RHSA-2026:40764
Vulnerability from csaf_redhat - Published: 2026-07-21 15:14 - Updated: 2026-07-23 00:56Summary
Red Hat Security Advisory: OpenShift Container Platform 4.22.6 bug fix and security update
Severity
Important
Notes
Topic: Red Hat OpenShift Container Platform release 4.22.6 is now available with updates to packages and images that fix several bugs and add enhancements.
This release includes a security update for Red Hat OpenShift Container Platform 4.22.
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: Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.
This advisory contains the container images for Red Hat OpenShift Container Platform 4.22.6. See the following advisory for the RPM packages for this release:
https://access.redhat.com/errata/RHBA-2026:40763
Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes:
https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/
Security Fix(es):
* kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263)
* kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CVE-2026-43112)
* kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)
* kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242)
* kernel: KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry (CVE-2026-46316)
* kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359)
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.
All OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.
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 on ARM processors. A race condition in Translation Lookaside Buffer Invalidation (TLBI) operations during memory permission changes allows a local attacker to write to memory resources owned by higher privilege levels. This could allow an unprivileged local attacker to gain kernel privileges or a guest VM to escape to the hypervisor, resulting in complete system compromise.
8.4 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in the Linux kernel's CIFS (Common Internet File System) client. When the `cifs_sanitize_prepath` function processes specially crafted input, such as an empty string or a string containing only delimiters, it can attempt to read data beyond its allocated memory buffer. This out-of-bounds read can lead to a system crash, resulting in a denial of service.
8.1 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in the Netfilter flowtable component of the Linux kernel. This vulnerability occurs because the system does not strictly check the maximum number of hardware offload actions for IPv6, allowing it to process more actions than supported. This could potentially lead to system instability or a denial of service (DoS) condition, where the affected system becomes unresponsive.
7.8 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in the Linux kernel's `eventpoll` mechanism. A Use-After-Free (UAF) vulnerability, where the system attempts to access memory after it has been freed, can occur during the removal of a file. A local attacker could exploit this race condition to corrupt memory, potentially leading to privilege escalation or arbitrary code execution. This allows an attacker to gain elevated control over the system.
7.0 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for ARM64, specifically within the vgic-its component. This vulnerability occurs when multiple concurrent operations incorrectly drop the translation cache's reference to an entry more than once during cache invalidation. This leads to a use-after-free condition, which can result in memory corruption. The primary impact is potential system instability or a denial of service.
7.0 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) x86 shadow paging mechanism. This vulnerability occurs when a host page directory entry (PDE) mapping is changed from within the guest, leading to an unexpected role mismatch in shadow paging. This mismatch can cause a use-after-free condition, where the system attempts to access memory that has already been released. Such a condition can lead to system instability, denial of service, potentially the execution of arbitrary code or guest-to-host escape.
7.8 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
42 references
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"text": "A flaw was found in the Linux kernel on ARM processors. A race condition in Translation Lookaside Buffer Invalidation (TLBI) operations during memory permission changes allows a local attacker to write to memory resources owned by higher privilege levels. This could allow an unprivileged local attacker to gain kernel privileges or a guest VM to escape to the hypervisor, resulting in complete system compromise.",
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"details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n (For x86_64 architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For s390x architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For ppc64le architecture)\n The image digest is sha256:9c842e45cc643645313d721ba669dba4c66a97db63482dfee14e224de5e140d2\n\n (For aarch64 architecture)\n The image digest is sha256:60f35f63c8d87642bae7d49ff9b8953d429aa6bba7e510dcde317ddf48f30edd\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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"attackVector": "LOCAL",
"availabilityImpact": "NONE",
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"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
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"title": "kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources"
},
{
"cve": "CVE-2026-43112",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2026-05-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2467015"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s CIFS (Common Internet File System) client. When the `cifs_sanitize_prepath` function processes specially crafted input, such as an empty string or a string containing only delimiters, it can attempt to read data beyond its allocated memory buffer. This out-of-bounds read can lead to a system crash, resulting in a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "An Important out-of-bounds read flaw in the Linux kernel\u0027s CIFS client can lead to a system crash and denial of service. This vulnerability, present in Red Hat Enterprise Linux 8, 9, and 10, and Red Hat In-Vehicle OS 2, can be triggered by processing specially crafted input to the `cifs_sanitize_prepath` function, potentially disrupting system availability.",
"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"
}
],
"product_status": {
"fixed": [
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},
{
"category": "external",
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},
{
"category": "external",
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}
],
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"category": "vendor_fix",
"date": "2026-07-21T15:14:26+00:00",
"details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n (For x86_64 architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For s390x architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For ppc64le architecture)\n The image digest is sha256:9c842e45cc643645313d721ba669dba4c66a97db63482dfee14e224de5e140d2\n\n (For aarch64 architecture)\n The image digest is sha256:60f35f63c8d87642bae7d49ff9b8953d429aa6bba7e510dcde317ddf48f30edd\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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"scope": "UNCHANGED",
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"category": "impact",
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],
"title": "kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath"
},
{
"cve": "CVE-2026-43329",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-05-08T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2468124"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Netfilter flowtable component of the Linux kernel. This vulnerability occurs because the system does not strictly check the maximum number of hardware offload actions for IPv6, allowing it to process more actions than supported. This could potentially lead to system instability or a denial of service (DoS) condition, where the affected system becomes unresponsive.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: netfilter: flowtable: strictly check for maximum number of actions",
"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": {
"fixed": [
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"references": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-43329"
},
{
"category": "external",
"summary": "RHBZ#2468124",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468124"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43329",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43329"
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43329"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43329.mbox",
"url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43329.mbox"
}
],
"release_date": "2026-05-08T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-21T15:14:26+00:00",
"details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n (For x86_64 architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For s390x architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For ppc64le architecture)\n The image digest is sha256:9c842e45cc643645313d721ba669dba4c66a97db63482dfee14e224de5e140d2\n\n (For aarch64 architecture)\n The image digest is sha256:60f35f63c8d87642bae7d49ff9b8953d429aa6bba7e510dcde317ddf48f30edd\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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"attackVector": "LOCAL",
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"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"threats": [
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"details": "Important"
}
],
"title": "kernel: netfilter: flowtable: strictly check for maximum number of actions"
},
{
"cve": "CVE-2026-46242",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-05-30T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2483519"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s `eventpoll` mechanism. A Use-After-Free (UAF) vulnerability, where the system attempts to access memory after it has been freed, can occur during the removal of a file. A local attacker could exploit this race condition to corrupt memory, potentially leading to privilege escalation or arbitrary code execution. This allows an attacker to gain elevated control over the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A race in eventpoll ep_remove() can let a concurrent file release observe a transient cleared file f_ep state and skip the normal eventpoll_release_file cleanup path. In the epoll watches epoll case this can free the watched struct eventpoll while ep_remove() still uses list pointers that refer into that freed object, so hlist_del_rcu() can write into freed kmalloc memory. This is a use-after-free memory corruption issue rather than a pure crash or resource leak. For the CVSS the AC:H is selected because reliable triggering depends on a race window between ep_remove() and __fput(). The issue is not network reachable. Impact is at least a local denial of service via kernel crash and in worst case may allow confidentiality, integrity, and availability compromise due to kernel heap memory corruption. Keeping Moderate with CVSS 7.0, but could be increased to the Important if reproducer becomes available that shows LPE possibility.\n\nRHEL 9.0 and 9.2 are not affected.",
"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"
}
],
"product_status": {
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"category": "self",
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"category": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483519"
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-46242"
},
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"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46242",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46242"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026053014-CVE-2026-46242-8394@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026053014-CVE-2026-46242-8394@gregkh/T"
}
],
"release_date": "2026-05-30T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-21T15:14:26+00:00",
"details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n (For x86_64 architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For s390x architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For ppc64le architecture)\n The image digest is sha256:9c842e45cc643645313d721ba669dba4c66a97db63482dfee14e224de5e140d2\n\n (For aarch64 architecture)\n The image digest is sha256:60f35f63c8d87642bae7d49ff9b8953d429aa6bba7e510dcde317ddf48f30edd\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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"restart_required": {
"category": "none"
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},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF"
},
{
"cve": "CVE-2026-46316",
"cwe": {
"id": "CWE-911",
"name": "Improper Update of Reference Count"
},
"discovery_date": "2026-06-09T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2486982"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Kernel-based Virtual Machine (KVM) for ARM64, specifically within the vgic-its component. This vulnerability occurs when multiple concurrent operations incorrectly drop the translation cache\u0027s reference to an entry more than once during cache invalidation. This leads to a use-after-free condition, which can result in memory corruption. The primary impact is potential system instability or a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry",
"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": {
"fixed": [
"9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46316"
},
{
"category": "external",
"summary": "RHBZ#2486982",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486982"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46316",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46316"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46316",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46316"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026060936-CVE-2026-46316-f761@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026060936-CVE-2026-46316-f761@gregkh/T"
},
{
"category": "external",
"summary": "https://www.openwall.com/lists/oss-security/2026/06/10/16",
"url": "https://www.openwall.com/lists/oss-security/2026/06/10/16"
}
],
"release_date": "2026-06-09T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-21T15:14:26+00:00",
"details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n (For x86_64 architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For s390x architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For ppc64le architecture)\n The image digest is sha256:9c842e45cc643645313d721ba669dba4c66a97db63482dfee14e224de5e140d2\n\n (For aarch64 architecture)\n The image digest is sha256:60f35f63c8d87642bae7d49ff9b8953d429aa6bba7e510dcde317ddf48f30edd\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
"product_ids": [
"9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:40764"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry"
},
{
"cve": "CVE-2026-53359",
"cwe": {
"id": "CWE-825",
"name": "Expired Pointer Dereference"
},
"discovery_date": "2026-07-04T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2497033"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Kernel-based Virtual Machine (KVM) x86 shadow paging mechanism. This vulnerability occurs when a host page directory entry (PDE) mapping is changed from within the guest, leading to an unexpected role mismatch in shadow paging. This mismatch can cause a use-after-free condition, where the system attempts to access memory that has already been released. Such a condition can lead to system instability, denial of service, potentially the execution of arbitrary code or guest-to-host escape.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important flaw in the KVM x86 shadow paging mechanism where an attacker with privileged access inside the guest VM could trigger a use-after-free condition by manipulating page directory entries on the host. This could lead to system instability, denial of service, or potentially arbitrary code execution on the host.\n\nIn Red Hat Enterprise Linux 7, nested virtualization for KVM is a Technology Preview feature and the nested parameter defaults to 0 (disabled) for both kvm_intel and kvm_amd.",
"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"
}
],
"product_status": {
"fixed": [
"9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-53359"
},
{
"category": "external",
"summary": "RHBZ#2497033",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497033"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-53359",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-53359"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-53359",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53359"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026070403-CVE-2026-53359-4f57@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026070403-CVE-2026-53359-4f57@gregkh/T"
},
{
"category": "external",
"summary": "https://www.openwall.com/lists/oss-security/2026/07/06/7",
"url": "https://www.openwall.com/lists/oss-security/2026/07/06/7"
}
],
"release_date": "2026-07-04T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-21T15:14:26+00:00",
"details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n (For x86_64 architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For s390x architecture)\n The image digest is sha256:4b439fabd9a53e37a7fa436e349837283d04513bc8209e643171d1b86d31b845\n\n (For ppc64le architecture)\n The image digest is sha256:9c842e45cc643645313d721ba669dba4c66a97db63482dfee14e224de5e140d2\n\n (For aarch64 architecture)\n The image digest is sha256:60f35f63c8d87642bae7d49ff9b8953d429aa6bba7e510dcde317ddf48f30edd\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
"product_ids": [
"9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:40764"
},
{
"category": "workaround",
"details": "This vulnerability can be mitigated by disabling nested virtualization. Create a file in `/etc/modprobe.d/` with a descriptive name, such as `cve-2026-53359-mitigation.conf`. In that file, disable nested virtualization for the `kvm_intel` and `kvm_amd` kernel modules:\n```\noptions kvm-intel nested=0\noptions kvm-amd nested=0\n```\n\nUse `lsmod` to determine if either module is already loaded. If so, remove loaded modules with `modprobe -r`. To validate that nested virtualization is disabled, read the files `/sys/module/kvm_intel/parameters/nested` and `/sys/module/kvm_amd/parameters/nested`. If these modules are loaded, those files should read `N` to indicate that the feature is disabled.\n\nIn OpenShift 4, a MachineConfig can be utilized to create a modprobe configuration allowing control of the module on applicable nodes. See the following article for an example.\n\nhttps://access.redhat.com/solutions/6979679",
"product_ids": [
"9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202607152026-0",
"9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202607152026-0"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role"
}
]
}
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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.
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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.
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