RHSA-2025:17123
Vulnerability from csaf_redhat - Published: 2025-10-01 00:24 - Updated: 2026-11-09 22:46Summary
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 9.2 Update Services for SAP Solutions.
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: usb: dwc3: gadget: check that event count does not exceed event buffer length (CVE-2025-37810)
* kernel: i40e: fix MMIO write access to an invalid page in i40e_clear_hw (CVE-2025-38200)
* kernel: vsock: Fix transport_* TOCTOU (CVE-2025-38461)
* kernel: drm/gem: Acquire references on GEM handles for framebuffers (CVE-2025-38449)
* kernel: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry (CVE-2025-38472)
* kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527)
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's DesignWare USB3 (DWC3) gadget driver. On systems configured to operate as USB peripheral devices, the driver does not verify that the hardware event count stays within the allocated event buffer size before copying event data. An attacker interacting with the affected interface can trigger an out-of-bounds memory read or write, causing a kernel crash and resulting in a Denial of Service (DoS).
7.1 (High)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.140.1.rt14.425.el9_2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-debuginfo-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-devel-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-kvm-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-modules-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-modules-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debug-modules-extra-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debuginfo-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-devel-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-kvm-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-modules-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-modules-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.2.0.Z.E4S:kernel-rt-modules-extra-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.140.1.rt14.425.el9_2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debug-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debug-debuginfo-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debug-devel-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debug-modules-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debug-modules-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debug-modules-extra-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debuginfo-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-debuginfo-common-x86_64-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-devel-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-modules-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-modules-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.2.0.Z.E4S:kernel-rt-modules-extra-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64 | — |
Vendor Fix
fix
|
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
34 products, the same list as for
CVE-2025-37810
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Direct Rendering Manager (DRM) subsystem. A local user with access to the graphics device can cause a denial of service (DoS) by triggering a use-after-free condition. By releasing a Graphics Execution Manager (GEM) buffer handle while it remains attached to an active framebuffer, subsequent display mode-setting operations attempt to access freed memory, causing a kernel crash.
7.3 (High)
Affected products
Fixed
34 products, the same list as for
CVE-2025-37810
Threats
Impact
Moderate
A flaw was found in the Linux kernel's vsock (virtual socket) subsystem. A race condition exists between transport assignment during socket initialization and module unloading, which can leave behind an invalid pointer. A local user can exploit this vulnerability by performing socket operations while a transport module is unloaded, triggering a system crash that results in a Denial of Service (DoS).
7.3 (High)
Affected products
Fixed
34 products, the same list as for
CVE-2025-37810
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Netfilter connection tracking subsystem (nf_conntrack). A race condition between connection tracking entry expiration and reinitialization can cause the kernel to attempt to remove an uninitialized entry from internal tracking tables. An unprivileged local user can exploit this flaw by generating network traffic within user-controlled namespaces, leading to a system crash and a denial of service (DoS).
7.1 (High)
Affected products
Fixed
34 products, the same list as for
CVE-2025-37810
Threats
Impact
Moderate
A flaw was found in the Linux kernel's SMB (Server Message Block) client. A timing race condition during the unmounting of a network file share can cause memory resources to be prematurely freed while an opportunistic lock break operation is still executing. A local user could exploit this use-after-free vulnerability to crash the system, resulting in a denial of service (DoS), or potentially escalate privileges.
7.0 (High)
Affected products
Fixed
34 products, the same list as for
CVE-2025-37810
Threats
Impact
Moderate
References
39 references
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{
"category": "external",
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{
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"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38449",
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{
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"text": "A flaw was found in the Linux kernel\u0027s vsock (virtual socket) subsystem. A race condition exists between transport assignment during socket initialization and module unloading, which can leave behind an invalid pointer. A local user can exploit this vulnerability by performing socket operations while a transport module is unloaded, triggering a system crash that results in a Denial of Service (DoS).",
"title": "Vulnerability description"
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{
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"text": "kernel: vsock: Fix transport_* TOCTOU",
"title": "Vulnerability summary"
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"text": "This patch addresses a race condition in the vsock core that could lead to a use-after-free or NULL pointer dereference when assigning transports during socket initialization.\nThe vulnerability stems from a lack of synchronization between transport selection and potential module unloading, leading to stale pointers being dereferenced.\nA mutex now protects access to the transport selection logic, and reference counting ensures the module is retained during use.\nThe issue has low impact on confidentiality, but may cause a system crash, resulting in high availability impact.\nSince the problem is reachable by unprivileged users via socket operations, Privileges Required = Low (for the CVSS).\nWhile the issue is most clearly triggered during manual module unload, similar conditions can also arise from automatic module unloading, hotplug scripts, or asynchronous transport (de)registration in multi-threaded environments.",
"title": "Statement"
},
{
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"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.",
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{
"cve": "CVE-2025-38472",
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"id": "CWE-362",
"name": "Concurrent Execution using Shared Resource with Improper Synchronization"
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"ids": [
{
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"text": "2383916"
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"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Netfilter connection tracking subsystem (nf_conntrack). A race condition between connection tracking entry expiration and reinitialization can cause the kernel to attempt to remove an uninitialized entry from internal tracking tables. An unprivileged local user can exploit this flaw by generating network traffic within user-controlled namespaces, leading to a system crash and a denial of service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Actual only starting from the Red Hat Enterprise Linux 9.\n\nThe vulnerability in nf_conntrack can be triggered by an unprivileged user under typical configurations where user and network namespaces are available (e.g., via unshare or CLONE_NEWNET). This enables the user to initiate Netfilter-based networking operations (such as NAT or connection tracking) even if the system had no prior active conntrack entries.\n\nSince exploitation does not require elevated privileges beyond what is granted in the default namespace setup with CAP_NET_RAW or similar, the Privileges Required (PR) is assessed as Low. The primary attack vector is remote-triggered packets from user-controlled namespaces that cause conntrack allocation and destruction races, leading to a potential kernel panic (Availability: High).",
"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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{
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"text": "A flaw was found in the Linux kernel\u0027s SMB (Server Message Block) client. A timing race condition during the unmounting of a network file share can cause memory resources to be prematurely freed while an opportunistic lock break operation is still executing. A local user could exploit this use-after-free vulnerability to crash the system, resulting in a denial of service (DoS), or potentially escalate privileges.",
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{
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"text": "kernel: smb: client: fix use-after-free in cifs_oplock_break",
"title": "Vulnerability summary"
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{
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"text": "This vulnerability is rated as having Moderate impact for Red Hat Enterprise Linux because exploitation requires local access, specific timing during the unmount of an active SMB/CIFS filesystem, and winning a race condition, primarily resulting in a kernel crash or privilege escalation. Under default configurations, the CIFS client kernel module is not loaded unless an administrator or system service explicitly mounts a remote SMB share. Systems that do not mount network filesystems via the CIFS protocol are not exposed to this issue.",
"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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{
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{
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"RT-9.2.0.Z.E4S:kernel-rt-modules-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64",
"RT-9.2.0.Z.E4S:kernel-rt-modules-core-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64",
"RT-9.2.0.Z.E4S:kernel-rt-modules-extra-0:5.14.0-284.140.1.rt14.425.el9_2.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: smb: client: fix use-after-free in cifs_oplock_break"
}
]
}
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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.