RHSA-2025:10179
Vulnerability from csaf_redhat - Published: 2025-07-02 04:39 - Updated: 2026-10-30 01:14Summary
Red Hat Security Advisory: kernel security update
Severity
Moderate
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.2 Advanced Update 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 packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: um: Fix out-of-bounds read in LDT setup (CVE-2022-49395)
* 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)
* kernel: dm ioctl: prevent potential spectre v1 gadget (CVE-2022-49122)
* kernel: mt76: fix use-after-free by removing a non-RCU wcid pointer (CVE-2022-49328)
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
25 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:bpftool-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:bpftool-debuginfo-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-0:4.18.0-193.156.1.el8_2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-abi-whitelists-0:4.18.0-193.156.1.el8_2.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-core-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debug-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debug-core-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debug-debuginfo-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debug-devel-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debug-modules-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debug-modules-extra-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debuginfo-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-debuginfo-common-x86_64-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-devel-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-doc-0:4.18.0-193.156.1.el8_2.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-modules-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-modules-extra-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-tools-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-tools-debuginfo-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:kernel-tools-libs-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:perf-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:perf-debuginfo-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:python3-perf-0:4.18.0-193.156.1.el8_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.2.0.Z.AUS:python3-perf-debuginfo-0:4.18.0-193.156.1.el8_2.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
25 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
A vulnerability was found in the Linux kernel's `dm-ioctl` interface in the `lookup_ioctl()` function, which accepts a user-provided `cmd` value that is used to index the `_ioctls` array directly. This issue could lead to an out-of-bounds access if the CPU speculatively executes the array access before `cmd` is confirmed as valid, allowing an attacker to exploit a Spectre v1 gadget attack.
7.3 (High)
Affected products
Fixed
25 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
A vulnerability was found in the Linux kernel's mt76 wi-fi driver. A concurrency bug causes the `mtxq` TX queue to maintain a raw pointer to a `wcid` structure (`mtxq->wcid`) that might be freed by the time it is accessed. This issue can lead to a use-after-free scenario, leading to system instability, memory corruption, and potentially arbitrary code execution.
7.0 (High)
Affected products
Fixed
25 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
A vulnerability was found in the Linux kernel's user mode (um) subsystem, specifically within the Local Descriptor Table (LDT) setup functionality. The issue arises from the syscall_stub_data() function misinterpreting the data_count parameter as a byte count rather than a count of longs, leading to an out-of-bounds read. This flaw could expose sensitive kernel memory and cause system instability.
6.0 (Medium)
Affected products
Fixed
25 products, the same list as for
CVE-2022-49111
Threats
Impact
Moderate
References
33 references
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"category": "description",
"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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"category": "other",
"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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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: mt76: fix use-after-free by removing a non-RCU wcid pointer"
},
{
"cve": "CVE-2022-49395",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2025-02-26T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2347899"
}
],
"notes": [
{
"category": "description",
"text": "A vulnerability was found in the Linux kernel\u0027s user mode (um) subsystem, specifically within the Local Descriptor Table (LDT) setup functionality. The issue arises from the syscall_stub_data() function misinterpreting the data_count parameter as a byte count rather than a count of longs, leading to an out-of-bounds read. This flaw could expose sensitive kernel memory and cause system instability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: um: Fix out-of-bounds read in LDT setup",
"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.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2022-49395"
},
{
"category": "external",
"summary": "RHBZ#2347899",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347899"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2022-49395",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-49395"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-49395",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49395"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025022650-CVE-2022-49395-7419@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025022650-CVE-2022-49395-7419@gregkh/T"
}
],
"release_date": "2025-02-26T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-07-02T04:39:40+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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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
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"scope": "UNCHANGED",
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}
],
"title": "kernel: um: Fix out-of-bounds read in LDT setup"
}
]
}
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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
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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.