RHSA-2017:3322
Vulnerability from csaf_redhat - Published: 2017-11-30 15:18 - Updated: 2026-11-07 05:14Summary
Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update
Severity
Moderate
Notes
Topic: An update for kernel-rt is now available for Red Hat Enterprise Linux 7.
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):
* It was found that the timer functionality in the Linux kernel ALSA subsystem is prone to a race condition between read and ioctl system call handlers, resulting in an uninitialized memory disclosure to user space. A local user could use this flaw to read information belonging to other users. (CVE-2017-1000380, Moderate)
Red Hat would like to thank Alexander Potapenko (Google) for reporting this issue.
Bug Fix(es):
* The kernel-rt packages have been upgraded to the 3.10.0-693.11.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1500035)
* Previously, the hfi1 driver called the preempt_disable() function to prevent migration on standard Red Hat Enterprise Linux and on Red Hat Enterprise Linux for Real Time. On Red Hat Enterprise Linux for Real Time with the realtime kernel (kernel-rt), calling preempt_disable() triggered a kernel panic. With this update, the kernel-rt code has been modified to use a realtime-specific function call to the preempt_disable_nort() function, which expands to the correct calls based on the kernel that is running. As a result, the hfi1 driver now works correctly on both Red Hat Enterprise Linux kernel and Red Hat Enterprise Linux for Real Time kernel-rt. (BZ#1507053)
* Previously, the hfi1 driver called the preempt_disable() function to prevent migration on standard Red Hat Enterprise Linux and on Red Hat Enterprise Linux for Real Time. On Red Hat Enterprise Linux for Real Time with the realtime kernel (kernel-rt), calling preempt_disable() triggered a kernel panic. With this update, the kernel-rt code has been modified to use a realtime-specific function call to the preempt_disable_nort() function, which expands to the correct calls based on the kernel that is running. As a result, the hfi1 driver now works correctly on both Red Hat Enterprise Linux kernel and Red Hat Enterprise Linux for Real Time kernel-rt. (BZ#1507054)
* In the realtime kernel, if the rt_mutex locking mechanism was taken in the interrupt context, the normal priority inheritance protocol incorrectly identified a deadlock, and a kernel panic occurred. This update reverts the patch that added rt_mutex in the interrupt context, and the kernel no longer panics due to this behavior. (BZ#1511382)
Enhancement(s):
* The current realtime throttling mechanism prevents the starvation of non-realtime tasks by CPU-intensive realtime tasks. When a realtime run queue is throttled, it allows non-realtime tasks to run. If there are not non-realtime tasks, the CPU goes idle. To safely maximize CPU usage by decreasing the CPU idle time, the RT_RUNTIME_GREED scheduler feature has been implemented. When enabled, this feature checks if non-realtime tasks are starving before throttling the realtime task. The RT_RUNTIME_GREED scheduler option guarantees some run time on all CPUs for the non-realtime tasks, while keeping the realtime tasks running as much as possible. (BZ#1505158)
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.
It was found that the timer functionality in the Linux kernel ALSA subsystem is prone to a race condition between read and ioctl system call handlers, resulting in an uninitialized memory disclosure to user space. A local user could use this flaw to read information belonging to other users.
4.7 (Medium)
Affected products
Fixed
30 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-0:3.10.0-693.11.1.rt56.632.el7.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-debug-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-debug-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-debug-devel-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-debug-kvm-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-debug-kvm-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-debuginfo-common-x86_64-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-devel-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-doc-0:3.10.0-693.11.1.rt56.632.el7.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-kvm-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-kvm-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-trace-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-trace-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-trace-devel-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-trace-kvm-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-NFV-7.4.Z:kernel-rt-trace-kvm-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-0:3.10.0-693.11.1.rt56.632.el7.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-debug-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-debug-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-debug-devel-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-debuginfo-common-x86_64-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-devel-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-doc-0:3.10.0-693.11.1.rt56.632.el7.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-trace-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-trace-debuginfo-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RT-7.4.Z:kernel-rt-trace-devel-0:3.10.0-693.11.1.rt56.632.el7.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
References
12 references
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"name": "Exposure of Sensitive Information to an Unauthorized Actor"
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"ids": [
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"text": "1463311"
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"category": "description",
"text": "It was found that the timer functionality in the Linux kernel ALSA subsystem is prone to a race condition between read and ioctl system call handlers, resulting in an uninitialized memory disclosure to user space. A local user could use this flaw to read information belonging to other users.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: information leak due to a data race in ALSA timer",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates of this product due to its life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.\n\nThis issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 may address 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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{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-1000380"
},
{
"category": "external",
"summary": "RHBZ#1463311",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1463311"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-1000380",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-1000380"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-1000380",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-1000380"
}
],
"release_date": "2017-06-12T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2017-11-30T15:18:55+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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"details": "Moderate"
}
],
"title": "kernel: information leak due to a data race in ALSA timer"
}
]
}
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.