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    CVE-2007-0556

    The query planner in PostgreSQL before 8.0.11, 8.1 before 8.1.7, and 8.2 before 8.2.2 does not verify that a table is compatible with a "previously made query plan," which allows remote authenticated users to cause a denial of service (server crash) and possibly access database content via an "ALTER COLUMN TYPE" SQL statement, which can be leveraged to read arbitrary memory from the server.

    Published:Feb 5, 2007
    Last Modified:Apr 23, 2026
    EPS:Feb 6, 2007
    EPSS Score:0.0194
    CVSS Score:6.6

    Affected Products

    Vendor
    Postgresql
    Product
    Postgresql
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Application Stack

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-14671 (CVSS 8.8) — Type confusion in PostgreSQL module "refint" allows an object creator to execute arbitrary code as the operati…
    CVE-2026-6471 (CVSS 7.2) — Missing authorization in PostgreSQL logical decoding allows a non-superuser holding REPLICATION privilege to d…
    CVE-2026-6470 (CVSS 4.3) — Missing authorization in PostgreSQL DDL commands allows an object creator to achieve denial of service against…
    CVE-2026-6469 (CVSS 3.8) — Incorrect ownership assignment in PostgreSQL ALTER TABLE ALTER TYPE command reassigns ownership of dependent s…
    CVE-2026-6464 (CVSS 8.1) — Untrusted data inclusion in PostgreSQL psql COPY may allow a server administrator to elicit execution of data …
    CVE-2026-19385 (CVSS 8.8) — Heap buffer overflow in PostgreSQL pg_dump of long function transform lists allows an object creator to execut…
    CVE-2026-18408 (CVSS 8.8) — Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject …
    CVE-2026-18024 (CVSS 4.3) — Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a…
    CVE-2026-16241 (CVSS 3.8) — Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of ser…
    CVE-2026-16239 (CVSS 8.8) — Type confusion in PostgreSQL "portal"/cursor lifecycle allows a user to execute arbitrary code as the operatin…

    References

    http://fedoranews.org/cms/node/2554
    http://lists.rpath.com/pipermail/security-announce/2007-February/000141.html
    http://osvdb.org/33302
    http://secunia.com/advisories/24028
    http://secunia.com/advisories/24033
    http://secunia.com/advisories/24042
    http://secunia.com/advisories/24050
    http://secunia.com/advisories/24057
    http://secunia.com/advisories/24151
    http://secunia.com/advisories/24315
    http://secunia.com/advisories/24513
    http://secunia.com/advisories/24577
    http://secunia.com/advisories/25220
    http://security.gentoo.org/glsa/glsa-200703-15.xml
    http://securitytracker.com/id?1017597
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102825-1
    http://support.avaya.com/elmodocs2/security/ASA-2007-117.htm
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:037
    http://www.novell.com/linux/security/advisories/2007_10_sr.html
    http://www.postgresql.org/support/security
    http://www.redhat.com/support/errata/RHSA-2007-0067.html
    http://www.redhat.com/support/errata/RHSA-2007-0068.html
    http://www.securityfocus.com/archive/1/459280/100/0/threaded
    http://www.securityfocus.com/archive/1/459448/100/0/threaded
    http://www.securityfocus.com/bid/22387
    http://www.trustix.org/errata/2007/0007
    http://www.ubuntu.com/usn/usn-417-2
    http://www.vupen.com/english/advisories/2007/0478
    http://www.vupen.com/english/advisories/2007/0774
    https://exchange.xforce.ibmcloud.com/vulnerabilities/32191
    https://issues.rpath.com/browse/RPL-1025
    https://issues.rpath.com/browse/RPL-830
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11353
    https://usn.ubuntu.com/417-1/
    http://fedoranews.org/cms/node/2554
    http://lists.rpath.com/pipermail/security-announce/2007-February/000141.html
    http://osvdb.org/33302
    http://secunia.com/advisories/24028
    http://secunia.com/advisories/24033
    http://secunia.com/advisories/24042
    http://secunia.com/advisories/24050
    http://secunia.com/advisories/24057
    http://secunia.com/advisories/24151
    http://secunia.com/advisories/24315
    http://secunia.com/advisories/24513
    http://secunia.com/advisories/24577
    http://secunia.com/advisories/25220
    http://security.gentoo.org/glsa/glsa-200703-15.xml
    http://securitytracker.com/id?1017597
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-102825-1
    http://support.avaya.com/elmodocs2/security/ASA-2007-117.htm
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:037
    http://www.novell.com/linux/security/advisories/2007_10_sr.html
    http://www.postgresql.org/support/security
    http://www.redhat.com/support/errata/RHSA-2007-0067.html
    http://www.redhat.com/support/errata/RHSA-2007-0068.html
    http://www.securityfocus.com/archive/1/459280/100/0/threaded
    http://www.securityfocus.com/archive/1/459448/100/0/threaded
    http://www.securityfocus.com/bid/22387
    http://www.trustix.org/errata/2007/0007
    http://www.ubuntu.com/usn/usn-417-2
    http://www.vupen.com/english/advisories/2007/0478
    http://www.vupen.com/english/advisories/2007/0774
    https://exchange.xforce.ibmcloud.com/vulnerabilities/32191
    https://issues.rpath.com/browse/RPL-1025
    https://issues.rpath.com/browse/RPL-830
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11353
    https://usn.ubuntu.com/417-1/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High