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CVE-2026-12844

List::SomeUtils::XS versions before 0.59 for Perl have a heap buffer overflow in the pairwise function. pairwise() collects the values returned by the block into a heap buffer sized to the longer input array, then grows the buffer before each copy with a single quadrupling (alloc <<= 2) instead of a loop. A block call that returns more than four times the current allocation in one invocation outgrows that one quadrupling, and the copy writes past the end of the buffer. Any caller of pairwise()
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e38665eb5d7b335141695fd72d47eafb36e8da76bd4590f62037daf66dacffa9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"List-SomeUtils-XS","product":"List::SomeUtils::XS","programFiles":["XS.xs"],"programRoutines":[{"name":"List::SomeUtils::XS::pairwise"}],"repo":"https://github.com/houseabsolute/List-SomeUtils-XS","vendor":"DROLSKY","versions":[{"lessThan":"0.59","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/06/25/11"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/adp/1/references/0
{"tags":["patch"],"url":"https://github.com/houseabsolute/List-SomeUtils-XS/commit/22549f78669b780d6aa338a2d2e49a3dedfffaa6.patch"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/cna/references/0
{"tags":["release-notes"],"url":"https://metacpan.org/release/DROLSKY/List-SomeUtils-XS-0.59/changes"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aaeafa1dbf536150cf078ccb5373577e044aae91902583ae8f042a2ae71fc94f · sha256:2bbfbd969d15561a… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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