Upstream information

CVE-2026-55737 at MITRE

Description

Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term format (ETF) binary to binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine.

When decoding a LARGE_TUPLE_EXT term, the validation pass decoded_size() in erts/emulator/beam/external.c reads the 32-bit arity field as unsigned (get_uint32()), while the decode pass dec_term() reads the same field as a signed 32-bit integer (get_int32()) into an int. An arity wire value of 0x80000000 passes validation as 2147483648 but decodes as -2147483648, so the subsequent hp += n moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit MAX_ARITYVAL. The result is an out-of-bounds heap write; in practice the VM detects an impossible heap size and aborts, denying service. The required padding is large when uncompressed but the compressed-ETF envelope shrinks it to a small payload on the wire.

This issue affects OTP from OTP 25.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to erts from 13.0 before 17.0.4, 16.4.0.4 and 15.2.7.11.

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 4
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network Local
Attack Complexity Low Low
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 5.1 5.1
Vector CVSS:4.0/AV:L/AC:L/AT:N/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:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Attack Vector Local Local
Attack Complexity Low Low
Attack Requirements None None
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: 1272910 [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 21:53:01 2026
CVE page last modified: Fri Aug 21 12:07:38 2026