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CVE-2026-57432

Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack. S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of boun
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cfd56a6438a15f96e59d57b92666c68bb0ccef981c681e99a9b98d7b40d8c89b
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-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"perl","product":"perl","programFiles":["pp_pack.c"],"programRoutines":[{"name":"S_measure_struct"}],"repo":"https://github.com/Perl/perl5","vendor":"SHAY","versions":[{"lessThanOrEqual":"5.43.10","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/07/13/6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/adp/0/references/0
{"tags":["patch"],"url":"https://github.com/Perl/perl5/commit/40754edc72dd3e513d758153c0e2f0215897740e.patch"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/Perl/perl5/commit/5f7eb6bbbe0510964e3fb1d6bb691e5445913e55.patch"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2f863e2ee73b1bdbbffd230707f5530bb6469a19976b2680991dabeeb90ce677 · sha256:57f14c67a9096775… · /containers/cna/references/0

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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