CVE catalog

CVE-2026-85644

XS::Parse::Infix versions from 0.40 through 0.49 for…

XS::Parse::Infix versions from 0.40 through 0.49 for Perl treat a number as an array reference. The 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. An 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. An 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. A simple proof-of-concept uses the zip operator: use Syntax::Operator::Zip 'zip'; my @args = ([1], 2); zip(@args);

Severity: High · CVSS 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Sep 23, 2026, 12:00:00 AM UTC
Updated: Sep 28, 2026, 5:17:51 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.37% · Oct 27, 2026

Projects and upstream resources

[perl-xs-parse-keyword][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiansid	libxs-parse-keyword-perl	`0.51-1`	FixedDistribution-reported fixed boundary	[CVE-2026-85644]
Debianforky	libxs-parse-keyword-perl	`0.51-1`	FixedDistribution-reported fixed boundary	[CVE-2026-85644]

Showing 2 fix observations. All 16 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	libxs-parse-keyword-perl	Not reported	Not affectedDistribution reports not affected	[CVE-2026-85644]
Debianbookworm	libxs-parse-keyword-perl	`0.33-1`	Not affected	[CVE-2026-85644]
Debianforky	libxs-parse-keyword-perl	`0.51-1`	FixedDistribution-reported fixed boundary	[CVE-2026-85644]
Debiansid	libxs-parse-keyword-perl	`0.51-1`	FixedDistribution-reported fixed boundary	[CVE-2026-85644]
Debiantrixie	libxs-parse-keyword-perl	Not reported	AffectedDistribution reports no fix	[CVE-2026-85644]
Debiantrixie	libxs-parse-keyword-perl	`0.48-2`	Affected	[CVE-2026-85644]
Opensuseleap 16.0	perl-XS-Parse-Keyword	`0.480.0-160000.3.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2026:22101-1]Oct 19, 2026, 5:23:14 PM UTC
Opensusetumbleweed	perl-XS-Parse-Keyword	`0.500.0-1.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2026:11863-1]Sep 24, 2026, 6:23:16 PM UTC
Suselinux enterprise server 16.0	perl-XS-Parse-Keyword	`0.480.0-160000.3.1`	UnknownSource applicability is not established	[SUSE-SU-2026:24244-1]Oct 21, 2026, 5:23:12 PM UTC
Suselinux enterprise server for sap applications 16.0	perl-XS-Parse-Keyword	`0.480.0-160000.3.1`	UnknownSource applicability is not established	[SUSE-SU-2026:24244-1]Oct 21, 2026, 5:23:12 PM UTC
Ubuntu26.04	libxs-parse-keyword-perl	`0.48-2`	UnknownSource applicability is not established	[USN-8940-1]Oct 21, 2026, 4:41:56 AM UTC[UBUNTU-CVE-2026-85644]Oct 21, 2026, 4:30:02 AM UTC
Ubuntu26.04	libxs-parse-keyword-perl	`0.49-1`	UnknownSource applicability is not established	[USN-8940-1]Oct 21, 2026, 4:41:56 AM UTC[UBUNTU-CVE-2026-85644]Oct 21, 2026, 4:30:02 AM UTC
Ubuntu26.04	libxs-parse-keyword-perl	`0.49-1ubuntu0.1`	UnknownSource applicability is not established	[USN-8940-1]Oct 21, 2026, 4:41:56 AM UTC[UBUNTU-CVE-2026-85644]Oct 21, 2026, 4:30:02 AM UTC
Ubuntu26.10	libxs-parse-keyword-perl	`0.49-1`	UnknownSource applicability is not established	[USN-8940-1]Oct 21, 2026, 4:41:56 AM UTC[UBUNTU-CVE-2026-85644]Oct 21, 2026, 4:30:02 AM UTC
Ubuntu26.10	libxs-parse-keyword-perl	`0.49-1build1`	UnknownSource applicability is not established	[USN-8940-1]Oct 21, 2026, 4:41:56 AM UTC[UBUNTU-CVE-2026-85644]Oct 21, 2026, 4:30:02 AM UTC
Ubuntu26.10	libxs-parse-keyword-perl	`0.49-1ubuntu1`	UnknownSource applicability is not established	[USN-8940-1]Oct 21, 2026, 4:41:56 AM UTC[UBUNTU-CVE-2026-85644]Oct 21, 2026, 4:30:02 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "libxs-parse-keyword-perl",
      "status": "fixed",
      "release": "sid",
      "version": "0.51-1"
    },
    {
      "name": "libxs-parse-keyword-perl",
      "status": "fixed",
      "release": "forky",
      "version": "0.51-1"
    },
    {
      "name": "libxs-parse-keyword-perl",
      "status": "vulnerable",
      "release": "trixie",
      "version": "0.48-2"
    },
    {
      "name": "libxs-parse-keyword-perl",
      "status": "not affected",
      "release": "bookworm",
      "version": "0.33-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1149243,
      "name": "libxs-parse-keyword-perl",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "0.51-1"
    },
    {
      "bug": 1149243,
      "name": "libxs-parse-keyword-perl",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "0.51-1"
    },
    {
      "bug": 1149243,
      "name": "libxs-parse-keyword-perl",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1149243,
      "name": "libxs-parse-keyword-perl",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "perl-XS-Parse-Keyword",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.500.0-1.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2026:11863-1",
      "fixed_version": "0.500.0-1.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2026:11863-1",
      "provider_updated_at": "2026-09-24T18:23:16.166259268Z",
      "applicability_unknown": true
    },
    {
      "name": "perl-XS-Parse-Keyword",
      "distro": "suse",
      "ranges": [
        {
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          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.480.0-160000.3.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/SUSE-SU-2026:24244-1",
      "fixed_version": "0.480.0-160000.3.1",
      "provider_source": "pypi",
      "provider_record_id": "SUSE-SU-2026:24244-1",
      "provider_updated_at": "2026-10-21T17:23:12.050267279Z",
      "applicability_unknown": true
    },
    {
      "name": "perl-XS-Parse-Keyword",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.480.0-160000.3.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server for sap applications 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/SUSE-SU-2026:24244-1",
      "fixed_version": "0.480.0-160000.3.1",
      "provider_source": "pypi",
      "provider_record_id": "SUSE-SU-2026:24244-1",
      "provider_updated_at": "2026-10-21T17:23:12.050267279Z",
      "applicability_unknown": true
    },
    {
      "name": "libxs-parse-keyword-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.49-1ubuntu1"
            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "0.49-1",
        "0.49-1build1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-8940-1",
      "fixed_version": "0.49-1ubuntu1",
      "provider_source": "pypi",
      "provider_record_id": "USN-8940-1",
      "provider_updated_at": "2026-10-21T04:41:56.356651818Z",
      "applicability_unknown": true
    },
    {
      "name": "libxs-parse-keyword-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.49-1ubuntu0.1"
            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "0.48-2",
        "0.49-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-8940-1",
      "fixed_version": "0.49-1ubuntu0.1",
      "provider_source": "pypi",
      "provider_record_id": "USN-8940-1",
      "provider_updated_at": "2026-10-21T04:41:56.356651818Z",
      "applicability_unknown": true
    },
    {
      "name": "libxs-parse-keyword-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
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            },
            {
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            }
          ]
        }
      ],
      "release": "26.10",
      "versions": [
        "0.49-1",
        "0.49-1build1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-85644",
      "fixed_version": "0.49-1ubuntu1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-85644",
      "provider_updated_at": "2026-10-21T04:30:02.767002773Z",
      "applicability_unknown": true
    },
    {
      "name": "libxs-parse-keyword-perl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
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            },
            {
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            }
          ]
        }
      ],
      "release": "26.04",
      "versions": [
        "0.48-2",
        "0.49-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-85644",
      "fixed_version": "0.49-1ubuntu0.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2026-85644",
      "provider_updated_at": "2026-10-21T04:30:02.767002773Z",
      "applicability_unknown": true
    },
    {
      "name": "perl-XS-Parse-Keyword",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.480.0-160000.3.1"
            }
          ]
        }
      ],
      "release": "leap 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2026:22101-1",
      "fixed_version": "0.480.0-160000.3.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2026:22101-1",
      "provider_updated_at": "2026-10-19T17:23:14.478132524Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #1149243]

Publisher notes

[trixie] libxs-parse-keyword-perl: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libxs-parse-keyword-perl]Unknown
Details (2)
- 0.33-1 · amd64 · bookworm
  Not affected
  nvd · libxs-parse-keyword-perl · debian · bookworm
- 0.33-1 · arm64 · bookworm
  Not affected
  nvd · libxs-parse-keyword-perl · debian · bookworm

[Debian 13 (Trixie)]

[libxs-parse-keyword-perl]Unknown
Details (2)
- 0.48-2 · amd64 · trixie
  Affected
  nvd · libxs-parse-keyword-perl · debian · 13
- 0.48-2 · arm64 · trixie
  Affected
  nvd · libxs-parse-keyword-perl · debian · 13

[openSUSE Tumbleweed]

[perl-XS-Parse-Keyword]Unknown
Source package: [perl-XS-Parse-Keyword]
Details (1)
- 0.490.0-1.6 · x86_64 · tumbleweed
  Affected · Fixed: 0.500.0-1.1
  nvd · perl-XS-Parse-Keyword · opensuse · tumbleweed

Observed: Oct 23, 2026, 11:04:51 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]