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172
security advisoryUbuntuimportantUbuntu 26.04 libslirp Important Info Exposure CVE-2026-9539 Advisory 8550-1
libslirp could be made to expose sensitive information over the network.. ========================================================================== Ubuntu Security Notice USN-8550-1 July 15, 2026 libslirp vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: libslirp could be made to expose sensitive information over the network. Software Description: - libslirp: General purpose TCP-IP emulator library Details: It was discovered that libslirp incorrectly handled TCP urgent data. A privileged attacker inside a guest VM could possibly use this issue to obtain sensitive information from the host process memory. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS libslirp0 4.9.1-1ubuntu1.1 Ubuntu 24.04 LTS libslirp0 4.7.0-1ubuntu3.1 Ubuntu 22.04 LTS libslirp0 4.6.1-1ubuntu0.2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8550-1 CVE-2026-9539 Package Information: https://launchpad.net/ubuntu/+source/libslirp/4.9.1-1ubuntu1.1 https://launchpad.net/ubuntu/+source/libslirp/4.7.0-1ubuntu3.1 https://launchpad.net/ubuntu/+source/libslirp/4.6.1-1ubuntu0.2 . libslirp update for Ubuntu addresses critical confidentiality risk due to information exposure over the network.. Ubuntu libslirp security patch, network information exposure, Ubuntu advisory 8550-1, VM attack prevention, TCP-IP emulator security. . Severity: Important. LinuxSecurity.com Team
Jul 15, 2026
•Important
Ubuntu
202
security advisorymoderateinformation leakopenSUSE libslirp Moderate TCP Information Leak Fix Advisory 2026-2931-1
An update that solves one vulnerability can now be installed.. # Security update for libslirp Announcement ID: SUSE-SU-2026:2931-1 Release Date: 2026-07-13T18:43:58Z 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: * Basesystem Module 15-SP7 * openSUSE Leap 15.5 * SUSE Linux Enterprise Desktop 15 SP7 * SUSE Linux Enterprise Micro 5.5 * SUSE Linux Enterprise Real Time 15 SP7 * SUSE Linux Enterprise Server 15 SP7 * SUSE Linux Enterprise Server for SAP Applications 15 SP7 An update that solves one vulnerability can now be installed. ## Description: This update for libslirp fixes the following issues: * CVE-2026-9539: TCP URG out of bounds heap read information 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: * Basesystem Module 15-SP7 zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-2931=1 * SUSE Linux Enterprise Micro 5.5 zypper in -t patch SUSE-SLE-Micro-5.5-2026-2931=1 * openSUSE Leap 15.5 zypper in -t patch SUSE-2026-2931=1 ## Package List: * openSUSE Leap 15.5 (aarch64 i586 ppc64le s390x x86_64) * libslirp-devel-4.7.0+44-150500.4.3.1 * libslirp-debugsource-4.7.0+44-150500.4.3.1 * libslirp0-debuginfo-4.7.0+44-150500.4.3.1 * libslirp0-4.7.0+44-150500.4.3.1 * Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64) * libslirp-devel-4.7.0+44-150500.4.3.1 * libslirp0-debuginfo-4.7.0+44-150500.4.3.1 * libslirp0-4.7.0+44-150500.4.3.1 * libslirp-debugsource-4.7.0+44-150500.4.3.1 * SUSE Linux Enterprise Micro 5.5 (aarch64 ppc64le s390x x86_64) * libslirp0-4.7.0+44-150500.4.3.1 *libslirp-debugsource-4.7.0+44-150500.4.3.1 * libslirp0-debuginfo-4.7.0+44-150500.4.3.1 ## References: * https://www.suse.com/security/cve/CVE-2026-9539.html * https://bugzilla.suse.com/show_bug.cgi?id=1268903 . An update for openSUSE addresses a moderate security risk with libslirp, fixing an information leak vulnerability.. libslirp update, opensuse security, information leak fix. . Severity: moderate. LinuxSecurity.com Team
Jul 14, 2026
•moderate
OpenSUSE
100
security advisorymoderatethreatSUSE libslirp Moderate Memory Leak Threat Security Update 2026-2886-1
An update that solves one vulnerability can now be installed.. # 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 . SUSE releases a moderate security update for libslirp addressing CVE-2026-9539, improving system stability.. SUSE Linux, libslirp update, system security, openSUSE Leap. . Severity: moderate. LinuxSecurity.com Team
Jul 13, 2026
•moderate
SuSE
202
security advisorymoderatememory leakopenSUSE libslirp Moderate Memory Leak Integer Underflow CVE-2026-9539
An update that solves one vulnerability can now be installed.. # 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 . # Security update for libslirp Announcement ID: SUSE-SU-2026:2886-1 Release Date: 2026-07-13T10:09:1. update, solves, vulnerability, installed, security, libslirp, announc. . Severity: moderate. LinuxSecurity.com Team
Jul 13, 2026
•moderate
OpenSUSE
100
security advisorymoderateinformation leakSUSE Libslirp Moderate TCP URG Out of Bounds Issue SUSE-SU-2026-22514-1
An update that solves one vulnerability can now be installed.. # Security update for libslirp Announcement ID: SUSE-SU-2026:22514-1 Release Date: 2026-07-03T12:51:57Z 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: * SUSE Linux Micro 6.0 An update that solves one vulnerability can now be installed. ## Description: This update for libslirp fixes the following issue * CVE-2026-9539: TCP URG out of bounds heap read information 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 Micro 6.0 zypper in -t patch SUSE-SLE-Micro-6.0-780=1 ## Package List: * SUSE Linux Micro 6.0 (aarch64 s390x x86_64) * libslirp-debugsource-4.7.0+44-5.1 * libslirp0-debuginfo-4.7.0+44-5.1 * libslirp0-4.7.0+44-5.1 ## References: * https://www.suse.com/security/cve/CVE-2026-9539.html * https://bugzilla.suse.com/show_bug.cgi?id=1268903 . Install the latest SUSE update for libslirp to patch a moderate severity TCP URG heap read information leak issue.. SUSE libslirp update TCP information leak patch. . Severity: moderate. LinuxSecurity.com Team
Jul 08, 2026
•moderate
SuSE
100
security advisorymoderateinformation leakSUSE Linux Micro 6.1 libslirp Moderate TCP Information Leak CVE-2026-9539
An update that solves one vulnerability can now be installed.. # Security update for libslirp Announcement ID: SUSE-SU-2026:22452-1 Release Date: 2026-06-30T09:31:12Z 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: * SUSE Linux Micro 6.1 An update that solves one vulnerability can now be installed. ## Description: This update for libslirp fixes the following issue * CVE-2026-9539: TCP URG out of bounds heap read information 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 Micro 6.1 zypper in -t patch SUSE-SLE-Micro-6.1-600=1 ## Package List: * SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64) * libslirp0-debuginfo-4.8.0+2-slfo.1.1_2.1 * libslirp-debugsource-4.8.0+2-slfo.1.1_2.1 * libslirp0-4.8.0+2-slfo.1.1_2.1 ## References: * https://www.suse.com/security/cve/CVE-2026-9539.html * https://bugzilla.suse.com/show_bug.cgi?id=1268903 . Update addresses a moderate security issue in libslirp with CVE-2026-9539, improving system safety.. libslirp security update, SUSE Linux patch, CVE-2026-9539 fix. . Severity: moderate. LinuxSecurity.com Team
Jul 03, 2026
•moderate
SuSE
202
security advisorymoderateinformation leakopenSUSE Leap 16.0 libslirp Moderate TCP Leak Vulnerability 2026-21216-1
An update that solves one vulnerability and has one bug fix can now be installed.. openSUSE security update: security update for libslirp ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:21216-1 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 Affected Products: openSUSE Leap 16.0 ------------------------------------------------------------- An update that solves one vulnerability and has one bug fix can now be installed. Description: This update for libslirp fixes the following issue - CVE-2026-9539: TCP URG out of bounds heap read information leak (bsc#1268903). Patch instructions: To install this openSUSE security update use the suse recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: - openSUSE Leap 16.0 zypper in -t patch openSUSE-Leap-16.0-1142=1 Package List: - openSUSE Leap 16.0: libslirp-devel-4.8.0+2-160000.3.1 libslirp0-4.8.0+2-160000.3.1 References: * https://www.suse.com/security/cve/CVE-2026-9539.html . A security update for openSUSE addresses a moderate flaw in libslirp, resolving a TCP information leak issue.. openSUSE security update, libslirp flaw, TCP leak vulnerability, information leak fix. . Severity: moderate. LinuxSecurity.com Team
Jul 03, 2026
•moderate
OpenSUSE
202
security advisorymoderateinformation disclosureopenSUSE Leap Micro 5.2: 2022:2941-1 Moderate: libslirp Enhancement
An update that solves one vulnerability and has one errata is now available. . openSUSE Security Update: Security update for libslirp ______________________________________________________________________________ Announcement ID: openSUSE-SU-2022:2941-1 Rating: moderate References: #1187365 #1201551 Cross-References: CVE-2021-3593 CVSS scores: CVE-2021-3593 (NVD) : 3.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N CVE-2021-3593 (SUSE): 3.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N Affected Products: openSUSE Leap Micro 5.2 ______________________________________________________________________________ An update that solves one vulnerability and has one errata is now available. Description: This update for libslirp fixes the following issues: - CVE-2021-3593: Fixed invalid pointer initialization may lead to information disclosure (udp6) (bsc#1187365). Non-security fixes: - Fix the version header (bsc#1201551) Patch Instructions: To install this openSUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: - openSUSE Leap Micro 5.2: zypper in -t patch openSUSE-Leap-Micro-5.2-2022-2941=1 Package List: - openSUSE Leap Micro 5.2 (aarch64 x86_64): libslirp-debugsource-4.3.1-150300.11.1 libslirp0-4.3.1-150300.11.1 libslirp0-debuginfo-4.3.1-150300.11.1 References: https://www.suse.com/security/cve/CVE-2021-3593.html https://bugzilla.suse.com/1187365 https://bugzilla.suse.com/1201551 . The latest security enhancement for libslirp in openSUSE addresses a critical information exposure flaw and offers detailed guidance on applying the necessary patches.. openSUSE Leap Micro, libslirp update, information disclosure fix. . LinuxSecurity.com Team
Sep 01, 2022
OpenSUSE
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