{"schemaVersion":3,"id":"CVE-2026-88816","aliases":["UBUNTU-CVE-2026-88816","DEBIAN-CVE-2026-88816"],"status":"published","duplicateOf":null,"title":"DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName","description":"DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName.\n\nfetchrow_hashref uses the string pointer of the FetchHashKeyName attribute as the key name without stringifying it first. When FetchHashKeyName has been set to an integer (IV) or floating-point (NV) value, that pointer is invalid, so reading the key name triggers a segmentation fault.\n\nThis can be triggered with the following code:\n\n   my $dbh = DBI->connect( \"dbi:ExampleP:\", \"\", \"\",\n       { RaiseError => 0, PrintError => 0 } );\n   $dbh->{FetchHashKeyName} = 42;\n\n   my $sth = $dbh->prepare(\"select mode, size, name from .\");\n   $sth->execute;\n   $sth->fetchrow_hashref;","dates":{"published":"2026-09-28T16:04:40.458Z","modified":"2026-09-30T19:51:20.177Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":10,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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of Resource Using Incompatible Type ('Type Confusion')","description":"The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/843.html"}],"affected":[{"vendor":"debian","product":"libdbi-perl","name":"libdbi-perl","label":"libdbi-perl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libdbi-perl","purlType":"deb","versions":[{"text":"< 1.643-4+deb12u3","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.654-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.643-4+deb12u3 | All versions (No fix recorded) | < 1.654-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libdbi-perl","name":"libdbi-perl","label":"libdbi-perl","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libdbi-perl","purlType":"deb","versions":[{"text":"< 1.630-1ubuntu0.1~esm9","noFixRecorded":false,"fixedIn":null},{"text":"< 1.634-1ubuntu0.2+esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 1.640-1ubuntu0.3+esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.643-1ubuntu0.1+esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.643-3ubuntu0.4","noFixRecorded":false,"fixedIn":null},{"text":"< 1.643-4ubuntu0.4","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.647-1ubuntu0.26.04.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.630-1ubuntu0.1~esm9 | < 1.634-1ubuntu0.2+esm5 | < 1.640-1ubuntu0.3+esm4 | < 1.643-1ubuntu0.1+esm4 | < 1.643-3ubuntu0.4 | < 1.643-4ubuntu0.4 | All versions (No fix recorded) | < 1.647-1ubuntu0.26.04.4","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/perl5-dbi/dbi/security/advisories/GHSA-f4qx-mr9m-q2hq","label":"github.com/perl5-dbi/dbi/security/advisories/GHSA-f4qx-mr9m-q2hq","hostname":"github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/perl5-dbi/dbi/commit/70962570212dc60a5428098cf2a0462ad5945851.patch","label":"github.com/perl5-dbi/dbi/commit/70962570212dc60a5428098cf2a0462ad5945851.patch","hostname":"github.com","tags":["Patch"]},{"url":"https://metacpan.org/release/HMBRAND/DBI-1.654/changes","label":"metacpan.org/release/HMBRAND/DBI-1.654/changes","hostname":"metacpan.org","tags":["Release Notes"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/28/13","label":"www.openwall.com/lists/oss-security/2026/09/28/13","hostname":"www.openwall.com","tags":[]},{"url":"https://ubuntu.com/security/CVE-2026-88816","label":"ubuntu.com/security/CVE-2026-88816","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88816","label":"www.cve.org/CVERecord?id=CVE-2026-88816","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8912-1","label":"ubuntu.com/security/notices/USN-8912-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-88816","label":"security-tracker.debian.org/tracker/CVE-2026-88816","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88816","label":"nvd.nist.gov/vuln/detail/CVE-2026-88816","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0486","OPENSUSE-SU-2026:11966-1","SUSE-SU-2026:4442-1","SUSE-SU-2026:4612-1","SUSE-SU-2026:4805-1","USN-8912-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:11966-1","SUSE-SU-2026:4442-1","SUSE-SU-2026:4612-1","SUSE-SU-2026:4805-1","USN-8912-1"]},"timeline":[{"kind":"published","date":"2026-09-28T16:04:40.458Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-30T19:51:20.177Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T19:46:07.847Z","stale":false,"partial":false}}