CVE-2026-73193 (GCVE-0-2026-73193)
Vulnerability from cvelistv5 – Published: 2026-08-15 12:09 – Updated: 2026-08-15 12:09
VLAI
EPSS
VEX
Title
DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse
Summary
DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse.
preparse reserves its output buffer with `newSV(strlen(statement) * 7 + 16)`, budgeting seven output bytes per input byte for the longest ':p99999' expansion. The product is computed in STRLEN, which is 32 bits wide on a 32-bit perl build, so a statement of 613,566,757 bytes multiplies to 4,294,967,299, wraps modulo 2^32 to 3, and reserves 19 bytes. The parser then copies the statement out through a raw pointer with no capacity check, writing the whole 585 MB input past the end of the allocation. The 99,999 placeholder limit does not bound this path, which is reached by ordinary non-placeholder content.
Any caller that passes an untrusted statement of that length to preparse on a 32-bit perl gets a heap out-of-bounds write of attacker controlled bytes. Builds with a 64-bit STRLEN are not affected, since the wrap there needs a statement of about 2.3 exabytes.
Severity
No CVSS data available.
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.cve.org/CVERecord?id=CVE-2026-14739 | related |
| https://github.com/perl5-dbi/dbi/security/advisor… | vendor-advisory |
| https://github.com/perl5-dbi/dbi/commit/c751ae5a5… | patch |
{
"containers": {
"cna": {
"affected": [
{
"collectionURL": "https://cpan.org/modules",
"defaultStatus": "unaffected",
"modules": [
"DBI"
],
"packageName": "DBI",
"packageURL": "pkg:cpan/DBI",
"programFiles": [
"DBI.xs"
],
"programRoutines": [
{
"name": "preparse"
}
],
"repo": "https://github.com/perl5-dbi/dbi",
"versions": [
{
"lessThan": "1.652",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Chrysostomos Manousis"
}
],
"descriptions": [
{
"lang": "en",
"value": "DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse.\n\npreparse reserves its output buffer with `newSV(strlen(statement) * 7 + 16)`, budgeting seven output bytes per input byte for the longest \u0027:p99999\u0027 expansion. The product is computed in STRLEN, which is 32 bits wide on a 32-bit perl build, so a statement of 613,566,757 bytes multiplies to 4,294,967,299, wraps modulo 2^32 to 3, and reserves 19 bytes. The parser then copies the statement out through a raw pointer with no capacity check, writing the whole 585 MB input past the end of the allocation. The 99,999 placeholder limit does not bound this path, which is reached by ordinary non-placeholder content.\n\nAny caller that passes an untrusted statement of that length to preparse on a 32-bit perl gets a heap out-of-bounds write of attacker controlled bytes. Builds with a 64-bit STRLEN are not affected, since the wrap there needs a statement of about 2.3 exabytes."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-190",
"description": "CWE-190 Integer Overflow or Wraparound",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-787",
"description": "CWE-787 Out-of-bounds Write",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-15T12:09:03.948Z",
"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"shortName": "CPANSec"
},
"references": [
{
"tags": [
"related"
],
"url": "https://www.cve.org/CVERecord?id=CVE-2026-14739"
},
{
"tags": [
"vendor-advisory"
],
"url": "https://github.com/perl5-dbi/dbi/security/advisories/GHSA-wj3v-c3hh-mhqr"
},
{
"tags": [
"patch"
],
"url": "https://github.com/perl5-dbi/dbi/commit/c751ae5a5a6f56c2f8284f37c1f4d43500352ef1.patch"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to DBI 1.652 or later."
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse",
"workarounds": [
{
"lang": "en",
"value": "On 32-bit depoyments that cannot be upgraded, limit the size of SQL statements under 292 megabytes."
}
],
"x_generator": {
"engine": "cpansec-cna-tool 0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"assignerShortName": "CPANSec",
"cveId": "CVE-2026-73193",
"datePublished": "2026-08-15T12:09:03.948Z",
"dateReserved": "2026-08-11T11:58:19.137Z",
"dateUpdated": "2026-08-15T12:09:03.948Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-73193\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-08-15T13:17:48.327\",\"lastModified\":\"2026-08-15T13:17:48.327\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"DBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparse.\\n\\npreparse reserves its output buffer with `newSV(strlen(statement) * 7 + 16)`, budgeting seven output bytes per input byte for the longest \u0027:p99999\u0027 expansion. The product is computed in STRLEN, which is 32 bits wide on a 32-bit perl build, so a statement of 613,566,757 bytes multiplies to 4,294,967,299, wraps modulo 2^32 to 3, and reserves 19 bytes. The parser then copies the statement out through a raw pointer with no capacity check, writing the whole 585 MB input past the end of the allocation. The 99,999 placeholder limit does not bound this path, which is reached by ordinary non-placeholder content.\\n\\nAny caller that passes an untrusted statement of that length to preparse on a 32-bit perl gets a heap out-of-bounds write of attacker controlled bytes. Builds with a 64-bit STRLEN are not affected, since the wrap there needs a statement of about 2.3 exabytes.\"}],\"affected\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"affectedData\":[{\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://cpan.org/modules\",\"packageName\":\"DBI\",\"modules\":[\"DBI\"],\"programFiles\":[\"DBI.xs\"],\"programRoutines\":[{\"name\":\"preparse\"}],\"repo\":\"https://github.com/perl5-dbi/dbi\",\"packageURL\":\"pkg:cpan/DBI\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"1.652\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-190\"},{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"references\":[{\"url\":\"https://github.com/perl5-dbi/dbi/commit/c751ae5a5a6f56c2f8284f37c1f4d43500352ef1.patch\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://github.com/perl5-dbi/dbi/security/advisories/GHSA-wj3v-c3hh-mhqr\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://www.cve.org/CVERecord?id=CVE-2026-14739\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"}]}}",
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-15T23:53:09Z",
"cve": "CVE-2026-73193",
"id": "CVE-2026-73193",
"initial_release_date": "2026-08-15T23:53:09Z",
"product_status:known_affected": "4",
"product_status:known_not_affected": "22",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-73193",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-73193.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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