CVE-2026-111879
DBI versions before 1.656 for Perl hang on a later open of a DBD::DBM table because a failed open_data does not release the table's lock.
open_data creates the table's lock file and takes an exclusive flock on it for a CREATE, before the checks that can croak: a dbm_mldbm value that is not a module name, a failing tie, or a missing data file. The croak unwinds before the table object is blessed, so nothing releases the lock, and the meta data holding the open descriptor stays cached on the database handle.
The dbm_mldbm and dbm_type values come from the DSN or the connect attributes, so a caller that chooses the serializer or the storage backend can trigger the failure.
Read full descriptionShow less
The flock has no timeout, so a later open of that table (even through a separate database handle) blocks for as long as the handle holding the stale lock lives, in the same process or any other.
CVSS
NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.18 %
- Percentile among all scored CVEs
- 7
- Score date
- 10/24/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-667
References
Raw JSON (NVD)
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{
"id": "CVE-2026-111879",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"affectedData": [
{
"repo": "https://github.com/perl5-dbi/dbi",
"modules": [
"DBI"
],
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.656",
"versionType": "custom"
}
],
"packageURL": "pkg:cpan/DBI",
"packageName": "DBI",
"programFiles": [
"lib/DBD/DBM.pm",
"lib/DBD/File.pm"
],
"collectionURL": "https://cpan.org/modules",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "DBD::DBM::Table::open_data"
},
{
"name": "DBD::File::DataSource::File::open_data"
}
]
}
]
}
],
"published": "2026-10-20T22:18:48.627",
"references": [
{
"url": "https://github.com/perl5-dbi/dbi/commit/99bbf2ab9d137e6f042a770bd3bbba3bc0b3a901.patch",
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
},
{
"url": "https://github.com/perl5-dbi/dbi/security/advisories/GHSA-8cx8-9vj9-9x7j",
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
},
{
"url": "https://metacpan.org/release/HMBRAND/DBI-1.656/changes",
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/10/20/38",
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"description": [
{
"lang": "en",
"value": "CWE-667"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "DBI versions before 1.656 for Perl hang on a later open of a DBD::DBM table because a failed open_data does not release the table's lock.\n\nopen_data creates the table's lock file and takes an exclusive flock on it for a CREATE, before the checks that can croak: a dbm_mldbm value that is not a module name, a failing tie, or a missing data file. The croak unwinds before the table object is blessed, so nothing releases the lock, and the meta data holding the open descriptor stays cached on the database handle.\n\nThe dbm_mldbm and dbm_type values come from the DSN or the connect attributes, so a caller that chooses the serializer or the storage backend can trigger the failure.\n\nThe flock has no timeout, so a later open of that table (even through a separate database handle) blocks for as long as the handle holding the stale lock lives, in the same process or any other."
}
],
"lastModified": "2026-10-22T17:21:57.293",
"sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
}