Remote VM crash via SCTP cause overflow
Published Jun 10, 2026 · Updated Jun 10, 2026
Stack-based buffer overflow in Erlang/OTP erts allows remote attackers to crash the BEAM VM with a crafted SCTP ERROR chunk. The sctp_parse_error_chunk function writes attacker-supplied cause codes into a fixed-size stack ErlDrvTermData array without checking remaining capacity. Exploitation requires compiled SCTP support, a reachable gen_sctp listener using the default inet backend, and an affected OTP or erts release line; constrained writes limit the practical impact to a VM crash and limited process-visible memory leakage.
Summary
What happened
Stack-based buffer overflow in Erlang/OTP erts allows remote attackers to crash the BEAM VM with a crafted SCTP ERROR chunk. The sctp_parse_error_chunk function writes attacker-supplied cause codes into a fixed-size stack ErlDrvTermData array without checking remaining capacity. Exploitation requires compiled SCTP support, a reachable gen_sctp listener using the default inet backend, and an affected OTP or erts release line; constrained writes limit the practical impact to a VM crash and limited process-visible memory leakage.
The record
- CVE
- CVE-2026-49759
- Published
- Jun 10, 2026
- Updated
- Jun 10, 2026
- Vendor
- Erlang
- Product
- Erlang/OTP
- Classifications
- CWE-121, CWE-120, CAPEC-100, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 10, 2026CVE publishedPublication date reported by the CVE source.
- Jun 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=17.0 <* changes=[{"at":"27.3.4.13","status":"unaffected"},{"at":"28.5.0.2","status":"unaffected"},{"at":"29.0.2","status":"unaffected"}]
- Affected versionversion=6.0 <* changes=[{"at":"15.2.7.9","status":"unaffected"},{"at":"16.4.0.2","status":"unaffected"},{"at":"17.0.2","status":"unaffected"}]
- Affected versionversion=84adefa331c4159d432d22840663c38f155cd4c1 <3983d495284331c121f600a80bac9fcf4e16381e
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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