{"id":"CVE-2026-59139","state":"PUBLISHED","title":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked","description":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap'd segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot's offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process.","publishedAt":"2026-07-21T19:02:43.033Z","updatedAt":"2026-07-22T19:16:27.039Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"CISA-ADP"},"assigner":"CPANSec","products":["EGOR Data::ReqRep::Shared"],"affected":[{"vendor":"EGOR","product":"Data::ReqRep::Shared","packageName":"Data-ReqRep-Shared","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.05","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["reqrep.h"],"programRoutines":[{"name":"reqrep_recv_locked"}],"repo":"https://github.com/vividsnow/perl5-data-reqrep-shared"}],"references":["https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h","https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59139.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59139","state":"PUBLISHED","datePublished":"2026-07-21T19:02:43.033Z","dateUpdated":"2026-07-22T19:16:27.039Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2026-07-02T16:24:17.912Z"},"containers":{"cna":{"title":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked","descriptions":[{"lang":"en","value":"Data::ReqRep::Shared versions before 0.05 for Perl allow an out-of-bounds read via an unvalidated arena offset and length in reqrep_recv_locked.\n\nThe attach-time validator reqrep_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. reqrep_recv_locked does memcpy(copy_buf, req_arena + arena_off, len) with arena_off and len read raw from the mmap'd segment and never bounded against the arena capacity (req_arena_cap).\n\nA local peer that can write the backing file can leave the header valid while poisoning a request slot's offset and length, so receiving the request copies a file-controlled offset and length out of the arena, reading adjacent memory or crashing the process."}],"affected":[{"vendor":"EGOR","product":"Data::ReqRep::Shared","packageName":"Data-ReqRep-Shared","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.05","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["reqrep.h"],"programRoutines":[{"name":"reqrep_recv_locked"}],"repo":"https://github.com/vividsnow/perl5-data-reqrep-shared"}],"references":[{"url":"https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/diff/EGOR/Data-ReqRep-Shared-0.04#reqrep.h"},{"url":"https://metacpan.org/release/EGOR/Data-ReqRep-Shared-0.05/changes","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2026-07-21T19:02:43.033Z"},"solutions":[{"lang":"en","value":"Upgrade to Data::ReqRep::Shared 0.05 or later, which bounds the arena offset and length against the arena capacity before the copy."}],"source":{"discovery":"UNKNOWN"},"workarounds":[{"lang":"en","value":"For deployments that cannot upgrade to 0.05, place the backing file in a directory writable only by the owning user, so a local peer cannot tamper with the segment contents the read path trusts."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.1,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-07-22T19:16:20.997158Z","id":"CVE-2026-59139","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-22T19:16:27.039Z"}}]}}}