{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-85644", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-09-04T12:35:22.410Z", "datePublished": "2026-09-28T16:09:02.613Z", "dateUpdated": "2026-09-28T18:10:33.637Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "modules": ["XS::Parse::Infix"], "packageName": "XS-Parse-Keyword", "packageURL": "pkg:cpan/XS-Parse-Keyword", "programFiles": ["src/infix.c"], "programRoutines": [{"name": "pp_push_defav_with_count"}], "versions": [{"lessThanOrEqual": "0.49", "status": "affected", "version": "0.40", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference.\n\nThe wrapper function XS::Parse::Infix generates for a list-associative infix operator checks whether arguments are array references, but it tests using SvRV() rather than SvROK(). SvRV() reads a union slot that only holds a referent once SvROK(sv) is true, so the guard never validates that it is a reference. For an IV or NV that slot holds the number itself, SvRV() returns the caller's value and SvTYPE() dereferences it at offset 12. This will generally result in a segmentation fault.\n\nAn application that hands the wrapper a list built from decoded input (for example, from JSON) lets whoever supplies a number in that list choose the address that the interpreter dereferences.\n\nAn ordinary string's byte 12 is rarely SVt_PVAV so the guard croaks by luck, but an attacker-crafted string carrying 0x0b there passes, and the buffer is then used as an AV head, with AvARRAY taken from bytes 16-23 and its entries pushed onto the Perl stack as live SVs.\n\nA simple proof-of-concept uses the zip operator:\n\n use Syntax::Operator::Zip 'zip';\n\n my @args = ([1], 2);\n zip(@args);"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-843", "description": "CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-09-28T16:09:02.613Z"}, "references": [{"tags": ["release-notes"], "url": "https://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/changes"}, {"url": "https://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/diff/PEVANS/XS-Parse-Keyword-0.49#src/infix.c"}], "solutions": [{"lang": "en", "value": "Upgrade to XS-Parse-Keyword 0.50 or later."}], "source": {"discovery": "UNKNOWN"}, "title": "XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference", "workarounds": [{"lang": "en", "value": "For deployments that cannot upgrade, ensure that correct arguments (only array references where they are expected) are passed to list-associative operators that are defined with XS::Parse::Infix, such as those in Syntax::Operator::Zip."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/28/14"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-28T18:10:33.637Z"}}]}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "modules": ["XS::Parse::Infix"], "packageName": "XS-Parse-Keyword", "packageURL": "pkg:cpan/XS-Parse-Keyword", "programFiles": ["src/infix.c"], "programRoutines": [{"name": "pp_push_defav_with_count"}], "versions": [{"lessThanOrEqual": "0.49", "status": "affected", "version": "0.40", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference.\n\nThe wrapper function XS::Parse::Infix generates for a list-associative infix operator checks whether arguments are array references, but it tests using SvRV() rather than SvROK(). SvRV() reads a union slot that only holds a referent once SvROK(sv) is true, so the guard never validates that it is a reference. For an IV or NV that slot holds the number itself, SvRV() returns the caller's value and SvTYPE() dereferences it at offset 12. This will generally result in a segmentation fault.\n\nAn application that hands the wrapper a list built from decoded input (for example, from JSON) lets whoever supplies a number in that list choose the address that the interpreter dereferences.\n\nAn ordinary string's byte 12 is rarely SVt_PVAV so the guard croaks by luck, but an attacker-crafted string carrying 0x0b there passes, and the buffer is then used as an AV head, with AvARRAY taken from bytes 16-23 and its entries pushed onto the Perl stack as live SVs.\n\nA simple proof-of-concept uses the zip operator:\n\n use Syntax::Operator::Zip 'zip';\n\n my @args = ([1], 2);\n zip(@args);"}], "id": "CVE-2026-85644", "lastModified": "2026-09-28T19:16:50.367", "metrics": {}, "published": "2026-09-28T17:17:51.127", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/changes"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/diff/PEVANS/XS-Parse-Keyword-0.49#src/infix.c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/09/28/14"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-843"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{"bugzilla": {"description": "perl-XS-Parse-Keyword: perl-XS-Parse-Keyword: Denial of Service via improper array reference validation", "id": "2542563", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542563"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-843", "details": ["A flaw was found in perl-XS-Parse-Keyword. This vulnerability allows an attacker to cause a Denial of Service (DoS) or potentially execute arbitrary code by supplying crafted input to an affected application. The issue occurs because the module improperly validates arguments for list-associative operators, treating numbers or formatted strings as array references and causing the interpreter to dereference arbitrary memory addresses."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-85644", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "perl-XS-Parse-Keyword", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2026-09-28T16:09:02Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-85644\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-85644\nhttps://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/changes\nhttps://metacpan.org/release/PEVANS/XS-Parse-Keyword-0.50/diff/PEVANS/XS-Parse-Keyword-0.49#src/infix.c"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0.40,0.49]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "product": "xs::parse::infix", "vendor": "perl"}], "created": "2026-09-29T13:20:52.490134+00:00", "updated": "2026-09-29T13:20:52.490188+00:00", "vendors": ["perl", "perl$PRODUCT$xs::parse::infix"]}