SUSE-SU-2026:21374-1: important: Security update for erlang

SLE-UPDATES null at suse.de
Tue Apr 28 16:32:04 UTC 2026 


# Security update for erlang

Announcement ID: SUSE-SU-2026:21374-1  
Release Date: 2026-04-22T10:52:20Z  
Rating: important  
References:

  * bsc#1258663
  * bsc#1259681
  * bsc#1259682
  * bsc#1259687
  * bsc#1261726
  * bsc#1261728
  * bsc#1261734
  * bsc#1262288

  
Cross-References:

  * CVE-2026-21620
  * CVE-2026-23941
  * CVE-2026-23942
  * CVE-2026-23943
  * CVE-2026-28808
  * CVE-2026-28810
  * CVE-2026-32144

  
CVSS scores:

  * CVE-2026-21620 ( SUSE ):  7.6
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-21620 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-21620 ( NVD ):  2.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/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
  * CVE-2026-23941 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-23941 ( SUSE ):  4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-23941 ( NVD ):  7.0
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L/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
  * CVE-2026-23942 ( SUSE ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-23942 ( SUSE ):  5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-23942 ( NVD ):  5.3
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/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
  * CVE-2026-23943 ( SUSE ):  6.9
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-23943 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-23943 ( NVD ):  6.9
    CVSS:4.0/AV:N/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
  * CVE-2026-28808 ( SUSE ):  9.1
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-28808 ( SUSE ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-28808 ( NVD ):  8.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/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
  * CVE-2026-28808 ( NVD ):  9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-28810 ( SUSE ):  8.2
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-28810 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  * CVE-2026-28810 ( NVD ):  6.3
    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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
  * CVE-2026-28810 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
  * CVE-2026-32144 ( SUSE ):  7.6
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-32144 ( SUSE ):  8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
  * CVE-2026-32144 ( NVD ):  7.6
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/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
  * CVE-2026-32144 ( NVD ):  7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves seven vulnerabilities and has one fix can now be
installed.

## Description:

This update for erlang fixes the following issues:

Security issues fixed:

  * CVE-2026-21620: improper isolation and compartmentalization can lead to TFTP
    relative path traversal and remote arbitrary reads/writes (bsc#1258663).
  * CVE-2026-23941: improper handling of duplicate Content-Length headers in
    Erlang OTP can lead to HTTP request smuggling (bsc#1259687).
  * CVE-2026-23942: improper limitation of a pathname to a restricted directory
    in the SFTP server can lead to path traversal (bsc#1259681).
  * CVE-2026-23943: improper handling of highly compressed data in Erlang OTP
    ssh can lead to denial of service (bsc#1259682).
  * CVE-2026-28808: incorrect authorization can lead to unauthenticated access
    to protected CGI scripts (bsc#1261728).
  * CVE-2026-28810: predictable DNS transaction IDs can lead to DNS cache
    poisoning (bsc#1261726).
  * CVE-2026-32144: missing signature verification can lead to OCSP
    authorization bypass and information disclosure (bsc#1261734).

Other updates and bugfixes:

  * jinterface: allow to build determenistic OtpErlang.jar (bsc#1262288).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-619=1

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-619=1

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * erlang-epmd-27.1.3-160000.4.1
    * erlang-debuginfo-27.1.3-160000.4.1
    * erlang-debugsource-27.1.3-160000.4.1
    * erlang-27.1.3-160000.4.1
    * erlang-epmd-debuginfo-27.1.3-160000.4.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * erlang-epmd-27.1.3-160000.4.1
    * erlang-debuginfo-27.1.3-160000.4.1
    * erlang-debugsource-27.1.3-160000.4.1
    * erlang-27.1.3-160000.4.1
    * erlang-epmd-debuginfo-27.1.3-160000.4.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-21620.html
  * https://www.suse.com/security/cve/CVE-2026-23941.html
  * https://www.suse.com/security/cve/CVE-2026-23942.html
  * https://www.suse.com/security/cve/CVE-2026-23943.html
  * https://www.suse.com/security/cve/CVE-2026-28808.html
  * https://www.suse.com/security/cve/CVE-2026-28810.html
  * https://www.suse.com/security/cve/CVE-2026-32144.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1258663
  * https://bugzilla.suse.com/show_bug.cgi?id=1259681
  * https://bugzilla.suse.com/show_bug.cgi?id=1259682
  * https://bugzilla.suse.com/show_bug.cgi?id=1259687
  * https://bugzilla.suse.com/show_bug.cgi?id=1261726
  * https://bugzilla.suse.com/show_bug.cgi?id=1261728
  * https://bugzilla.suse.com/show_bug.cgi?id=1261734
  * https://bugzilla.suse.com/show_bug.cgi?id=1262288

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