CVE Explorer

CVE-2026-64613

Data::Buffer::Shared versions before 0.05 for Perl create a world-readable mmap backing file and open it without O_NOFOLLOW. The segment is created in buf_generic.h with open(path, O_RDWR|O_CREAT|O_EXCL, 0666). O_EXCL blocks a pre-seeded file on create, but the mode is 0666, so under the default umask 022 the file is created mode 0644 (world-readable), and O_NOFOLLOW is absent, so a symlink planted at the path is followed when the segment is attached. A "Shared" segment naturally lives in a sh

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0e3601c222a9b0b583e484bf74809b290fc71253cb28d640e123f13e9edfcb9f

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-59","description":"CWE-59 Improper Link Resolution Before File Access","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-732","description":"CWE-732 Incorrect Permission Assignment for Critical Resource","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"Data-Buffer-Shared","product":"Data::Buffer::Shared","programFiles":["buf_generic.h"],"repo":"https://github.com/vividsnow/perl5-data-buffer-shared","vendor":"EGOR","versions":[{"lessThan":"0.05","status":"affected","version":"0","versionType":"custom"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-59","description":"CWE-59 Improper Link Resolution Before File Access","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-732","description":"CWE-732 Incorrect Permission Assignment for Critical Resource","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"tags":["release-notes"],"url":"https://metacpan.org/release/EGOR/Data-Buffer-Shared-0.05/changes"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /containers/cna/references/1

{"url":"https://metacpan.org/release/EGOR/Data-Buffer-Shared-0.05/diff/EGOR/Data-Buffer-Shared-0.04#buf_generic.h"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:54139ec6210e829cc324ec1f00192ebf79ae5a15f33ba0927197ee1c379d0d79 · sha256:0f3b2be1b939545b… · /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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