UBUNTU-CVE-2026-71380 (CVE-2026-71380)
Vulnerability from osv_ubuntu – Published: 2026-09-01 15:17 – Updated: 2026-09-28 20:33 – Source website
VLAI
Details
Missing Release of Resource after Effective Lifetime vulnerability in Erlang/OTP inets httpd allows an unauthenticated remote attacker to cause denial of service by sending valid request headers with a large Content-Length and then stalling before the body is complete. httpd_request_handler:handle_info/2 cancels the request timeout as soon as a parse step succeeds, which includes the headers, and the clause that handles a decoder asking for more data re-arms the socket with {active, once} without setting any further timer. httpd_request:whole_body/2 returns such a continuation whenever the bytes received are fewer than the announced Content-Length, so a well-formed request that stops mid-body leaves the worker waiting indefinitely. The periodic byte-rate check that would reclaim it is armed only when minimum_bytes_per_second is configured, which it is not by default. Repeating this across connections occupies every worker permitted by max_clients and denies service to legitimate clients at negligible bandwidth cost. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
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{
"binary_name": "erlang-nox",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-observer",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-odbc",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-os-mon",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-parsetools",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-public-key",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-reltool",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-runtime-tools",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-snmp",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-src",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-ssh",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-ssl",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-syntax-tools",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-tftp",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-tools",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-wx",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-x11",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
},
{
"binary_name": "erlang-xmerl",
"binary_version": "1:27.3.4.6+dfsg-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "erlang",
"purl": "pkg:deb/ubuntu/erlang@1:27.3.4.6+dfsg-1ubuntu0.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:27.3.4.6+dfsg-1ubuntu0.1"
}
],
"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": "Missing Release of Resource after Effective Lifetime vulnerability in Erlang/OTP inets httpd allows an unauthenticated remote attacker to cause denial of service by sending valid request headers with a large Content-Length and then stalling before the body is complete. httpd_request_handler:handle_info/2 cancels the request timeout as soon as a parse step succeeds, which includes the headers, and the clause that handles a decoder asking for more data re-arms the socket with {active, once} without setting any further timer. httpd_request:whole_body/2 returns such a continuation whenever the bytes received are fewer than the announced Content-Length, so a well-formed request that stops mid-body leaves the worker waiting indefinitely. The periodic byte-rate check that would reclaim it is armed only when minimum_bytes_per_second is configured, which it is not by default. Repeating this across connections occupies every worker permitted by max_clients and denies service to legitimate clients at negligible bandwidth cost. This issue affects OTP from OTP\u00a017.0 before OTP\u00a027.3.4.17, from OTP\u00a028.0 before OTP\u00a028.5.0.6, and from OTP\u00a029.0 before OTP\u00a029.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP\u00a017.0, corresponding to inets before 5.10, is affected is unknown.",
"id": "UBUNTU-CVE-2026-71380",
"modified": "2026-09-28T20:33:36Z",
"published": "2026-09-01T15:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-71380"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-71380"
},
{
"type": "REPORT",
"url": "https://github.com/erlang/otp/security/advisories/GHSA-5vp4-58hc-h8cc"
},
{
"type": "REPORT",
"url": "https://cna.erlef.org/cves/CVE-2026-71380.html"
},
{
"type": "REPORT",
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-71380"
},
{
"type": "REPORT",
"url": "https://github.com/erlang/otp/commit/81b453aac5a006bb8d26405f2bc3cf24e9d7733c"
},
{
"type": "REPORT",
"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8827-1"
}
],
"related": [
"USN-8827-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/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-2026-71380"
]
}
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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