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SUSE Linus Libvirt Moderate Security Fix Advisory 2026-3939

SUSE Linus Libvirt Moderate Security Fix Advisory 2026-3939

Linuxsecurity •LinuxSecurity Advisories • September 3, 2026

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## This update for libvirt fixes the following issues: * CVE-2026-18917: remote: Fix integer overflow in RPC handler for virNodeGetFreePages (bsc#1275863) * CVE-2026-63622: util: virFileChownFiles: do not follow symlinks (bsc#1275264) * CVE-2026-63623: storage: create images with a private umask during qemu-img create/convert (bsc#12075265) * CVE-2026-77159: qemu: tpm: Avoid following symlinks when chown'ing log file (bsc#1274946) * CVE-2026-61477: Reject line breaks in network config (bsc#1274576) * qemu: Fix invocation of numa-preplace when hugepages requested, but page size not specified (bsc#1266364) * Add ClearwaterForest CPU model (jsc#PED-16192) ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

## This update for libvirt fixes the following issues: * CVE-2026-18917: remote: Fix integer overflow in RPC handler for virNodeGetFreePages (bsc#1275863) * CVE-2026-63622: util: virFileChownFiles: do not follow symlinks (bsc#1275264) * CVE-2026-63623: storage: create images with a private umask during qemu-img create/convert (bsc#12075265) * CVE-2026-77159: qemu: tpm: Avoid following symlinks when chown'ing log file (bsc#1274946) * CVE-2026-61477: Reject line breaks in network config (bsc#1274576) * qemu: Fix invocation of numa-preplace when hugepages requested, but page size not specified (bsc#1266364) * Add ClearwaterForest CPU model (jsc#PED-16192) ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

* 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-2026:3939-1 Release Date: 2026-09-03T07:32:06Z Rating: moderate

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