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openSUSE libslirp Moderate Memory Leak Integer Underflow CVE-2026-9539

opensuse
Calendar Grey July 13, 2026
Dist Opensuse Esm H88
Critical update for openSUSE addressing security issue in libslirp, fixing memory leak and integer underflow vulnerability.
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).

Topics%20covered

Topics Covered

security advisory moderate memory leak integer underflow OpenSUSE libslirp

Patch

## 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

* bsc#1268903

## References:

* https://www.suse.com/security/cve/CVE-2026-9539.html

* https://bugzilla.suse.com/show_bug.cgi?id=1268903

Severity
moderate
Lowest
Low
Medium
High
Critical

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

Topics%20covered

Topics Covered

security advisory moderate memory leak integer underflow OpenSUSE libslirp

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