SUSE-SU-2026:2886-1: moderate: Security update for libslirp

[SLE-UPDATES]

# Security update for libslirp

Announcement ID: SUSE-SU-2026:2886-1  
Release Date: 2026-07-13T10:09:11Z  
Rating: moderate  
References:

  * bsc#1268903

  
Cross-References:

  * CVE-2026-9539

  
CVSS scores:

  * CVE-2026-9539 ( SUSE ):  6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
  * CVE-2026-9539 ( NVD ):  6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

  
Affected Products:

  * openSUSE Leap 15.3
  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Micro for Rancher 5.3
  * SUSE Linux Enterprise Micro for Rancher 5.4

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for libslirp fixes the following issues:

  * CVE-2026-9539: crafted TCP segment with manipulated URG flags and urgent
    pointers can cause an integer underflow and host-heap memory leak
    (bsc#1268903).

## 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 Micro for Rancher 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-2886=1

  * SUSE Linux Enterprise Micro 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-2886=1

  * openSUSE Leap 15.3  
    zypper in -t patch SUSE-2026-2886=1

  * SUSE Linux Enterprise Micro for Rancher 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-2886=1

  * SUSE Linux Enterprise Micro 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-2886=1

## Package List:

  * openSUSE Leap 15.3 (aarch64 i586 ppc64le s390x x86_64)
    * libslirp-debugsource-4.7.0+44-150300.18.1
    * libslirp-devel-4.7.0+44-150300.18.1
    * libslirp0-4.7.0+44-150300.18.1
    * libslirp0-debuginfo-4.7.0+44-150300.18.1
  * SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 s390x x86_64)
    * libslirp-debugsource-4.7.0+44-150300.18.1
    * libslirp0-4.7.0+44-150300.18.1
    * libslirp0-debuginfo-4.7.0+44-150300.18.1
  * SUSE Linux Enterprise Micro 5.3 (aarch64 s390x x86_64)
    * libslirp-debugsource-4.7.0+44-150300.18.1
    * libslirp0-4.7.0+44-150300.18.1
    * libslirp0-debuginfo-4.7.0+44-150300.18.1
  * SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 s390x x86_64)
    * libslirp0-debuginfo-4.7.0+44-150300.18.1
    * libslirp0-4.7.0+44-150300.18.1
    * libslirp-debugsource-4.7.0+44-150300.18.1
  * SUSE Linux Enterprise Micro 5.4 (aarch64 s390x x86_64)
    * libslirp0-debuginfo-4.7.0+44-150300.18.1
    * libslirp0-4.7.0+44-150300.18.1
    * libslirp-debugsource-4.7.0+44-150300.18.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-9539.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1268903

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