How severe is CVE-2009-5009?

CVE-2009-5009 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-5009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-5009?

CVE-2009-5009 primarily affects Infradead Openconnect. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-5009?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-5009 published?

CVE-2009-5009 was published on 2010-10-14 and last updated on 2026-06-16.

CVE-2009-5009

CVE-2009-5009 is a medium-severity vulnerability in Infradead Openconnect with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Infradead Openconnect
Published: 2010-10-14
Last modified: 2026-06-16

Description

Double free vulnerability in OpenConnect before 1.40 might allow remote AnyConnect SSL VPN servers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted DTLS Cipher option during a reconnect operation.

Frequently asked questions

What is CVE-2009-5009?: Double free vulnerability in OpenConnect before 1.40 might allow remote AnyConnect SSL VPN servers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted DTLS Cipher option during a reconnect operation.
How severe is CVE-2009-5009?: CVE-2009-5009 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-5009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-5009?: CVE-2009-5009 primarily affects Infradead Openconnect. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-5009?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-5009 published?: CVE-2009-5009 was published on 2010-10-14 and last updated on 2026-06-16.

References

http://www.infradead.org/openconnect.html

Affected products (4)

cpe:2.3:a:infradead:openconnect:*:*:*:*:*:*:*:*
cpe:2.3:a:infradead:openconnect:1.00:*:*:*:*:*:*:*
cpe:2.3:a:infradead:openconnect:1.10:*:*:*:*:*:*:*
cpe:2.3:a:infradead:openconnect:1.20:*:*:*:*:*:*:*

More vulnerabilities in Infradead Openconnect

CVE-2020-12823 — Critical (CVSS 9.8): OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other…
CVE-2013-7098 — Critical (CVSS 9.8): OpenConnect VPN client with GnuTLS before 5.02 contains a heap overflow if MTU is increased on reconnection.
CVE-2019-16239 — Critical (CVSS 9.8): process_http_response in OpenConnect before 8.05 has a Buffer Overflow when a malicious server uses HTTP chunked…
CVE-2012-3291 — High (CVSS 7.8): Heap-based buffer overflow in OpenConnect 3.18 allows remote servers to cause a denial of service via a crafted…
CVE-2010-3901 — Medium (CVSS 6.4): OpenConnect before 2.25 does not properly validate X.509 certificates, which allows man-in-the-middle attackers to…
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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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