{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_security_advisory","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"Security update for the Linux Kernel RT (Live Patch 2 for SUSE Linux Enterprise 16)","title":"Title of the patch"},{"category":"description","text":"\nThis update for the SUSE Linux Enterprise kernel 6.12.0-160000.7.1 fixes one security issue\n\nThe following security issue was fixed:\n\n- CVE-2025-40212: nfsd: fix refcount leak in nfsd_set_fh_dentry() (bsc#1254196).\n","title":"Description of the patch"},{"category":"details","text":"SUSE-SL-Micro-6.2-191","title":"Patchnames"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"SUSE ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"self","summary":"URL of this CSAF notice","url":"https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_20165-1.json"},{"category":"self","summary":"URL for SUSE-SU-2026:20165-1","url":"https://www.suse.com/support/update/announcement/2026/suse-su-202620165-1/"},{"category":"self","summary":"E-Mail link for SUSE-SU-2026:20165-1","url":"https://lists.suse.com/pipermail/sle-security-updates/2026-January/023941.html"},{"category":"self","summary":"SUSE Bug 1254196","url":"https://bugzilla.suse.com/1254196"},{"category":"self","summary":"SUSE CVE CVE-2025-40212 page","url":"https://www.suse.com/security/cve/CVE-2025-40212/"}],"title":"Security update for the Linux Kernel RT (Live Patch 2 for SUSE Linux Enterprise 16)","tracking":{"current_release_date":"2026-01-26T09:12:02Z","generator":{"date":"2026-01-26T09:12:02Z","engine":{"name":"cve-database.git:bin/generate-csaf.pl","version":"1"}},"id":"SUSE-SU-2026:20165-1","initial_release_date":"2026-01-26T09:12:02Z","revision_history":[{"date":"2026-01-26T09:12:02Z","number":"1","summary":"Current version"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_version","name":"kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64","product":{"name":"kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64","product_id":"kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64"}}],"category":"architecture","name":"x86_64"},{"branches":[{"category":"product_name","name":"SUSE Linux Micro 6.2","product":{"name":"SUSE Linux Micro 6.2","product_id":"SUSE Linux Micro 6.2","product_identification_helper":{"cpe":"cpe:/o:suse:sles:16:16.0:transactional"}}}],"category":"product_family","name":"SUSE Linux Enterprise"}],"category":"vendor","name":"SUSE"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64 as component of SUSE Linux Micro 6.2","product_id":"SUSE Linux Micro 6.2:kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64"},"product_reference":"kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64","relates_to_product_reference":"SUSE Linux Micro 6.2"}]},"vulnerabilities":[{"cve":"CVE-2025-40212","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2025-40212"}],"notes":[{"category":"general","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix refcount leak in nfsd_set_fh_dentry()\n\nnfsd exports a \"pseudo root filesystem\" which is used by NFSv4 to find\nthe various exported filesystems using LOOKUP requests from a known root\nfilehandle.  NFSv3 uses the MOUNT protocol to find those exported\nfilesystems and so is not given access to the pseudo root filesystem.\n\nIf a v3 (or v2) client uses a filehandle from that filesystem,\nnfsd_set_fh_dentry() will report an error, but still stores the export\nin \"struct svc_fh\" even though it also drops the reference (exp_put()).\nThis means that when fh_put() is called an extra reference will be dropped\nwhich can lead to use-after-free and possible denial of service.\n\nNormal NFS usage will not provide a pseudo-root filehandle to a v3\nclient.  This bug can only be triggered by the client synthesising an\nincorrect filehandle.\n\nTo fix this we move the assignments to the svc_fh later, after all\npossible error cases have been detected.","title":"CVE description"}],"product_status":{"recommended":["SUSE Linux Micro 6.2:kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64"]},"references":[{"category":"external","summary":"CVE-2025-40212","url":"https://www.suse.com/security/cve/CVE-2025-40212"},{"category":"external","summary":"SUSE Bug 1254195 for CVE-2025-40212","url":"https://bugzilla.suse.com/1254195"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["SUSE Linux Micro 6.2:kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64"]}],"scores":[{"cvss_v3":{"baseScore":7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"products":["SUSE Linux Micro 6.2:kernel-livepatch-6_12_0-160000_7-rt-2-160000.1.1.x86_64"]}],"threats":[{"category":"impact","date":"2026-01-26T09:12:02Z","details":"important"}],"title":"CVE-2025-40212"}]}