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SUSE Linux Micro 6.0 Important Kernel Security Update 2026-23025

SUSE Linux Micro 6.0 Important Kernel Security Update 2026-23025

Linuxsecurity •LinuxSecurity Advisories • August 11, 2026

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## This update for the SUSE Linux Enterprise Kernel 6.4.0-31.1 fixes various security issues: The following security issues were fixed: * CVE-2026-23240: tls: Fix race condition in tls_sw_cancel_work_tx() (bsc#1262404). * CVE-2026-31738: vxlan: validate ND option lengths in vxlan_na_create (bsc#1264060). * CVE-2026-43038: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (bsc#1271648). * CVE-2026-46113: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (bsc#1266970). * CVE-2026-53359: KVM: x86: Fix shadow paging use-after-free due to unexpected role (bsc#1270060). * CVE-2026-53366: ipv4: account for fraggap on the paged allocation path (bsc#1271370). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like

## This update for the SUSE Linux Enterprise Kernel 6.4.0-31.1 fixes various security issues: The following security issues were fixed: * CVE-2026-23240: tls: Fix race condition in tls_sw_cancel_work_tx() (bsc#1262404). * CVE-2026-31738: vxlan: validate ND option lengths in vxlan_na_create (bsc#1264060). * CVE-2026-43038: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (bsc#1271648). * CVE-2026-46113: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (bsc#1266970). * CVE-2026-53359: KVM: x86: Fix shadow paging use-after-free due to unexpected role (bsc#1270060). * CVE-2026-53366: ipv4: account for fraggap on the paged allocation path (bsc#1271370). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like

* CVE-2026-23240 ( SUSE ): 7.3

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

* CVE-2026-23240 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-23240 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-31738 ( SUSE ): 7.3

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

* CVE-2026-31738 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

* CVE-2026-31738 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-43038 ( SUSE ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Announcement ID: SUSE-SU-2026:23025-1 Release Date: 2026-07-28T16:11:16Z Rating: important

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