How severe is CVE-2012-3868?

CVE-2012-3868 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-3868 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-3868?

CVE-2012-3868 primarily affects Isc Bind. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-3868?

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

When was CVE-2012-3868 published?

CVE-2012-3868 was published on 2012-07-25 and last updated on 2026-06-16.

CVE-2012-3868

CVE-2012-3868 is a medium-severity vulnerability in Isc Bind with a CVSS 2.0 base score of 4.3. 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-362.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Isc Bind
Published: 2012-07-25
Last modified: 2026-06-16

Description

Race condition in the ns_client structure management in ISC BIND 9.9.x before 9.9.1-P2 allows remote attackers to cause a denial of service (memory consumption or process exit) via a large volume of TCP queries.

Frequently asked questions

What is CVE-2012-3868?: Race condition in the ns_client structure management in ISC BIND 9.9.x before 9.9.1-P2 allows remote attackers to cause a denial of service (memory consumption or process exit) via a large volume of TCP queries.
How severe is CVE-2012-3868?: CVE-2012-3868 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-3868 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3868?: CVE-2012-3868 primarily affects Isc Bind. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-3868?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-3868 published?: CVE-2012-3868 was published on 2012-07-25 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:isc:bind:9.9.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:a1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:a2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:a3:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:b1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:b2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:rc2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:rc3:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.0:rc4:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.1:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.9.1:p1:*:*:*:*:*:*

More vulnerabilities in Isc Bind

CVE-2008-0122 — Critical (CVSS 10.0): Off-by-one error in the inet_network function in libbind in ISC BIND 9.4.2 and earlier, as used in libc in FreeBSD 6.2…
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CVE-1999-0837 — Critical (CVSS 10.0): Denial of service in BIND by improperly closing TCP sessions via so_linger.

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Other CWE-362 (Race Condition) vulnerabilities

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CVE-2010-1228 — Critical (CVSS 10.0): Multiple race conditions in the sandbox infrastructure in Google Chrome before 4.1.249.1036 have unspecified impact and…
CVE-2008-6598 — Critical (CVSS 10.0): Multiple race conditions in WANPIPE before 3.3.6 have unknown impact and attack vectors related to "bri restart logic."
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