RHSA-2025:17109
Vulnerability from csaf_redhat - Published: 2025-09-30 17:24 - Updated: 2026-11-11 18:56Summary
Red Hat Security Advisory: kernel-rt security update
Severity
Moderate
Notes
Topic: An update for kernel-rt is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: ALSA: usb-audio: ALSA USB Audio Out-of-Bounds Bug (CVE-2022-48701)
* kernel: net: usb: smsc75xx: Limit packet length to skb->len (CVE-2023-53125)
* kernel: ALSA: bcd2000: Fix a UAF bug on the error path of probing (CVE-2022-50229)
* kernel: md-raid10: fix KASAN warning (CVE-2022-50211)
* kernel: i40e: fix MMIO write access to an invalid page in i40e_clear_hw (CVE-2025-38200)
* kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate (CVE-2025-38477)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in the Linux kernel ALSA USB audio driver. This vulnerability allows a denial of service via a crafted USB audio device.
4.9 (Medium)
Affected products
Fixed
12 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-0:3.10.0-1160.140.1.rt56.1292.el7.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-debug-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-debug-debuginfo-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-debug-devel-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-debuginfo-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-devel-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-doc-0:3.10.0-1160.140.1.rt56.1292.el7.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-trace-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-trace-debuginfo-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-ELS:kernel-rt-trace-devel-0:3.10.0-1160.140.1.rt56.1292.el7.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Low
A flaw was found in the Linux kernel's md-raid10 driver. An issue in the disk removal routine (raid10_remove_disk) allows an out-of-bounds memory read due to improper validation of the disk index. A local user with privileges to manage storage configurations can exploit this vulnerability during RAID array maintenance operations. This flaw can lead to a system crash, resulting in a Denial of Service (DoS), or the potential unauthorized disclosure of kernel memory.
7.0 (High)
Affected products
Fixed
12 products, the same list as for
CVE-2022-48701
Threats
Impact
Moderate
A flaw was found in the Linux kernel's ALSA (Advanced Linux Sound Architecture) Behringer BCD2000 driver. A local user could exploit this vulnerability to achieve privilege escalation or cause a Denial of Service (DoS) by crashing the system. This issue occurs when device initialization fails during the probing process, improperly freeing active USB communication resources before terminating them, which leads to a use-after-free condition.
7.0 (High)
Affected products
Fixed
12 products, the same list as for
CVE-2022-48701
Threats
Impact
Moderate
A flaw was found in the Linux kernel's smsc75xx USB Ethernet driver. The driver fails to validate the packet length field of incoming network frames against the actual buffer size. An attacker on the local network can exploit this vulnerability by transmitting crafted Ethernet frames, causing the system to read beyond the allocated buffer boundaries. This issue leads to information disclosure by leaking sensitive kernel memory contents.
7.5 (High)
Affected products
Fixed
12 products, the same list as for
CVE-2022-48701
Threats
Impact
Moderate
A flaw was found in the Linux kernel's i40e network driver. When an attached device supplies malformed responses during driver operations, an integer underflow can occur. This issue leads to an invalid write operation in Memory-Mapped I/O (MMIO) space, which can cause a kernel crash and result in a Denial of Service (DoS).
7.0 (High)
Affected products
Fixed
12 products, the same list as for
CVE-2022-48701
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Quick Fair Queueing (QFQ) network packet scheduler. A local user with network administration privileges could exploit this vulnerability to cause a Denial of Service (DoS) by crashing the system. The issue is caused by a race condition when network scheduling classes are modified concurrently with status reporting operations, leading to improper memory access.
4.7 (Medium)
Affected products
Fixed
12 products, the same list as for
CVE-2022-48701
Threats
Impact
Moderate
References
39 references
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"title": "kernel: i40e: fix MMIO write access to an invalid page in i40e_clear_hw"
},
{
"cve": "CVE-2025-38477",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2025-07-28T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2383922"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Quick Fair Queueing (QFQ) network packet scheduler. A local user with network administration privileges could exploit this vulnerability to cause a Denial of Service (DoS) by crashing the system. The issue is caused by a race condition when network scheduling classes are modified concurrently with status reporting operations, leading to improper memory access.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This patch fixes a race condition in the QFQ packet scheduler, where concurrent modification and access to cl-\u003eagg may result in a use-after-free or NULL pointer dereference.\nThe bug occurs when qfq_change_class() reassigns the agg pointer while other threads read it in qfq_dump_class() or qfq_delete_class().\nThe fix synchronizes access using sch_tree_lock() and reorders destruction logic to avoid concurrency issues.\nThis issue can be triggered locally by users with CAP_NET_ADMIN privileges and may lead to kernel crashes or denial-of-service.\nAlthough the vulnerability involves a use-after-free, it only results in stale reads of deallocated memory, used in netlink reporting functions.\nThere is no write primitive, function pointer corruption, or kernel state modification, making privilege escalation infeasible in this case.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-38477"
},
{
"category": "external",
"summary": "RHBZ#2383922",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2383922"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-38477",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-38477"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38477",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38477"
},
{
"category": "external",
"summary": "https://kernelcve.org/list/?q=CVE-2025-38477",
"url": "https://kernelcve.org/list/?q=CVE-2025-38477"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025072813-CVE-2025-38477-8b42@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025072813-CVE-2025-38477-8b42@gregkh/T"
}
],
"release_date": "2025-07-28T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-09-30T17:24:19+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"restart_required": {
"category": "none"
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"url": "https://access.redhat.com/errata/RHSA-2025:17109"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent module sch_qfq from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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"title": "kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate"
}
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}
Loading…
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.