{"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","title":"Title of the patch"},{"category":"description","text":"\nThe SUSE Linux Enterprise 11 SP4 kernel was updated to fix various security issues\n\nThe following security issues were fixed:\n\n- CVE-2021-0920: net: split out functions related to registering inflight socket files (bsc#1193731).\n- CVE-2025-38177: sch_hfsc: make hfsc_qlen_notify() idempotent (bsc#1245986).\n","title":"Description of the patch"},{"category":"details","text":"SUSE-2026-688,SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-688","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_0688-1.json"},{"category":"self","summary":"URL for SUSE-SU-2026:0688-1","url":"https://www.suse.com/support/update/announcement/2026/suse-su-20260688-1/"},{"category":"self","summary":"E-Mail link for SUSE-SU-2026:0688-1","url":"https://lists.suse.com/pipermail/sle-security-updates/2026-February/024506.html"},{"category":"self","summary":"SUSE Bug 1193731","url":"https://bugzilla.suse.com/1193731"},{"category":"self","summary":"SUSE Bug 1245986","url":"https://bugzilla.suse.com/1245986"},{"category":"self","summary":"SUSE CVE CVE-2021-0920 page","url":"https://www.suse.com/security/cve/CVE-2021-0920/"},{"category":"self","summary":"SUSE CVE CVE-2025-38177 page","url":"https://www.suse.com/security/cve/CVE-2025-38177/"}],"title":"Security update for the Linux Kernel","tracking":{"current_release_date":"2026-02-27T15:09:04Z","generator":{"date":"2026-02-27T15:09:04Z","engine":{"name":"cve-database.git:bin/generate-csaf.pl","version":"1"}},"id":"SUSE-SU-2026:0688-1","initial_release_date":"2026-02-27T15:09:04Z","revision_history":[{"date":"2026-02-27T15:09:04Z","number":"1","summary":"Current 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This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel","title":"CVE description"}],"product_status":{"recommended":["SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-base-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-devel-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-docs-3.0.101-108.201.1.noarch","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-base-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-devel-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-source-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise 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CVE-2021-0920","url":"https://bugzilla.suse.com/1194463"},{"category":"external","summary":"SUSE Bug 1195939 for CVE-2021-0920","url":"https://bugzilla.suse.com/1195939"},{"category":"external","summary":"SUSE Bug 1199255 for CVE-2021-0920","url":"https://bugzilla.suse.com/1199255"},{"category":"external","summary":"SUSE Bug 1200084 for CVE-2021-0920","url":"https://bugzilla.suse.com/1200084"}],"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 Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-base-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-devel-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-docs-3.0.101-108.201.1.noarch","SUSE Linux 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resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let's make it idempotent\nto ease qdisc_tree_reduce_backlog() callers' life:\n\n1. update_vf() decreases cl->cl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl->el_node, but we can use\n   RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.","title":"CVE description"}],"product_status":{"recommended":["SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-base-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-devel-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-docs-3.0.101-108.201.1.noarch","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-base-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME 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CVE-2025-38177","url":"https://bugzilla.suse.com/1237312"},{"category":"external","summary":"SUSE Bug 1245986 for CVE-2025-38177","url":"https://bugzilla.suse.com/1245986"},{"category":"external","summary":"SUSE Bug 1246356 for CVE-2025-38177","url":"https://bugzilla.suse.com/1246356"},{"category":"external","summary":"SUSE Bug 1247374 for CVE-2025-38177","url":"https://bugzilla.suse.com/1247374"}],"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 Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-base-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-devel-3.0.101-108.201.1.x86_64","SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-docs-3.0.101-108.201.1.noarch","SUSE 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