{"id":"CVE-2026-42771","aliases":["BELL-CVE-2026-42771","EUVD-2026-35488","GHSA-6fmj-jmjq-qcmg","RHSA-2026:42825","RHSA-2026:55543","RHSA-2026:59635","RHSA-2026:59641","RHSA-2026:62562","RHSA-2026:62563","RHSA-2026:62790","RHSA-2026:67551","UBUNTU-CVE-2026-42771"],"status":"published","title":"Possible Out of Bounds Read in X509_VERIFY_PARAM_set1_email()","description":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an\napplication to validate a crafted e-mail address, such as during S/MIME\nmessage validation, an out of bounds read can happen.\n\nImpact summary: This out of bounds read will not directly exfiltrate\nthe data read to the attacker so the most likely result is a crash and\na Denial of Service.\n\nAn internal helper function called from X509_VERIFY_PARAM_[set|add]_email()\nused a wrong length when validating the local part of an email address.\nThis could cause the 64 octet limit on the local part of an email address\nto be not enforced, or cause an out of bound read and potentially a crash.\n\nThe bug is reachable via S-MIME validation with a crafted From: address\nsupplied in an email message that can potentially cause a crash.\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.","severity":{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00218,"percentile":0.12358,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-06-09T00:00:00Z","modified":"2026-10-28T11:13:31Z","affected":[{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"chunkah","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:0.6.0-3.hum1"}]}],"bundled":21},{"source":"osv","ecosystem":"Red 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Out of Bounds Read in X509_VERIFY_PARAM_set1_email()","description":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an\napplication to validate a crafted e-mail address, such as during S/MIME\nmessage validation, an out of bounds read can happen.\n\nImpact summary: This out of bounds read will not directly exfiltrate\nthe data read to the attacker so the most likely result is a crash and\na Denial of Service.\n\nAn internal helper function called from X509_VERIFY_PARAM_[set|add]_email()\nused a wrong length when validating the local part of an email address.\nThis could cause the 64 octet limit on the local part of an email address\nto be not enforced, or cause an out of bound read and potentially a crash.\n\nThe bug is reachable via S-MIME validation with a crafted From: address\nsupplied in an email message that can potentially cause a crash.\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.","status":"published","published":"2026-06-09T16:03:30.565Z","modified":"2026-06-10T07:48:09.673Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"adp"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T13:40:35.004553Z"}],"euvd":[{"id":"EUVD-2026-35488","description":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an\napplication to validate a crafted e-mail address, such as during S/MIME\nmessage validation, an out of bounds read can happen.\n\nImpact summary: This out of bounds read will not directly exfiltrate\nthe data read to the attacker so the most likely result is a crash and\na Denial of Service.\n\nAn internal helper function called from X509_VERIFY_PARAM_[set|add]_email()\nused a wrong length when validating the local part of an email address.\nThis could cause the 64 octet limit on the local part of an email address\nto be not enforced, or cause an out of bound read and potentially a crash.\n\nThe bug is reachable via S-MIME validation with a crafted From: address\nsupplied in an email message that can potentially cause a crash.\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.","status":"published","published":"2026-06-09T16:03:30Z","modified":"2026-06-10T07:48:09Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T18:20:45.803611Z"}],"ghsa":[{"id":"GHSA-6fmj-jmjq-qcmg","title":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an\napplication to validate a...","description":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an\napplication to validate a crafted e-mail address, such as during S/MIME\nmessage validation, an out of bounds read can happen.\n\nImpact summary: This out of bounds read will not directly exfiltrate\nthe data read to the attacker so the most likely result is a crash and\na Denial of Service.\n\nAn internal helper function called from X509_VERIFY_PARAM_[set|add]_email()\nused a wrong length when validating the local part of an email address.\nThis could cause the 64 octet limit on the local part of an email address\nto be not enforced, or cause an out of bound read and potentially a crash.\n\nThe bug is reachable via S-MIME validation with a crafted From: address\nsupplied in an email message that can potentially cause a crash.\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.","status":"published","published":"2026-06-09T18:30:43Z","modified":"2026-06-10T09:31:57Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:08:43.417477Z"}],"nvd":[{"id":"CVE-2026-42771","description":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an\napplication to validate a crafted e-mail address, such as during S/MIME\nmessage validation, an out of bounds read can happen.\n\nImpact summary: This out of bounds read will not directly exfiltrate\nthe data read to the attacker so the most likely result is a crash and\na Denial of Service.\n\nAn internal helper function called from X509_VERIFY_PARAM_[set|add]_email()\nused a wrong length when validating the local part of an email address.\nThis could cause the 64 octet limit on the local part of an email address\nto be not enforced, or cause an out of bound read and potentially a crash.\n\nThe bug is reachable via S-MIME validation with a crafted From: address\nsupplied in an email message that can potentially cause a crash.\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.","status":"published","published":"2026-06-09T17:17:08.663Z","modified":"2026-07-23T08:10:00.137Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:23.109705Z"}],"osv":[{"id":"BELL-CVE-2026-42771","title":"CVE-2026-42771 does not affect BellSoft software","status":"withdrawn","published":"2026-06-11T06:12:00.738799Z","modified":"2026-06-12T07:15:04.582555628Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:23.844435Z"},{"id":"CVE-2026-42771","title":"Possible Out of Bounds Read in X509_VERIFY_PARAM_set1_email()","description":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an\napplication to validate a crafted e-mail address, such as during S/MIME\nmessage validation, an out of bounds read can happen.\n\nImpact summary: This out of bounds read will not directly exfiltrate\nthe data read to the attacker so the most likely result is a crash and\na Denial of Service.\n\nAn internal helper function called from X509_VERIFY_PARAM_[set|add]_email()\nused a wrong length when validating the local part of an email address.\nThis could cause the 64 octet limit on the local part of an email address\nto be not enforced, or cause an out of bound read and potentially a crash.\n\nThe bug is reachable via S-MIME validation with a crafted From: address\nsupplied in an email message that can potentially cause a crash.\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.","status":"published","published":"2026-06-09T16:03:30.565Z","modified":"2026-10-28T11:13:31.425262335Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:45:04.117819Z"},{"id":"RHSA-2026:42825","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-29T10:05:47Z","modified":"2026-10-20T10:09:07Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:20.491441Z"},{"id":"RHSA-2026:55543","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-29T10:06:17Z","modified":"2026-10-20T10:11:20Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:59635","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-27T10:15:54Z","modified":"2026-10-20T10:12:09Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:59641","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-27T10:15:54Z","modified":"2026-10-20T10:12:09Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:62562","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-09-03T10:14:27Z","modified":"2026-10-20T10:12:39Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:62563","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-09-03T10:14:28Z","modified":"2026-10-20T10:12:39Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:62790","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-09-22T10:17:08Z","modified":"2026-10-20T10:12:46Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:67551","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-09-22T10:18:42Z","modified":"2026-10-20T10:13:58Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:22.406388Z"},{"id":"UBUNTU-CVE-2026-42771","description":"Issue summary: When the X509_VERIFY_PARAM_set1_email is called by an application to validate a crafted e-mail address, such as during S/MIME message validation, an out of bounds read can happen. Impact summary: This out of bounds read will not directly exfiltrate the data read to the attacker so the most likely result is a crash and a Denial of Service. An internal helper function called from X509_VERIFY_PARAM_[set|add]_email() used a wrong length when validating the local part of an email address. This could cause the 64 octet limit on the local part of an email address to be not enforced, or cause an out of bound read and potentially a crash. The bug is reachable via S-MIME validation with a crafted From: address supplied in an email message that can potentially cause a crash. No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary.","status":"published","published":"2026-06-09T00:00:00Z","modified":"2026-06-12T09:04:13.826122966Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:18.393417Z"}]}}