SUSE libvirt Important Buffer Overflow Priv Escalation Vuln 2026-23445

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## This update for libvirt fixes the following issues: * CVE-2026-18917: Integer overflow in NodeGetFreePages RPC handler leading to heap buffer overflow (bsc#1275863). * CVE-2026-61477: newline injection in network XML DNS TXT/SRV fields allows dnsmasq config directive injection (bsc#1274576). * CVE-2026-63622: `swtpm` privilege escalation via symlink following (bsc#1275264). * CVE-2026-63623: information disclosure via world-readable storage volume images during clone/convert (bsc#1275265). * CVE-2026-77159: root `chown()` on `swtpm` logfile follows symlinks (bsc#1274946). Changes for libvirt: * rpc: avoid leak of GSource in use for interrupting main loop bsc#1258345 ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like

## This update for libvirt fixes the following issues: * CVE-2026-18917: Integer overflow in NodeGetFreePages RPC handler leading to heap buffer overflow (bsc#1275863). * CVE-2026-61477: newline injection in network XML DNS TXT/SRV fields allows dnsmasq config directive injection (bsc#1274576). * CVE-2026-63622: `swtpm` privilege escalation via symlink following (bsc#1275264). * CVE-2026-63623: information disclosure via world-readable storage volume images during clone/convert (bsc#1275265). * CVE-2026-77159: root `chown()` on `swtpm` logfile follows symlinks (bsc#1274946). Changes for libvirt: * rpc: avoid leak of GSource in use for interrupting main loop bsc#1258345 ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like

* CVE-2026-18917 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-18917 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-61477 ( SUSE ): 5.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

* CVE-2026-61477 ( SUSE ): 2.3 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

* CVE-2026-61477 ( NVD ): 2.3 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

* CVE-2026-63622 ( SUSE ): 8.5

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

* CVE-2026-63622 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Announcement ID: SUSE-SU-2026:23445-1 Release Date: 2026-09-02T09:39:32Z Rating: important

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