{"cve":{"cve_id":"CVE-2026-54890","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.0042,"epss_percentile":0.34809,"epss_as_of":"2026-10-15","description":"Integer Underflow (Wrap or Wraparound) vulnerability in erlang otp erlang/otp (erts modules), erlang otp erts (erts modules) allows Forced Integer Overflow, Excessive Allocation. This vulnerability is associated with program files erts/emulator/beam/external.c, emulator/beam/external.c.\n\nThe BIT_BINARY_EXT tag (77) handler in the External Term Format (ETF) decoder accepts an encoding with both length and trailing-bits fields set to zero. The subsequent computation of the bitstring size underflows an unsigned integer, producing a value of roughly 2^64 that is then passed as a memory allocation size. The allocator aborts the entire node with a message such as \"Cannot allocate 2305843009213693951 bytes of memory (of type binary)\".\n\nThe crash is a VM-level abort, not an Erlang-level exception. It cannot be intercepted by supervision trees, by try/catch, or by passing the [safe] option to binary_to_term/2 (which only restricts atom creation and does not perform structural validation of binary encodings).\n\nAny application that decodes ETF from untrusted sources via binary_to_term/1,2 or enif_binary_to_term() is exposed. The Erlang distribution protocol also decodes incoming terms through the same code path, but distribution is expected to run on trusted networks per the OTP Secure Coding Guidelines (DSG-011).\n\nThis issue affects OTP from OTP 27.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to erts from 15.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.","published_at":"2026-07-27T15:39:03.475000Z","last_modified_at":"2026-10-24T13:10:00.147000Z","cvss_v3_score":7.5,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":8.2,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","cvss_v4_severity":"HIGH","ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-191","CWE-789","CWE-1284"],"nvd_references":["https://github.com/erlang/otp/security/advisories/GHSA-54pw-5645-jh86","https://cna.erlef.org/cves/CVE-2026-54890.html","https://osv.dev/vulnerability/EEF-CVE-2026-54890","https://www.erlang.org/doc/system/versions.html#order-of-versions","https://github.com/erlang/otp/commit/dc1bf9344c0ce62717cf60866590cea0242780fd"],"vuln_status":"Analyzed","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-07-27T20:04:23.264708Z","updated_at":"2026-10-25T04:44:41.758691Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"P","value_label":"Present"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"H","value_label":"High"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"erlang","vendor_name":"erlang","product_slug":"erlang-otp","product_name":"erlang/otp","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"},{"vendor_slug":"erlang","vendor_name":"erlang","product_slug":"erts","product_name":"erts","version_start":"15.0","version_start_inclusive":true,"version_end":"15.2.7.11","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:erlang:erts:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/erlang/otp/security/advisories/GHSA-54pw-5645-jh86","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://cna.erlef.org/cves/CVE-2026-54890.html","source_type":"MISC","tags":[]},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-54890","source_type":"MISC","tags":[]},{"url":"https://www.erlang.org/doc/system/versions.html#order-of-versions","source_type":"MISC","tags":[]},{"url":"https://github.com/erlang/otp/commit/dc1bf9344c0ce62717cf60866590cea0242780fd","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-07-27T15:39:03.475000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-08-13T20:36:50.623501Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-08-13T20:36:50.623501Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-08-13T20:36:50.623501Z","label":"CVSS score revised","source":"nvd"}]}