ubuntu-cve-2026-54890
Vulnerability from osv_ubuntu
Published
2026-07-27 16:17
Modified
2026-07-29 07:59
Summary
Details
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. The 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)". The 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). Any 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). This 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.
Severity
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
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"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-snmp",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-src",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-ssh",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-ssl",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-syntax-tools",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-tftp",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-tools",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-wx",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-x11",
"binary_version": "1:27.3.4.6+dfsg-1"
},
{
"binary_name": "erlang-xmerl",
"binary_version": "1:27.3.4.6+dfsg-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "erlang",
"purl": "pkg:deb/ubuntu/erlang@1:27.3.4.6+dfsg-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:27.3.4.1+dfsg-1build1",
"1:27.3.4.3+dfsg-1",
"1:27.3.4.4+dfsg-1",
"1:27.3.4.6+dfsg-1"
]
}
],
"aliases": [],
"details": "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. The 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)\". The 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). Any 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). This issue affects OTP from OTP 27.0 before OTP\u00a029.0.4, OTP\u00a028.5.0.4 and OTP\u00a027.3.4.15, corresponding to erts from 15.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.",
"id": "UBUNTU-CVE-2026-54890",
"modified": "2026-07-29T07:59:15Z",
"published": "2026-07-27T16:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-54890"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-54890"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "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",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-54890"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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