Memory leak in the gk_circuit_info_do_in_acf function in the H.323 implementation in Cisco IOS before 15.0(1)XA allows remote attackers to…

published 2011-01-07 15y ago modified 2026-06-16 4mo ago also EUVD-2009-4997

cvss: 5.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits: 0; none known

Memory leak in the gk_circuit_info_do_in_acf function in the H.323 implementation in Cisco IOS before 15.0(1)XA allows remote attackers to cause a denial of service (memory consumption) via a large number of calls over a long duration, as demonstrated by InterZone Clear Token (IZCT) test traffic, aka Bug ID CSCsz72535.

Patch / fix

fixed in 1

cisco ios 15.0\(1\)xa

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Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-772 Missing Release of Resource after Effective Lifetime

Technology feeds

Cisco IOS rss critical rss

References

cisco.com /en/US/docs/ios/15_0/15_0x/15_01_XA/rn800xa.pdf
release-notes, vendor-advisory
exchange.xforce.ibmcloud.com /vulnerabilities/64731
vdb-entry, third-party-advisory

Sources

CVE List CVE-2009-5039
NVD CVE-2009-5039

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