{"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 (Live Patch 28 for SLE 15 SP5)","title":"Title of the patch"},{"category":"description","text":"This update for the Linux Kernel 5.14.21-150500_55_113 fixes one issue.\n\nThe following security issue was fixed:\n\n- CVE-2025-37797: net_sched: hfsc: Fix a UAF vulnerability in class handling (bsc#1245793).\n","title":"Description of the patch"},{"category":"details","text":"SUSE-2025-2671,SUSE-SLE-Module-Live-Patching-15-SP5-2025-2671","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-2025_02671-1.json"},{"category":"self","summary":"URL for SUSE-SU-2025:02671-1","url":"https://www.suse.com/support/update/announcement/2025/suse-su-202502671-1/"},{"category":"self","summary":"E-Mail link for SUSE-SU-2025:02671-1","url":"https://lists.suse.com/pipermail/sle-updates/2025-August/041068.html"},{"category":"self","summary":"SUSE Bug 1245793","url":"https://bugzilla.suse.com/1245793"},{"category":"self","summary":"SUSE CVE CVE-2025-37797 page","url":"https://www.suse.com/security/cve/CVE-2025-37797/"}],"title":"Security update for the Linux Kernel (Live Patch 28 for SLE 15 SP5)","tracking":{"current_release_date":"2025-08-04T12:38:45Z","generator":{"date":"2025-08-04T12:38:45Z","engine":{"name":"cve-database.git:bin/generate-csaf.pl","version":"1"}},"id":"SUSE-SU-2025:02671-1","initial_release_date":"2025-08-04T12:38:45Z","revision_history":[{"date":"2025-08-04T12:38:45Z","number":"1","summary":"Current version"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_version","name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le","product":{"name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le","product_id":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le"}}],"category":"architecture","name":"ppc64le"},{"branches":[{"category":"product_version","name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x","product":{"name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x","product_id":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x"}}],"category":"architecture","name":"s390x"},{"branches":[{"category":"product_version","name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64","product":{"name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64","product_id":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64"}}],"category":"architecture","name":"x86_64"},{"branches":[{"category":"product_name","name":"SUSE Linux Enterprise Live Patching 15 SP5","product":{"name":"SUSE Linux Enterprise Live Patching 15 SP5","product_id":"SUSE Linux Enterprise Live Patching 15 SP5","product_identification_helper":{"cpe":"cpe:/o:suse:sle-module-live-patching:15:sp5"}}}],"category":"product_family","name":"SUSE Linux Enterprise"}],"category":"vendor","name":"SUSE"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le as component of SUSE Linux Enterprise Live Patching 15 SP5","product_id":"SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le"},"product_reference":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le","relates_to_product_reference":"SUSE Linux Enterprise Live Patching 15 SP5"},{"category":"default_component_of","full_product_name":{"name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x as component of SUSE Linux Enterprise Live Patching 15 SP5","product_id":"SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x"},"product_reference":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x","relates_to_product_reference":"SUSE Linux Enterprise Live Patching 15 SP5"},{"category":"default_component_of","full_product_name":{"name":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64 as component of SUSE Linux Enterprise Live Patching 15 SP5","product_id":"SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64"},"product_reference":"kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64","relates_to_product_reference":"SUSE Linux Enterprise Live Patching 15 SP5"}]},"vulnerabilities":[{"cve":"CVE-2025-37797","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2025-37797"}],"notes":[{"category":"general","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: hfsc: Fix a UAF vulnerability in class handling\n\nThis patch fixes a Use-After-Free vulnerability in the HFSC qdisc class\nhandling. The issue occurs due to a time-of-check/time-of-use condition\nin hfsc_change_class() when working with certain child qdiscs like netem\nor codel.\n\nThe vulnerability works as follows:\n1. hfsc_change_class() checks if a class has packets (q.qlen != 0)\n2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g.,\n   codel, netem) might drop packets and empty the queue\n3. The code continues assuming the queue is still non-empty, adding\n   the class to vttree\n4. This breaks HFSC scheduler assumptions that only non-empty classes\n   are in vttree\n5. Later, when the class is destroyed, this can lead to a Use-After-Free\n\nThe fix adds a second queue length check after qdisc_peek_len() to verify\nthe queue wasn't emptied.","title":"CVE description"}],"product_status":{"recommended":["SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le","SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x","SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64"]},"references":[{"category":"external","summary":"CVE-2025-37797","url":"https://www.suse.com/security/cve/CVE-2025-37797"},{"category":"external","summary":"SUSE Bug 1242417 for CVE-2025-37797","url":"https://bugzilla.suse.com/1242417"},{"category":"external","summary":"SUSE Bug 1245793 for CVE-2025-37797","url":"https://bugzilla.suse.com/1245793"}],"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 Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le","SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x","SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64"]}],"scores":[{"cvss_v3":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"products":["SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le","SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.s390x","SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64"]}],"threats":[{"category":"impact","date":"2025-08-04T12:38:45Z","details":"important"}],"title":"CVE-2025-37797"}]}