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CVE-2026-43964

Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d1bf95f17a6b003673d9baf0be3a3ef3578ebc712aa9faca0aecc62741e6c4af
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 6 assertions

{"defaultStatus":"unaffected","product":"Postfix","vendor":"Postfix","versions":[{"lessThan":"3.8.16","status":"affected","version":"2.3","versionType":"custom"},{"lessThan":"3.9.10","status":"affected","version":"3.9","versionType":"custom"},{"lessThan":"3.10.9","status":"affected","version":"3.10","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.5.25-3.el9_8","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"postfix","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.8.5-10.el10_2","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8","cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.5.8-8.el8_10","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/1
cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/cna/metrics/0/cvssV3_1

{"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:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/metrics/1/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-193","description":"Off-by-one Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/problemTypes/0/descriptions/0

{"cweId":"CWE-193","description":"CWE-193 Off-by-one Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

6 source assertions
{"defaultStatus":"unaffected","product":"Postfix","vendor":"Postfix","versions":[{"lessThan":"3.8.16","status":"affected","version":"2.3","versionType":"custom"},{"lessThan":"3.9.10","status":"affected","version":"3.9","versionType":"custom"},{"lessThan":"3.10.9","status":"affected","version":"3.10","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.5.25-3.el9_8","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"postfix","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.8.5-10.el10_2","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8","cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"postfix","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2:3.5.8-8.el8_10","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/cna/metrics/0/cvssV3_1
{"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:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/metrics/1/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-193","description":"Off-by-one Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/problemTypes/0/descriptions/0
{"cweId":"CWE-193","description":"CWE-193 Off-by-one Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/05/04/30"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/1/references/0
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:25930"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/references/3
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:25932"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/references/4
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:26205"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/references/5
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-43964"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/references/0
{"name":"RHBZ#2466488","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466488"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/references/1
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43964.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /containers/adp/2/references/2
{"url":"https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbc0e199e28cfc0abc6578ddc13cd078a28fd1c44813fc9eb9ab85f73ade43e6 · sha256:a0c9d65c6f3667d8… · /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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