CVE-2026-68956Network attack vectorHinoki check available

Authenticated node crash via unbounded idle channels

Published Sep 22, 2026 · Updated Sep 22, 2026

Resource exhaustion in Erlang/OTP SSH before 27.3.4.18, 28.5.0.7, or 29.1.1 allows remote authenticated users to crash the node. ssh_connection:handle_msg/4 calls setup_session/5 for each idle session request and stores a channel record without applying max_channels. Valid SSH credentials and network access are required; one connection can exhaust VM memory and terminate every application on the node, without reading or writing data.

CVSS severity7.1
High
EPSS probability0.38%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource exhaustion in Erlang/OTP SSH before 27.3.4.18, 28.5.0.7, or 29.1.1 allows remote authenticated users to crash the node. ssh_connection:handle_msg/4 calls setup_session/5 for each idle session request and stores a channel record without applying max_channels. Valid SSH credentials and network access are required; one connection can exhaust VM memory and terminate every application on the node, without reading or writing data.

The record

CVE
CVE-2026-68956
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Erlang
Product
Erlang/OTP
Classifications
CWE-770, CAPEC-130, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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.

  1. Affected versionversion=17.0 <* changes=[{"at":"27.3.4.18","status":"unaffected"},{"at":"28.5.0.7","status":"unaffected"},{"at":"29.1.1","status":"unaffected"}]
  2. Affected versionversion=3.0.1 <* changes=[{"at":"5.2.11.13","status":"unaffected"},{"at":"5.5.2.6","status":"unaffected"},{"at":"6.0.6","status":"unaffected"}]
  3. Affected versionversion=84adefa331c4159d432d22840663c38f155cd4c1 <* changes=[{"at":"79c2d2be17d902c5f53969b5806b725efda831be","status":"unaffected"},{"at":"e18100975f0e5a8d59d02de00df12247a91b443b","status":"unaffected"},{"at":"e2bbad0107bba41491a4d549686fd023db8740da","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Erlang · Erlang/OTPversion=17.0 <* changes=[{"at":"27.3.4.18","status":"unaffected"},{"at":"28.5.0.7","status":"unaffected"},{"at":"29.1.1","status":"unaffected"}]; version=3.0.1 <* changes=[{"at":"5.2.11.13","status":"unaffected"},{"at":"5.5.2.6","status":"unaffected"},{"at":"6.0.6","status":"unaffected"}]; version=84adefa331c4159d432d22840663c38f155cd4c1 <* changes=[{"at":"79c2d2be17d902c5f53969b5806b725efda831be","status":"unaffected"},{"at":"e18100975f0e5a8d59d02de00df12247a91b443b","status":"unaffected"},{"at":"e2bbad0107bba41491a4d549686fd023db8740da","status":"unaffected"}]

Published CVSS scores

7.1Erlang/OTP GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499Endpoint Denial of Service

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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