SUSE Linux 15 SP7 Kernel RT Important Security Patch Update 2026-4170

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## This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.7.62 fixes various security issues: The following security issues were fixed: * CVE-2026-53360: KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use (bsc#1270303). * CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction (bsc#1275458). * CVE-2026-64561: KVM: x86: Check for invalid/obsolete root _after_ making MMU pages available (Zapscape) (bsc#1273232). * CVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP processing (SCTPhantom) (bsc#1274074). * CVE-2026-68138: net/sched: serialize qdisc_rtab_list against concurrent get/put (bsc#1274942). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like

## This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.7.62 fixes various security issues: The following security issues were fixed: * CVE-2026-53360: KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use (bsc#1270303). * CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction (bsc#1275458). * CVE-2026-64561: KVM: x86: Check for invalid/obsolete root _after_ making MMU pages available (Zapscape) (bsc#1273232). * CVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP processing (SCTPhantom) (bsc#1274074). * CVE-2026-68138: net/sched: serialize qdisc_rtab_list against concurrent get/put (bsc#1274942). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like

* CVE-2026-53360 ( 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-2026-53360 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

* CVE-2026-53360 ( NVD ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

* CVE-2026-64423 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-64423 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-64561 ( SUSE ): 9.3

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

* CVE-2026-64561 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Announcement ID: SUSE-SU-2026:4170-1 Release Date: 2026-09-14T09:34:37Z Rating: important

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