kernel:2.6.7:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.7 cpe:2.3:o:linux:linux_kernel:2.6.7:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.7 cpe:2.3:o:linux:linux_kernel:2.6.7:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.8 cpe:2.3:o:linux:linux_kernel:2.6.8:*:*:*:*:*:*:*
linux linux_kernel 2.6.8 cpe:2.3:o:linux:linux_kernel:2.6.8:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.8 cpe:2.3:o:linux:linux_kernel:2.6.8:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.8 cpe:2.3:o:linux:linux_kernel:2.6.8:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.8 cpe:2.3:o:linux:linux_kernel:2.6.8:rc4:*:*:*:*:*:*
linux linux_kernel 2.6.8.1 cpe:2.3:o:linux:linux_kernel:2.6.8.1:*:*:*:*:*:*:*
linux linux_kernel 2.6.9 cpe:2.3:o:linux:linux_kernel:2.6.9:*:*:*:*:*:*:*
linux linux_kernel 2.6.9 cpe:2.3:o:linux:linux_kernel:2.6.9:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.9 cpe:2.3:o:linux:linux_kernel:2.6.9:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.9 cpe:2.3:o:linux:linux_kernel:2.6.9:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.9 cpe:2.3:o:linux:linux_kernel:2.6.9:rc4:*:*:*:*:*:*
linux linux_kernel 2.6.10 cpe:2.3:o:linux:linux_kernel:2.6.10:*:*:*:*:*:*:*
linux linux_kernel 2.6.10 cpe:2.3:o:linux:linux_kernel:2.6.10:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.10 cpe:2.3:o:linux:linux_kernel:2.6.10:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.10 cpe:2.3:o:linux:linux_kernel:2.6.10:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.11 cpe:2.3:o:linux:linux_kernel:2.6.11:*:*:*:*:*:*:*
linux linux_kernel 2.6.11 cpe:2.3:o:linux:linux_kernel:2.6.11:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.11 cpe:2.3:o:linux:linux_kernel:2.6.11:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.11 cpe:2.3:o:linux:linux_kernel:2.6.11:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.11 cpe:2.3:o:linux:linux_kernel:2.6.11:rc4:*:*:*:*:*:*
linux linux_kernel 2.6.11 cpe:2.3:o:linux:linux_kernel:2.6.11:rc5:*:*:*:*:*:*
linux linux_kernel 2.6.11.1 cpe:2.3:o:linux:linux_kernel:2.6.11.1:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.2 cpe:2.3:o:linux:linux_kernel:2.6.11.2:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.3 cpe:2.3:o:linux:linux_kernel:2.6.11.3:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.4 cpe:2.3:o:linux:linux_kernel:2.6.11.4:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.5 cpe:2.3:o:linux:linux_kernel:2.6.11.5:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.6 cpe:2.3:o:linux:linux_kernel:2.6.11.6:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.7 cpe:2.3:o:linux:linux_kernel:2.6.11.7:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.8 cpe:2.3:o:linux:linux_kernel:2.6.11.8:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.9 cpe:2.3:o:linux:linux_kernel:2.6.11.9:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.10 cpe:2.3:o:linux:linux_kernel:2.6.11.10:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.11 cpe:2.3:o:linux:linux_kernel:2.6.11.11:*:*:*:*:*:*:*
linux linux_kernel 2.6.11.12 cpe:2.3:o:linux:linux_kernel:2.6.11.12:*:*:*:*:*:*:*
linux linux_kernel 2.6.12 cpe:2.3:o:linux:linux_kernel:2.6.12:*:*:*:*:*:*:*
linux linux_kernel 2.6.12 cpe:2.3:o:linux:linux_kernel:2.6.12:rc1:*:*:*:*:*:*
linux linux_kernel 2.6.12 cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
linux linux_kernel 2.6.12 cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.12 cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*

References for CVE-2009-0778

URL Tags
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
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