RHSA-2025:10193
Vulnerability from csaf_redhat - Published: 2025-07-02 06:48 - Updated: 2026-11-09 22:45Summary
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 9.0 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: use-after-free in nfsd4_ssc_setup_dul in fs/nfsd/nfs4proc.c (CVE-2023-1652)
* kernel: dlm: fix plock invalid read (CVE-2022-49407)
* kernel: blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx (CVE-2022-49377)
* kernel: Bluetooth: Fix use after free in hci_send_acl (CVE-2022-49111)
* kernel: scsi: libfc: Fix use after free in fc_exch_abts_resp() (CVE-2022-49114)
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 vulnerability was found in the Linux kernel's Bluetooth subsystem in the `hci_disconn_phylink_complete_evt()` function. Improper cleanup and reference handling can lead to a connection object, `hcon`, being freed and then later accessed during a subsequent function call. This issue can lead to a use-after-free scenario, leading to system instability, memory corruption, and potential code execution.
7.0 (High)
Affected products
Fixed
30 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-0:5.14.0-70.136.1.rt21.208.el9_0.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-core-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debug-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debug-debuginfo-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debug-devel-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debug-kvm-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debug-modules-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debug-modules-extra-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debuginfo-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-devel-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-kvm-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-modules-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: NFV-9.0.0.Z.E4S:kernel-rt-modules-extra-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-0:5.14.0-70.136.1.rt21.208.el9_0.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-core-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debug-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debug-core-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debug-debuginfo-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debug-devel-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debug-modules-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debug-modules-extra-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debuginfo-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-devel-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-modules-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: RT-9.0.0.Z.E4S:kernel-rt-modules-extra-0:5.14.0-70.136.1.rt21.208.el9_0.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
A vulnerability was found in the Linux kernel's SCSI libfc library in the `fc_exch_abts_resp()` function, which can lead to a use-after-free scenario. This issue can occur because the function calls `fc_exch_release()`, which decrements a reference count stored in the `ep` object and then frees the object once the count is zero. However, the `ep` object is referenced again and can result in the now-freed `ep` pointer being accessed, resulting in system instability, memory corruption, and potential arbitrary code execution.
7.0 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
A use-after-free vulnerability was found in the blk_mq_get_sq_hctx function in the Linux kernel's block multiqueue (blk-mq) subsystem. This issue occurs when the function accesses the tagset pointer to determine the current default hardware context through mapping. If this access occurs after the tagset has been freed, typically after the queue cleanup process, it can lead to memory corruption. Such corruption may result in system crashes, information leaks, or privilege escalation, depending on how the freed memory is subsequently used.
7.8 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Distributed Lock Manager (DLM) subsystem. A local user performing file locking operations on a clustered filesystem can trigger an out-of-bounds memory read when the kernel incorrectly accesses internal lock request structures. This vulnerability can lead to a Denial of Service (DoS) by causing a system crash or potentially allow the disclosure of sensitive kernel memory.
7.1 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
A use-after-free flaw was found in nfsd4_ssc_setup_dul in fs/nfsd/nfs4proc.c in the NFS filesystem in the Linux Kernel. This issue could allow a local attacker to crash the system or it may lead to a kernel information leak problem.
7.8 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
References
33 references
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"text": "A vulnerability was found in the Linux kernel\u0027s Bluetooth subsystem in the `hci_disconn_phylink_complete_evt()` function. Improper cleanup and reference handling can lead to a connection object, `hcon`, being freed and then later accessed during a subsequent function call. This issue can lead to a use-after-free scenario, leading to system instability, memory corruption, and potential code execution.",
"title": "Vulnerability description"
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"text": "kernel: Bluetooth: Fix use after free in hci_send_acl",
"title": "Vulnerability summary"
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"text": "This vulnerability is rated as Moderate impact for Red Hat Enterprise Linux because exploitation requires local access and interaction with an active Bluetooth interface, limiting the attack vector. Standard enterprise server deployments typically lack Bluetooth hardware and do not run Bluetooth services, minimizing exposure under default configurations. On systems where Bluetooth hardware is actively enabled and handled, a local attacker could trigger memory corruption, resulting in a denial of service or unexpected kernel state.",
"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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"text": "A use-after-free flaw was found in nfsd4_ssc_setup_dul in fs/nfsd/nfs4proc.c in the NFS filesystem in the Linux Kernel. This issue could allow a local attacker to crash the system or it may lead to a kernel information leak problem.",
"title": "Vulnerability description"
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"title": "Vulnerability summary"
},
{
"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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}
Loading…
Loading…
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.