CVE-2026-49759 (GCVE-0-2026-49759)
Vulnerability from cvelistv5 – Published: 2026-06-10 14:35 – Updated: 2026-07-01 04:45
VLAI?
Title
Stack buffer overflow in SCTP error cause parsing in inet_drv allows remote VM crash
Summary
Stack-based Buffer Overflow vulnerability in Erlang OTP erts (inet_drv) allows an unauthenticated remote attacker to crash the BEAM VM by sending a crafted SCTP ERROR chunk.
The sctp_parse_error_chunk function in erts/emulator/drivers/common/inet_drv.c parses SCTP ERROR chunks and writes cause codes into a fixed-size stack-allocated ErlDrvTermData spec[] array without checking bounds. A remote attacker who has established an SCTP association to a listening port can send a single crafted SCTP ERROR chunk containing enough cause codes to overflow the stack buffer, crashing the VM. The attacker can only write 16-bit values interleaved with a fixed tag, so the overflow does not provide a controlled return address, limiting exploitation to Denial of Service.
A crafted SCTP ERROR chunk may also leak bits and pieces of Erlang VM memory into the received error packet observed by the Erlang process. Such data is already readable by the user running the Erlang VM, so the disclosure scope is limited.
This issue affects OTP from OTP 17.0 before 27.3.4.13, 28.5.0.2 and 29.0.2, corresponding to erts from 6.0 before 15.2.7.9, 16.4.0.2 and 17.0.2.
Severity ?
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
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Impacted products
Credits
Zhang Delong
Raimo Niskanen
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Such data is already readable by the user running the Erlang VM, so the disclosure scope is limited.\\n\\nThis issue affects OTP from OTP 17.0 before 27.3.4.13, 28.5.0.2 and 29.0.2, corresponding to erts from 6.0 before 15.2.7.9, 16.4.0.2 and 17.0.2.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Stack-based Buffer Overflow vulnerability in Erlang OTP \u003ctt\u003eerts\u003c/tt\u003e (\u003ctt\u003einet_drv\u003c/tt\u003e) allows an unauthenticated remote attacker to crash the BEAM VM by sending a crafted SCTP ERROR chunk.\u003cp\u003eThe \u003ctt\u003esctp_parse_error_chunk\u003c/tt\u003e function in \u003ctt\u003eerts/emulator/drivers/common/inet_drv.c\u003c/tt\u003e parses SCTP ERROR chunks and writes cause codes into a fixed-size stack-allocated \u003ctt\u003eErlDrvTermData spec[]\u003c/tt\u003e array without checking bounds. A remote attacker who has established an SCTP association to a listening port can send a single crafted SCTP ERROR chunk containing enough cause codes to overflow the stack buffer, crashing the VM. The attacker can only write 16-bit values interleaved with a fixed tag, so the overflow does not provide a controlled return address, limiting exploitation to Denial of Service.\u003c/p\u003e\u003cp\u003eA crafted SCTP ERROR chunk may also leak bits and pieces of Erlang VM memory into the received error packet observed by the Erlang process. Such data is already readable by the user running the Erlang VM, so the disclosure scope is limited.\u003c/p\u003e\u003cp\u003eThis issue affects OTP from OTP 17.0 before 27.3.4.13, 28.5.0.2 and 29.0.2, corresponding to erts from 6.0 before 15.2.7.9, 16.4.0.2 and 17.0.2.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-121\", \"description\": \"CWE-121 Stack-based Buffer Overflow\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"SCTP support must be compiled into OTP. A listening SCTP socket must be opened via gen_sctp with the default inet backend and must be reachable from the attacker\u0027s network. Windows builds are unaffected as SCTP is not supported on Windows.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"SCTP support must be compiled into OTP. 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Windows builds are unaffected as SCTP is not supported on Windows.\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"27.3.4.13\", \"versionStartIncluding\": \"17.0\"}, {\"criteria\": \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"28.5.0.2\", \"versionStartIncluding\": \"28.0\"}, {\"criteria\": \"cpe:2.3:a:erlang:erlang\\\\/otp:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"29.0.2\", \"versionStartIncluding\": \"29.0\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-07-01T04:45:31.080Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-49759\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-01T04:45:31.080Z\", \"dateReserved\": \"2026-06-01T13:45:22.449Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-06-10T14:35:38.838Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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