How severe is CVE-2004-0836?

CVE-2004-0836 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2004-0836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0836?

CVE-2004-0836 primarily affects Oracle Mysql. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0836?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2004-0836 published?

CVE-2004-0836 was published on 2004-11-03 and last updated on 2026-06-16.

CVE-2004-0836

CVE-2004-0836 is a critical-severity vulnerability in Oracle Mysql with a CVSS 2.0 base score of 10.0. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Oracle Mysql
Published: 2004-11-03
Last modified: 2026-06-16

Description

Buffer overflow in the mysql_real_connect function in MySQL 4.x before 4.0.21, and 3.x before 3.23.49, allows remote DNS servers to cause a denial of service and possibly execute arbitrary code via a DNS response with a large address length (h_length).

Frequently asked questions

What is CVE-2004-0836?: Buffer overflow in the mysql_real_connect function in MySQL 4.x before 4.0.21, and 3.x before 3.23.49, allows remote DNS servers to cause a denial of service and possibly execute arbitrary code via a DNS response with a large address length (h_length).
How severe is CVE-2004-0836?: CVE-2004-0836 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2004-0836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0836?: CVE-2004-0836 primarily affects Oracle Mysql. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0836?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2004-0836 published?: CVE-2004-0836 was published on 2004-11-03 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:3.0:*:*:*:*:*:*:*

More vulnerabilities in Oracle Mysql

CVE-2012-2750 — Critical (CVSS 10.0): Unspecified vulnerability in MySQL 5.5.x before 5.5.23 has unknown impact and attack vectors related to a "Security…
CVE-2020-11656 — Critical (CVSS 9.8): In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause…
CVE-2019-14540 — Critical (CVSS 9.8): A Polymorphic Typing issue was discovered in FasterXML jackson-databind before 2.9.10. It is related to…
CVE-2016-9843 — Critical (CVSS 9.8): The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via…
CVE-2016-9841 — Critical (CVSS 9.8): inffast.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper…
CVE-2016-6662 — Critical (CVSS 9.8): Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB before 5.5.51, 10.0.x before…

All CVEs affecting Oracle Mysql →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →