{ "advisories": [ { "id": "USN-8593-1", "source": "usn", "title": "Linux kernel vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8593-1" }, { "id": "USN-8603-1", "source": "usn", "title": "Linux kernel (Azure) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8603-1" }, { "id": "USN-8618-1", "source": "usn", "title": "Linux kernel vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8618-1" }, { "id": "USN-8663-1", "source": "usn", "title": "Linux kernel (NVIDIA) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8663-1" }, { "id": "USN-8664-1", "source": "usn", "title": "Linux kernel (NVIDIA BaseOS) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8664-1" }, { "id": "USN-8728-1", "source": "usn", "title": "Linux kernel (GCP) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8728-1" }, { "id": "USN-8729-1", "source": "usn", "title": "Linux kernel vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8729-1" }, { "id": "USN-8761-1", "source": "usn", "title": "Linux kernel (Azure) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8761-1" }, { "id": "USN-8729-2", "source": "usn", "title": "Linux kernel (Raspberry Pi Real-time) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8729-2" }, { "id": "USN-8761-2", "source": "usn", "title": "Linux kernel (Azure FIPS) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8761-2" }, { "id": "USN-8781-1", "source": "usn", "title": "Linux kernel (NVIDIA Tegra) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8781-1" }, { "id": "USN-8729-3", "source": "usn", "title": "Linux kernel vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8729-3" }, { "id": "USN-8802-1", "source": "usn", "title": "Linux kernel (Oracle) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8802-1" }, { "id": "USN-8728-2", "source": "usn", "title": "Linux kernel (Azure) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8728-2" }, { "id": "USN-8729-4", "source": "usn", "title": "Linux kernel (Low Latency) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8729-4" }, { "id": "USN-8729-5", "source": "usn", "title": "Linux kernel (AWS FIPS) vulnerabilities", "url": "https://ubuntu.com/security/notices/USN-8729-5" } ], "cve": "CVE-2026-64183", "enrichment": { "affected": [ { "configurations": [ { "platform": null, "status": "affected", "versions": { "scheme": "code_commit", "value": "[5894cf571e14fb393a4d0a82538de032127b9d8b,29cd94e678fcb3c4fd0f359deeac6d61334323fc)" } }, { "platform": null, "status": "affected", "versions": { "scheme": "code_commit", "value": "[5894cf571e14fb393a4d0a82538de032127b9d8b,6996e954ae830f5b793ba6cf449885ca519dbdd2)" } }, { "platform": null, "status": "affected", "versions": { "scheme": "code_commit", "value": "[5894cf571e14fb393a4d0a82538de032127b9d8b,c32a1fbe0f9a48453a552bb315cc4f1e7a74084e)" } }, { "platform": null, "status": "affected", "versions": { "scheme": "code_commit", "value": "[5894cf571e14fb393a4d0a82538de032127b9d8b,e871549f7894ad4114b3dd53f241aa25a268ba8b)" } }, { "platform": null, "status": "affected", "versions": { "scheme": "code_commit", "value": "[5894cf571e14fb393a4d0a82538de032127b9d8b,13c6da02e767152c9ac4330962247a5e47011035)" } } ], "enrichment": { "confidence": 99.0, "confidence_source": "inferred", "scores": [ { "score": 99.0, "source": "inferred" }, { "score": 100.0, "source": "matching" } ] }, "original": { "product": "Linux", "source": "cna", "vendor": "Linux" }, "product": "linux_kernel", "vendor": "linux" }, { "configurations": [ { "platform": null, "status": "affected", "versions": { "scheme": "generic", "value": "6.6" } }, { "platform": null, "status": "unaffected", "versions": { "scheme": "generic", "value": "[0,6.6)" } }, { "platform": null, "status": "unaffected", "versions": { "scheme": "semver", "value": "[6.6.142,6.7.0)" } }, { "platform": null, "status": "unaffected", "versions": { "scheme": "semver", "value": "[6.12.92,6.13.0)" } }, { "platform": null, "status": "unaffected", "versions": { "scheme": "semver", "value": "[6.18.34,6.19.0)" } }, { "platform": null, "status": "unaffected", "versions": { "scheme": "semver", "value": "[7.0.11,7.1.0)" } }, { "platform": null, "status": "unaffected", "versions": { "scheme": "generic", "value": "[7.1,*]" } } ], "enrichment": { "confidence": 99.0, "confidence_source": "inferred", "scores": [ { "score": 99.0, "source": "inferred" }, { "score": 100.0, "source": "matching" } ] }, "original": { "product": "Linux", "source": "cna", "vendor": "Linux" }, "product": "linux_kernel", "vendor": "linux" } ], "created": "2026-07-21T19:45:03.098467+00:00", "updated": "2026-07-30T20:15:05.532573+00:00", "vendors": [ "linux", "linux$PRODUCT$linux_kernel" ] }, "epss": { "score": 0.00162 }, "mitre": { "cpes": [ "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*" ], "created": "2026-07-19T15:41:05.896000+00:00", "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi: Allocate runtime workqueue before ACPI init\n\nSince commit\n\n 5894cf571e14 (\"acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers\")\n\nACPI PRM calls are delegated to a workqueue which runs in a kernel\nthread, making it easier to detect and mitigate faulting memory accesses\nperformed by the firmware.\n\nRafael reports that such PRM accesses may occur before efisubsys_init()\nexecutes, which is where the workqueue is allocated, leading to NULL\npointer dereferences. Since acpi_init() [which triggers the early PRM\naccesses] executes as a subsys_initcall() as well, and has its own\ndependencies that may be sensitive to initcall ordering, deferring\nacpi_init() is not an option.\n\nSo instead, split off the workqueue allocation into its own postcore\ninitcall, as this is the only missing piece to allow EFI runtime calls\nto be made. This ensures that EFI runtime call (including PRM calls) are\naccessible to all code running at subsys_initcall() level.", "metrics": { "cvssV2_0": {}, "cvssV3_0": {}, "cvssV3_1": {}, "cvssV4_0": {} }, "mitre_repo_path": "cves/2026/64xxx/CVE-2026-64183.json", "references": [ "https://git.kernel.org/stable/c/13c6da02e767152c9ac4330962247a5e47011035", "https://git.kernel.org/stable/c/29cd94e678fcb3c4fd0f359deeac6d61334323fc", "https://git.kernel.org/stable/c/6996e954ae830f5b793ba6cf449885ca519dbdd2", "https://git.kernel.org/stable/c/c32a1fbe0f9a48453a552bb315cc4f1e7a74084e", "https://git.kernel.org/stable/c/e871549f7894ad4114b3dd53f241aa25a268ba8b" ], "title": "efi: Allocate runtime workqueue before ACPI init", "updated": "2026-07-19T15:41:05.896000+00:00", "vendors": [ "linux", "linux$PRODUCT$linux_kernel" ], "weaknesses": [] }, "nvd": { "cpes": [ "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*" ], "created": "2026-07-19T16:18:00.703000+00:00", "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi: Allocate runtime workqueue before ACPI init\n\nSince commit\n\n 5894cf571e14 (\"acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers\")\n\nACPI PRM calls are delegated to a workqueue which runs in a kernel\nthread, making it easier to detect and mitigate faulting memory accesses\nperformed by the firmware.\n\nRafael reports that such PRM accesses may occur before efisubsys_init()\nexecutes, which is where the workqueue is allocated, leading to NULL\npointer dereferences. Since acpi_init() [which triggers the early PRM\naccesses] executes as a subsys_initcall() as well, and has its own\ndependencies that may be sensitive to initcall ordering, deferring\nacpi_init() is not an option.\n\nSo instead, split off the workqueue allocation into its own postcore\ninitcall, as this is the only missing piece to allow EFI runtime calls\nto be made. This ensures that EFI runtime call (including PRM calls) are\naccessible to all code running at subsys_initcall() level.", "metrics": { "cvssV2_0": {}, "cvssV3_0": {}, "cvssV3_1": { "score": 5.5, "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H" }, "cvssV4_0": {} }, "nvd_repo_path": "2026/CVE-2026-64183.json", "references": [ "https://git.kernel.org/stable/c/13c6da02e767152c9ac4330962247a5e47011035", "https://git.kernel.org/stable/c/29cd94e678fcb3c4fd0f359deeac6d61334323fc", "https://git.kernel.org/stable/c/6996e954ae830f5b793ba6cf449885ca519dbdd2", "https://git.kernel.org/stable/c/c32a1fbe0f9a48453a552bb315cc4f1e7a74084e", "https://git.kernel.org/stable/c/e871549f7894ad4114b3dd53f241aa25a268ba8b" ], "title": null, "updated": "2026-08-11T20:05:55.917000+00:00", "vendors": [ "linux", "linux$PRODUCT$linux_kernel" ], "weaknesses": [ "CWE-476" ] }, "opencve": { "changes": [ { "created": "2026-07-19T16:15:00+00:00", "data": [ { "details": { "new": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi: Allocate runtime workqueue before ACPI init\n\nSince commit\n\n 5894cf571e14 (\"acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers\")\n\nACPI PRM calls are delegated to a workqueue which runs in a kernel\nthread, making it easier to detect and mitigate faulting memory accesses\nperformed by the firmware.\n\nRafael reports that such PRM accesses may occur before efisubsys_init()\nexecutes, which is where the workqueue is allocated, leading to NULL\npointer dereferences. Since acpi_init() [which triggers the early PRM\naccesses] executes as a subsys_initcall() as well, and has its own\ndependencies that may be sensitive to initcall ordering, deferring\nacpi_init() is not an option.\n\nSo instead, split off the workqueue allocation into its own postcore\ninitcall, as this is the only missing piece to allow EFI runtime calls\nto be made. This ensures that EFI runtime call (including PRM calls) are\naccessible to all code running at subsys_initcall() level.", "old": null }, "type": "description" }, { "details": { "new": "efi: Allocate runtime workqueue before ACPI init", "old": null }, "type": "title" }, { "details": [ "linux", "linux$PRODUCT$linux_kernel" ], "type": "first_time" }, { "details": { "added": [ "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*" ], "removed": [] }, "type": "cpes" }, { "details": { "added": [ "linux", "linux$PRODUCT$linux_kernel" ], "removed": [] }, "type": "vendors" }, { "details": { "added": [ "https://git.kernel.org/stable/c/13c6da02e767152c9ac4330962247a5e47011035", "https://git.kernel.org/stable/c/29cd94e678fcb3c4fd0f359deeac6d61334323fc", "https://git.kernel.org/stable/c/6996e954ae830f5b793ba6cf449885ca519dbdd2", "https://git.kernel.org/stable/c/c32a1fbe0f9a48453a552bb315cc4f1e7a74084e", "https://git.kernel.org/stable/c/e871549f7894ad4114b3dd53f241aa25a268ba8b" ], "removed": [] }, "type": "references" } ], "id": "02e7765a-be5a-4956-a18e-0258d8be811a" }, { "created": "2026-07-20T12:15:00+00:00", "data": [ { "details": { "added": [ "CWE-476" ], "removed": [] }, "type": "weaknesses" }, { "details": { "added": [ "https://lore.kernel.org/linux-cve-announce/2026071939-CVE-2026-64183-ffa6@gregkh/T", "https://nvd.nist.gov/vuln/detail/CVE-2026-64183", "https://www.cve.org/CVERecord?id=CVE-2026-64183" ], "removed": [] }, "type": "references" }, { "details": { "added": { "cvssV3_1": { "score": 5.5, "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H" } }, "removed": {}, "updated": { "threat_severity": { "new": "Low", "old": null } } }, "type": "metrics" } ], "id": "31df9bf9-2120-44ca-8101-6978d5e55c87" }, { "created": "2026-08-11T20:15:00+00:00", "data": [ { "details": { "added": [ "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*" ], "removed": [] }, "type": "cpes" } ], "id": "39f8dbe6-0a3c-4350-807c-ccf7e285249c" } ], "cpes": { "data": [ "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*" ], "providers": [ "mitre", "nvd" ] }, "created": { "data": "2026-07-19T00:00:00+00:00", "provider": "redhat" }, "description": { "data": "In the Linux kernel, the following vulnerability has been resolved:\n\nefi: Allocate runtime workqueue before ACPI init\n\nSince commit\n\n 5894cf571e14 (\"acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers\")\n\nACPI PRM calls are delegated to a workqueue which runs in a kernel\nthread, making it easier to detect and mitigate faulting memory accesses\nperformed by the firmware.\n\nRafael reports that such PRM accesses may occur before efisubsys_init()\nexecutes, which is where the workqueue is allocated, leading to NULL\npointer dereferences. Since acpi_init() [which triggers the early PRM\naccesses] executes as a subsys_initcall() as well, and has its own\ndependencies that may be sensitive to initcall ordering, deferring\nacpi_init() is not an option.\n\nSo instead, split off the workqueue allocation into its own postcore\ninitcall, as this is the only missing piece to allow EFI runtime calls\nto be made. This ensures that EFI runtime call (including PRM calls) are\naccessible to all code running at subsys_initcall() level.", "provider": "mitre" }, "metrics": { "cvssV2_0": { "data": {}, "provider": null }, "cvssV3_0": { "data": {}, "provider": null }, "cvssV3_1": { "data": { "score": 5.5, "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H" }, "provider": "nvd" }, "cvssV4_0": { "data": {}, "provider": null }, "epss": { "data": { "score": 0.00162 }, "provider": "first" }, "kev": { "data": {}, "provider": null }, "ssvc": { "data": {}, "provider": null }, "threat_severity": { "data": "Low", "provider": "redhat" } }, "references": { "data": [ "https://git.kernel.org/stable/c/13c6da02e767152c9ac4330962247a5e47011035", "https://git.kernel.org/stable/c/29cd94e678fcb3c4fd0f359deeac6d61334323fc", "https://git.kernel.org/stable/c/6996e954ae830f5b793ba6cf449885ca519dbdd2", "https://git.kernel.org/stable/c/c32a1fbe0f9a48453a552bb315cc4f1e7a74084e", "https://git.kernel.org/stable/c/e871549f7894ad4114b3dd53f241aa25a268ba8b", "https://lore.kernel.org/linux-cve-announce/2026071939-CVE-2026-64183-ffa6@gregkh/T", "https://nvd.nist.gov/vuln/detail/CVE-2026-64183", "https://www.cve.org/CVERecord?id=CVE-2026-64183" ], "providers": [ "mitre", "nvd", "redhat" ] }, "title": { "data": "efi: Allocate runtime workqueue before ACPI init", "provider": "mitre" }, "updated": { "data": "2026-08-11T20:05:55.917000+00:00", "provider": "nvd" }, "vendors": { "data": [ "linux", "linux$PRODUCT$linux_kernel" ], "providers": [ "mitre", "nvd", "enrichment" ] }, "weaknesses": { "data": [ "CWE-476" ], "providers": [ "nvd", "redhat" ] } }, "redhat": { "cpes": [], "created": "2026-07-19T00:00:00+00:00", "description": "A flaw was found in the Linux kernel's EFI (Extensible Firmware Interface) runtime services. This vulnerability occurs due to a NULL pointer dereference when ACPI (Advanced Configuration and Power Interface) PRM (Platform Runtime Mechanism) calls are made before the necessary workqueue is allocated. This can lead to system instability or crashes, resulting in a denial of service.", "metrics": { "cvssV2_0": {}, "cvssV3_0": {}, "cvssV3_1": { "score": 5.5, "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H" }, "threat_severity": "Low" }, "redhat_repo_path": "2026/CVE-2026-64183.json", "references": [ "https://lore.kernel.org/linux-cve-announce/2026071939-CVE-2026-64183-ffa6@gregkh/T", "https://nvd.nist.gov/vuln/detail/CVE-2026-64183", "https://www.cve.org/CVERecord?id=CVE-2026-64183" ], "title": "kernel: efi: Allocate runtime workqueue before ACPI init", "updated": "2026-07-19T00:00:00+00:00", "vendors": [], "weaknesses": [ "CWE-476" ] } }