RHSA-2026:71016
Vulnerability from csaf_redhat - Published: 2026-09-23 19:09 - Updated: 2026-11-09 05:55Summary
Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for kernel-rt is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. 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: drm/amdgpu: Fix use-after-free race in VM acquire (CVE-2026-43370)
* kernel: mac802154: llsec: add skb_cow_data() before in-place crypto (CVE-2026-63831)
* kernel: sctp: don't free the ASCONF's own transport in DEL-IP processing (CVE-2026-64564)
* kernel: ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control (CVE-2026-72261)
* kernel: xfrm: ah6: validate routing header segments_left (CVE-2026-80844)
* kernel: net: tun: bound receive headroom (CVE-2026-81000)
* kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read (CVE-2026-89846)
Bug Fix(es) and Enhancement(s):
* sctp: prevent peer transport count overflow [rhel-8.10.z] (JIRA:RHEL-216297)
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 AMD GPU (amdgpu) driver. This vulnerability involves a timing issue, known as a race condition, during the process of acquiring a Virtual Machine (VM). When multiple processes attempt to access the same VM simultaneously, a local attacker could exploit this flaw. Successful exploitation could lead to an escalation of privileges, allowing unauthorized access or control, or cause the system to become unstable and crash (denial of service).
7.0 (High)
Affected products
Fixed
30 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.167.1.rt7.508.el8_10.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-debuginfo-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-devel-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-kvm-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-extra-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-common-x86_64-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-devel-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-kvm-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-modules-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.10.0.Z.MAIN.EUS:kernel-rt-modules-extra-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.167.1.rt7.508.el8_10.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-core-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-core-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-debuginfo-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-devel-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debug-modules-extra-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-debuginfo-common-x86_64-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-devel-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-modules-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.10.0.Z.MAIN.EUS:kernel-rt-modules-extra-0:4.18.0-553.167.1.rt7.508.el8_10.x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in the Linux kernel's mac802154 (IEEE 802.15.4 MAC security) component. This vulnerability allows for data corruption and potential kernel crashes when cryptographic transformations are performed on shared network packet data without proper isolation. A remote attacker could exploit this by sending specific 802.15.4 traffic, leading to system instability or denial of service.
7.0 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2026-43370
Threats
Impact
Important
A flaw was found in the Stream Control Transmission Protocol (SCTP) implementation within the Linux kernel. A remote attacker could send a specially crafted sequence of ASCONF (Add IP Address Configuration) chunks, including DEL-IP (Delete IP Address) parameters, to trigger a use-after-free condition. This memory corruption could lead to a system crash, resulting in a denial of service, and potentially allow for arbitrary code execution.
7.8 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2026-43370
Threats
Impact
Important
A flaw was found in the Linux kernel's Sound Open Firmware (SOF) subsystem, specifically within the `ipc3-control` component. This vulnerability occurs in the `snd_sof_update_control()` function where the size of firmware-provided data is not properly validated against the allocated buffer size. An attacker could exploit this by providing a malformed size, leading to a buffer overflow. This could result in memory corruption, potentially causing system instability or a denial of service.
7.0 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2026-43370
Threats
Impact
Moderate
A flaw was found in the Linux kernel's xfrm subsystem, specifically within the AH6 (Authentication Header for IPv6) module. The `ipv6_rearrange_rthdr()` function does not properly validate the `segments_left` field in routing headers when processing raw IPv6 HDRINCL packets. This oversight allows an attacker to craft a malicious packet that can cause an out-of-bounds memory access, potentially leading to memory corruption.
8.3 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2026-43370
Threats
Impact
Important
A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tun_get_user() function when processing oversized headroom requests. This can occur if Open vSwitch (OVS) propagates an excessively large headroom request to the TUN or TAP device. Successful exploitation could lead to memory corruption, where network packet data is written outside its intended buffer, potentially causing a denial of service or other system instability.
7.8 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2026-43370
Threats
Impact
Important
A flaw was found in the Linux kernel's `scsi: qla2xxx` driver. A remote attacker, by sending a specially crafted Fibre Channel Protocol (FCP) response, could cause an integer underflow. This underflow leads to an out-of-bounds read when handling sense data, potentially disclosing sensitive memory information from the kernel's heap.
7.1 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2026-43370
Threats
Impact
Important
References
47 references
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"text": "A flaw was found in the Linux kernel\u0027s AMD GPU (amdgpu) driver. This vulnerability involves a timing issue, known as a race condition, during the process of acquiring a Virtual Machine (VM). When multiple processes attempt to access the same VM simultaneously, a local attacker could exploit this flaw. Successful exploitation could lead to an escalation of privileges, allowing unauthorized access or control, or cause the system to become unstable and crash (denial of service).",
"title": "Vulnerability description"
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{
"category": "summary",
"text": "kernel: drm/amdgpu: Fix use-after-free race in VM acquire",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as Moderate impact because successful exploitation requires local user privileges, specific AMD graphics hardware, and precise race condition timing between forked processes. In standard Red Hat Enterprise Linux deployments, the affected amdgpu kernel module is only loaded on systems utilizing supported AMD graphics adapters. Furthermore, the issue cannot be triggered remotely over the network, confining the potential risk to local denial of service or privilege escalation on systems running concurrent GPU workloads.",
"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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{
"category": "external",
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-64564",
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{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026080404-CVE-2026-64564-6762@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026080404-CVE-2026-64564-6762@gregkh/T"
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"title": "Vulnerability summary"
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{
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"text": "This vulnerability is rated Moderate rather than Important because successful exploitation requires local authenticated access and specifically depends on systems equipped with Sound Open Firmware (SOF) audio hardware. In typical Red Hat Enterprise Linux server and virtualized deployments, this audio DSP hardware is not present, leaving the corresponding driver inactive and unloaded by default. On systems where the hardware is present, exploitation is constrained by local permissions required to interact with sound controls, primarily posing a risk of denial of service or system crash.",
"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.",
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"url": "https://access.redhat.com/errata/RHSA-2026:71016"
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{
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"details": "If QLogic Fibre Channel HBAs are not in use, the \u0027qla2xxx\u0027 kernel module can be blacklisted to prevent it from loading. This can be achieved by creating a modprobe configuration file.\n\nTo blacklist the module:\n1. Create a file named `/etc/modprobe.d/blacklist-qla2xxx.conf` with the following content:\n `blacklist qla2xxx`\n2. Regenerate the initramfs to ensure the blacklist is applied during boot:\n `sudo dracut -f -v` (for RHEL 7/8/9)\n `sudo mkinitcpio -P` (for Arch-based systems, if applicable)\n3. Reboot the system for the changes to take effect.\n\nWarning: Blacklisting this module will disable functionality for QLogic Fibre Channel HBAs. Ensure that this hardware is not required before applying this mitigation. A system reboot is required for the changes to take effect.",
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"title": "kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read"
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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.