{ "document": { "aggregate_severity": { "text": "Critical" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "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 Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/amazonlinux2els/vex/2026/cve-2026-99024-els_os-amazonlinux2els.json" } ], "tracking": { "current_release_date": "2026-11-07T21:43:10Z", "generator": { "date": "2026-11-07T21:43:10Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-99024-ELS_OS-AMAZONLINUX2ELS", "initial_release_date": "2026-10-23T13:17:00Z", "revision_history": [ { "date": "2026-10-23T13:17:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-11-07T21:43:10Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security 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"vulnerabilities": [ { "cve": "CVE-2026-99024", "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\noptee: register TEE devices only once fully initialized\n\noptee_probe() called tee_device_register() on both the client and the\nsupplicant device before the rest of struct optee had been initialized.\n\ntee_device_register() calls cdev_device_add(), which does two things at\nonce: it creates /dev/tee0 and /dev/teepriv0, and it links the device\ninto the tee class so that class_find_device() can find it. From that\nmoment on the device is reachable both from user space via tee_open()\nand from kernel space via tee_client_open_context(). The only gate in\nteedev_open() is tee_device_get(), which merely checks that\nteedev->desc is non-NULL, which was already set by tee_device_alloc().\nTherefore, there is effectively no gate at all.\n\nA context opened in that window can run against a struct optee where\n\n - optee->call_queue.mutex is not initialized by optee_cq_init()\n - optee->supp mutex and completions is not initialized by\n optee_supp_init()\n - optee->rpmb_dev_mutex is not initialized yet,\n - the message argument cache is not initialized by\n optee_shm_arg_cache_init()\n - optee->ctx is still NULL\n\nAny open session or invoke during this window takes uninitialized\nmutexes and dereferences a NULL pointer.\n\nFix it by moving both tee_device_register() calls down to the point\nwhere all of struct optee is set up.\n\n[JW: adding fixes and cc]", "title": "Vulnerability description" } ], "product_status": { "fixed": [ "Amazon-Linux-2:bpftool-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", 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"url": "https://git.kernel.org/stable/c/2f7240f0a6fd83df274fc0a2abf0609b4e6bd388" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/681adbc9c7a820279582a295e183fa6a1d1b4ec4", "url": "https://git.kernel.org/stable/c/681adbc9c7a820279582a295e183fa6a1d1b4ec4" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/6b21a716ccab7fa42e8dfa3118000bc5274004ab", "url": "https://git.kernel.org/stable/c/6b21a716ccab7fa42e8dfa3118000bc5274004ab" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/8cae1605be8a047ae3a62df07b9474d61462c4f6", "url": "https://git.kernel.org/stable/c/8cae1605be8a047ae3a62df07b9474d61462c4f6" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/8de131e1a2ab379641bb475f1bcb472a1a1d75df", "url": "https://git.kernel.org/stable/c/8de131e1a2ab379641bb475f1bcb472a1a1d75df" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/c108feca0a096f8db25d1b69130035025e9e936d", "url": "https://git.kernel.org/stable/c/c108feca0a096f8db25d1b69130035025e9e936d" }, { "category": "external", "summary": "https://git.kernel.org/stable/c/db36c37a2c3f13d5fd0f1afd8e2391d6c50793e6", "url": "https://git.kernel.org/stable/c/db36c37a2c3f13d5fd0f1afd8e2391d6c50793e6" } ], "release_date": "2026-10-23T13:17:00Z", "remediations": [ { "category": "vendor_fix", "date": "2026-11-05T12:53:42.499096Z", "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1793883221", "product_ids": [ "Amazon-Linux-2:bpftool-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-devel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-headers-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-tools-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", "Amazon-Linux-2:kernel-tools-devel-0:5.10.273-274.1999.amzn2.tuxcare.els1.x86_64", 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