CVE-2026-49759 (GCVE-0-2026-49759)
Vulnerability from cvelistv5
Published
2026-06-10 14:35
Modified
2026-06-10 16:18
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-121 - Stack-based Buffer Overflow
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.
References
| URL | Tags | |
|---|---|---|
|
|
||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-49759",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-10T16:18:27.945916Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-10T16:18:43.800Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"modules": [
"inet_drv"
],
"packageName": "erts",
"packageURL": "pkg:otp/erts?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp\u0026vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
"product": "OTP",
"programFiles": [
"emulator/drivers/common/inet_drv.c"
],
"programRoutines": [
{
"name": "sctp_parse_error_chunk"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "15.2.7.9",
"status": "unaffected"
},
{
"at": "16.4.0.2",
"status": "unaffected"
},
{
"at": "17.0.2",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "6.0",
"versionType": "otp"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unknown",
"modules": [
"inet_drv"
],
"packageName": "erlang/otp",
"packageURL": "pkg:github/erlang/otp",
"product": "OTP",
"programFiles": [
"erts/emulator/drivers/common/inet_drv.c"
],
"programRoutines": [
{
"name": "sctp_parse_error_chunk"
}
],
"repo": "https://github.com/erlang/otp",
"vendor": "Erlang",
"versions": [
{
"changes": [
{
"at": "27.3.4.13",
"status": "unaffected"
},
{
"at": "28.5.0.2",
"status": "unaffected"
},
{
"at": "29.0.2",
"status": "unaffected"
}
],
"lessThan": "*",
"status": "affected",
"version": "17.0",
"versionType": "otp"
},
{
"lessThan": "3983d495284331c121f600a80bac9fcf4e16381e",
"status": "affected",
"version": "84adefa331c4159d432d22840663c38f155cd4c1",
"versionType": "git"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "SCTP support must be compiled into OTP. A listening SCTP socket must be opened via \u003ctt\u003egen_sctp\u003c/tt\u003e with the default \u003ctt\u003einet\u003c/tt\u003e backend and must be reachable from the attacker\u0027s network. Windows builds are unaffected as SCTP is not supported on Windows."
}
],
"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."
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "27.3.4.13",
"versionStartIncluding": "17.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "28.5.0.2",
"versionStartIncluding": "28.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*",
"versionEndExcluding": "29.0.2",
"versionStartIncluding": "29.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Zhang Delong"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Raimo Niskanen"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"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"
}
],
"value": "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.\n\nThe 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.\n\nA 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.\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."
}
],
"impacts": [
{
"capecId": "CAPEC-100",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-100 Overflow Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-121",
"description": "CWE-121 Stack-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-10T14:38:30.417Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/erlang/otp/security/advisories/GHSA-6f4f-chj5-5g97"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-49759.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-49759"
},
{
"tags": [
"x_version-scheme"
],
"url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
},
{
"tags": [
"patch"
],
"url": "https://github.com/erlang/otp/commit/3983d495284331c121f600a80bac9fcf4e16381e"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Stack buffer overflow in SCTP error cause parsing in inet_drv allows remote VM crash",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-49759",
"datePublished": "2026-06-10T14:35:38.838Z",
"dateReserved": "2026-06-01T13:45:22.449Z",
"dateUpdated": "2026-06-10T16:18:43.800Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…