suse-su-2025:02671-1
Vulnerability from csaf_suse
Published
2025-08-04 12:38
Modified
2025-08-04 12:38
Summary
Security update for the Linux Kernel (Live Patch 28 for SLE 15 SP5)
Notes
Title of the patch
Security update for the Linux Kernel (Live Patch 28 for SLE 15 SP5)
Description of the patch
This update for the Linux Kernel 5.14.21-150500_55_113 fixes one issue.
The following security issue was fixed:
- CVE-2025-37797: net_sched: hfsc: Fix a UAF vulnerability in class handling (bsc#1245793).
Patchnames
SUSE-2025-2671,SUSE-SLE-Module-Live-Patching-15-SP5-2025-2671
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
{
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"text": "important"
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"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright 2024 SUSE LLC. All rights reserved.",
"tlp": {
"label": "WHITE",
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"lang": "en",
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"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"
},
{
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"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"
}
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"publisher": {
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"contact_details": "https://www.suse.com/support/security/contact/",
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"summary": "SUSE ratings",
"url": "https://www.suse.com/support/security/rating/"
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"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"
},
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"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"
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"id": "SUSE-SU-2025:02671-1",
"initial_release_date": "2025-08-04T12:38:45Z",
"revision_history": [
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"date": "2025-08-04T12:38:45Z",
"number": "1",
"summary": "Current version"
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],
"status": "final",
"version": "1"
}
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"product_tree": {
"branches": [
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"branches": [
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"branches": [
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"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",
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"category": "architecture",
"name": "ppc64le"
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}
}
],
"category": "architecture",
"name": "s390x"
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"name": "kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.x86_64",
"product": {
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"category": "architecture",
"name": "x86_64"
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{
"branches": [
{
"category": "product_name",
"name": "SUSE Linux Enterprise Live Patching 15 SP5",
"product": {
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"name": "SUSE Linux Enterprise"
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"product_id": "SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_113-default-2-150500.2.1.ppc64le"
},
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"relates_to_product_reference": "SUSE Linux Enterprise Live Patching 15 SP5"
},
{
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"full_product_name": {
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"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"
},
{
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},
"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\u0027t emptied.",
"title": "CVE description"
}
],
"product_status": {
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"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"
]
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"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"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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