Upstream information

CVE-2026-42792 at MITRE

Description

Improper Handling of Exceptional Conditions vulnerability in Erlang OTP erts (epmd) allows an unauthenticated remote attacker to permanently terminate the Erlang Port Mapper Daemon (epmd) via connection slot exhaustion.

The do_accept function in erts/epmd/src/epmd_srv.c calls epmd_cleanup_exit() when accept(2) returns EMFILE (per-process file descriptor limit reached) or ENFILE (system-wide file descriptor limit reached), rather than treating these as recoverable conditions. An attacker can exhaust epmd's file descriptor slots by holding many TCP connections open while periodically sending a single byte to reset the idle timeout, then causing accept(2) to return EMFILE, which kills the daemon. epmd has no per-source-IP connection cap, making the attack feasible from a single source.

On Debian/Ubuntu default packaging the impact is amplified: the systemd unit inherits a low file descriptor soft limit, and repeated daemon deaths trigger systemd's start-rate-limit, permanently failing both epmd.service and epmd.socket and requiring manual operator intervention to recover.

This issue affects OTP from OTP 17.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail National Vulnerability Database SUSE
Base Score 7.5 3.7
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network Network
Attack Complexity Low High
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High Low
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail CNA (6b3ad84c-e1a6-4bf7-a703-f496b71e49db) SUSE
Base Score 6.3 6.3
Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Attack Vector Network Network
Attack Complexity Low Low
Attack Requirements Present Present
Privileges Required None None
User Interaction None None
Vulnerable System Confidentiality Impact None None
Vulnerable System Integrity Impact None None
Vulnerable System Availability Impact Low Low
Subsequent System Confidentiality Impact None None
Subsequent System Integrity Impact None None
Subsequent System Availability Impact None None
CVSSv4 Version 4.0 4.0
SUSE Bugzilla entry: 1272908 [IN_PROGRESS]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3645
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-3645
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-3645
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-3645
SUSE Linux Enterprise High Performance Computing 15 SP7
SUSE Linux Enterprise Module for Server Applications 15 SP7
SUSE Linux Enterprise Server 15 SP7
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
  • erlang26 >= 26.2.1-150300.7.28.1
  • erlang26-epmd >= 26.2.1-150300.7.28.1
 Patchnames:
SUSE-SLE-Module-Server-Applications-15-SP7-2026-3579
SUSE-SLE-Module-Server-Applications-15-SP7-2026-3645
SUSE Linux Enterprise Server 15 SP4-LTSS
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-3645
SUSE Linux Enterprise Server 15 SP5-LTSS
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-3645
SUSE Linux Enterprise Server 15 SP6-LTSS
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
  • erlang26 >= 26.2.1-150300.7.28.1
  • erlang26-epmd >= 26.2.1-150300.7.28.1
 Patchnames:
SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3579
SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3645
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP4-2026-3645
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP5-2026-3645
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
  • erlang26 >= 26.2.1-150300.7.28.1
  • erlang26-epmd >= 26.2.1-150300.7.28.1
 Patchnames:
SUSE-SLE-Product-SLES_SAP-15-SP6-2026-3579
SUSE-SLE-Product-SLES_SAP-15-SP6-2026-3645
SUSE Manager Proxy LTS 4.3
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-SUSE-Manager-Proxy-4.3-LTS-2026-3645
SUSE Manager Retail Branch Server LTS 4.3
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.3-LTS-2026-3645
SUSE Manager Server LTS 4.3
  • erlang >= 23.3.4.19-150300.3.39.1
  • erlang-epmd >= 23.3.4.19-150300.3.39.1
 Patchnames:
SUSE-SLE-Product-SUSE-Manager-Server-4.3-LTS-2026-3645
openSUSE Tumbleweed
  • erlang >= 28.5.0.4-1.1
  • erlang-debugger >= 28.5.0.4-1.1
  • erlang-debugger-src >= 28.5.0.4-1.1
  • erlang-dialyzer >= 28.5.0.4-1.1
  • erlang-dialyzer-src >= 28.5.0.4-1.1
  • erlang-diameter >= 28.5.0.4-1.1
  • erlang-diameter-src >= 28.5.0.4-1.1
  • erlang-doc >= 28.5.0.4-1.1
  • erlang-epmd >= 28.5.0.4-1.1
  • erlang-et >= 28.5.0.4-1.1
  • erlang-et-src >= 28.5.0.4-1.1
  • erlang-jinterface >= 28.5.0.4-1.1
  • erlang-jinterface-src >= 28.5.0.4-1.1
  • erlang-observer >= 28.5.0.4-1.1
  • erlang-observer-src >= 28.5.0.4-1.1
  • erlang-reltool >= 28.5.0.4-1.1
  • erlang-reltool-src >= 28.5.0.4-1.1
  • erlang-src >= 28.5.0.4-1.1
  • erlang-wx >= 28.5.0.4-1.1
  • erlang-wx-src >= 28.5.0.4-1.1
  • erlang27 >= 27.1.3-3.1
  • erlang27-debugger >= 27.1.3-3.1
  • erlang27-debugger-src >= 27.1.3-3.1
  • erlang27-dialyzer >= 27.1.3-3.1
  • erlang27-dialyzer-src >= 27.1.3-3.1
  • erlang27-diameter >= 27.1.3-3.1
  • erlang27-diameter-src >= 27.1.3-3.1
  • erlang27-doc >= 27.1.3-3.1
  • erlang27-epmd >= 27.1.3-3.1
  • erlang27-et >= 27.1.3-3.1
  • erlang27-et-src >= 27.1.3-3.1
  • erlang27-jinterface >= 27.1.3-3.1
  • erlang27-jinterface-src >= 27.1.3-3.1
  • erlang27-observer >= 27.1.3-3.1
  • erlang27-observer-src >= 27.1.3-3.1
  • erlang27-reltool >= 27.1.3-3.1
  • erlang27-reltool-src >= 27.1.3-3.1
  • erlang27-src >= 27.1.3-3.1
  • erlang27-wx >= 27.1.3-3.1
  • erlang27-wx-src >= 27.1.3-3.1
 Patchnames:
openSUSE-Tumbleweed-2026-11559
openSUSE-Tumbleweed-2026-11560

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP7 erlang Released
SUSE Linux Enterprise High Performance Computing 15 SP7 erlang26 Released
SUSE Linux Enterprise Module for Server Applications 15 SP7 erlang Released
SUSE Linux Enterprise Module for Server Applications 15 SP7 erlang26 Released
SUSE Linux Enterprise Server 15 SP7 erlang Released
SUSE Linux Enterprise Server 15 SP7 erlang26 Released
SUSE Linux Enterprise Server 16.0 erlang Affected
SUSE Linux Enterprise Server 16.1 erlang Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 erlang Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 erlang26 Released
SUSE Linux Enterprise Server for SAP applications 16.0 erlang Affected
SUSE Linux Enterprise Server for SAP applications 16.1 erlang Released
openSUSE Leap 16.0 erlang Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS erlang Released
SUSE Linux Enterprise High Performance Computing 15 SP5 erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS erlang Released
SUSE Linux Enterprise Module for Server Applications 15 SP4 erlang Affected
SUSE Linux Enterprise Module for Server Applications 15 SP5 erlang Affected
SUSE Linux Enterprise Module for Server Applications 15 SP6 erlang Affected
SUSE Linux Enterprise Module for Server Applications 15 SP6 erlang26 Affected
SUSE Linux Enterprise Server 15 SP4 erlang Affected
SUSE Linux Enterprise Server 15 SP4-LTSS erlang Released
SUSE Linux Enterprise Server 15 SP5 erlang Affected
SUSE Linux Enterprise Server 15 SP5-LTSS erlang Released
SUSE Linux Enterprise Server 15 SP6 erlang Affected
SUSE Linux Enterprise Server 15 SP6 erlang26 Affected
SUSE Linux Enterprise Server 15 SP6-LTSS erlang Released
SUSE Linux Enterprise Server 15 SP6-LTSS erlang26 Released
SUSE Linux Enterprise Server for SAP Applications 15 SP4 erlang Released
SUSE Linux Enterprise Server for SAP Applications 15 SP5 erlang Released
SUSE Linux Enterprise Server for SAP Applications 15 SP6 erlang Released
SUSE Linux Enterprise Server for SAP Applications 15 SP6 erlang26 Released
SUSE Manager Proxy 4.3 erlang Affected
SUSE Manager Proxy LTS 4.3 erlang Released
SUSE Manager Retail Branch Server 4.3 erlang Affected
SUSE Manager Retail Branch Server LTS 4.3 erlang Released
SUSE Manager Server 4.3 erlang Affected
SUSE Manager Server LTS 4.3 erlang Released
Products past their end of life and not receiving proactive updates anymore.
SUSE Enterprise Storage 7 erlang Affected
SUSE Enterprise Storage 7.1 erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP2 erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP4 erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS erlang Released
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS erlang Released
SUSE Linux Enterprise High Performance Computing 15 SP6 erlang Affected
SUSE Linux Enterprise High Performance Computing 15 SP6 erlang26 Affected
SUSE Linux Enterprise Module for Server Applications 15 SP2 erlang Affected
SUSE Linux Enterprise Module for Server Applications 15 SP3 erlang Affected
SUSE Linux Enterprise Real Time 15 SP2 erlang Affected
SUSE Linux Enterprise Real Time 15 SP3 erlang Affected
SUSE Linux Enterprise Real Time 15 SP4 erlang Affected
SUSE Linux Enterprise Server 15 SP2 erlang Affected
SUSE Linux Enterprise Server 15 SP2-BCL erlang Affected
SUSE Linux Enterprise Server 15 SP2-LTSS erlang Affected
SUSE Linux Enterprise Server 15 SP3 erlang Affected
SUSE Linux Enterprise Server 15 SP3-BCL erlang Affected
SUSE Linux Enterprise Server 15 SP3-LTSS erlang Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 erlang Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 erlang Affected
SUSE Manager Proxy 4.1 erlang Affected
SUSE Manager Proxy 4.2 erlang Affected
SUSE Manager Retail Branch Server 4.1 erlang Affected
SUSE Manager Retail Branch Server 4.2 erlang Affected
SUSE Manager Server 4.1 erlang Affected
SUSE Manager Server 4.2 erlang Affected
openSUSE Leap 15.3 erlang Released
openSUSE Leap 15.3 erlang26 Released
openSUSE Leap 15.4 erlang Affected
openSUSE Leap 15.5 erlang Affected
openSUSE Leap 15.6 erlang Affected
openSUSE Leap 15.6 erlang26 Affected

SUSE Timeline for this CVE

CVE page created: Wed Jul 29 21:43:46 2026
CVE page last modified: Fri Aug 21 11:59:41 2026