CVE-2026-99024

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99024", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.386Z", "datePublished": "2026-10-23T12:21:08.551Z", "dateUpdated": "2026-10-30T12:41:00.882Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:41:00.882Z"}, "descriptions": [{"lang": "en", "value": "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]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tee/optee/ffa_abi.c", "drivers/tee/optee/smc_abi.c"], "versions": [{"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "8de131e1a2ab379641bb475f1bcb472a1a1d75df", "status": "affected", "versionType": "git"}, {"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "db36c37a2c3f13d5fd0f1afd8e2391d6c50793e6", "status": "affected", "versionType": "git"}, {"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "6b21a716ccab7fa42e8dfa3118000bc5274004ab", "status": "affected", "versionType": "git"}, {"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "262062c01f5a817104c88bf6eacb7c6ffdc7018d", "status": "affected", "versionType": "git"}, {"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "8cae1605be8a047ae3a62df07b9474d61462c4f6", "status": "affected", "versionType": "git"}, {"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "681adbc9c7a820279582a295e183fa6a1d1b4ec4", "status": "affected", "versionType": "git"}, {"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "2f7240f0a6fd83df274fc0a2abf0609b4e6bd388", "status": "affected", "versionType": "git"}, {"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "lessThan": "c108feca0a096f8db25d1b69130035025e9e936d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tee/optee/ffa_abi.c", "drivers/tee/optee/smc_abi.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8de131e1a2ab379641bb475f1bcb472a1a1d75df"}, {"url": "https://git.kernel.org/stable/c/db36c37a2c3f13d5fd0f1afd8e2391d6c50793e6"}, {"url": "https://git.kernel.org/stable/c/6b21a716ccab7fa42e8dfa3118000bc5274004ab"}, {"url": "https://git.kernel.org/stable/c/262062c01f5a817104c88bf6eacb7c6ffdc7018d"}, {"url": "https://git.kernel.org/stable/c/8cae1605be8a047ae3a62df07b9474d61462c4f6"}, {"url": "https://git.kernel.org/stable/c/681adbc9c7a820279582a295e183fa6a1d1b4ec4"}, {"url": "https://git.kernel.org/stable/c/2f7240f0a6fd83df274fc0a2abf0609b4e6bd388"}, {"url": "https://git.kernel.org/stable/c/c108feca0a096f8db25d1b69130035025e9e936d"}], "title": "optee: register TEE devices only once fully initialized", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tee/optee/ffa_abi.c", "drivers/tee/optee/smc_abi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8de131e1a2ab379641bb475f1bcb472a1a1d75df", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}, {"lessThan": "db36c37a2c3f13d5fd0f1afd8e2391d6c50793e6", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}, {"lessThan": "6b21a716ccab7fa42e8dfa3118000bc5274004ab", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}, {"lessThan": "262062c01f5a817104c88bf6eacb7c6ffdc7018d", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}, {"lessThan": "8cae1605be8a047ae3a62df07b9474d61462c4f6", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}, {"lessThan": "681adbc9c7a820279582a295e183fa6a1d1b4ec4", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}, {"lessThan": "2f7240f0a6fd83df274fc0a2abf0609b4e6bd388", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}, {"lessThan": "c108feca0a096f8db25d1b69130035025e9e936d", "status": "affected", "version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tee/optee/ffa_abi.c", "drivers/tee/optee/smc_abi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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]"}], "id": "CVE-2026-99024", "lastModified": "2026-10-30T13:21:38.727", "metrics": {}, "published": "2026-10-23T13:17:25.357", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/262062c01f5a817104c88bf6eacb7c6ffdc7018d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f7240f0a6fd83df274fc0a2abf0609b4e6bd388"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/681adbc9c7a820279582a295e183fa6a1d1b4ec4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b21a716ccab7fa42e8dfa3118000bc5274004ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8cae1605be8a047ae3a62df07b9474d61462c4f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8de131e1a2ab379641bb475f1bcb472a1a1d75df"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c108feca0a096f8db25d1b69130035025e9e936d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/db36c37a2c3f13d5fd0f1afd8e2391d6c50793e6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: optee: register TEE devices only once fully initialized", "id": "2559726", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559726"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\noptee: register TEE devices only once fully initialized\noptee_probe() called tee_device_register() on both the client and the\nsupplicant device before the rest of struct optee had been initialized.\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.\nA context opened in that window can run against a struct optee where\n- optee->call_queue.mutex is not initialized by optee_cq_init()\n- optee->supp mutex and completions is not initialized by\noptee_supp_init()\n- optee->rpmb_dev_mutex is not initialized yet,\n- the message argument cache is not initialized by\noptee_shm_arg_cache_init()\n- optee->ctx is still NULL\nAny open session or invoke during this window takes uninitialized\nmutexes and dereferences a NULL pointer.\nFix it by moving both tee_device_register() calls down to the point\nwhere all of struct optee is set up.\n[JW: adding fixes and cc]", "A flaw was found in the Linux kernel's OP-TEE (Open Portable Trusted Execution Environment) driver. The driver registers device interfaces before internal data structures are fully initialized. A local user can access the device during this initialization window, triggering uninitialized mutex operations and a NULL pointer dereference. This issue leads to a kernel crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-99024", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99024\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99024\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99024.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,262062c01f5a817104c88bf6eacb7c6ffdc7018d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,8cae1605be8a047ae3a62df07b9474d61462c4f6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,681adbc9c7a820279582a295e183fa6a1d1b4ec4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,2f7240f0a6fd83df274fc0a2abf0609b4e6bd388)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,c108feca0a096f8db25d1b69130035025e9e936d)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,262062c01f5a817104c88bf6eacb7c6ffdc7018d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,8cae1605be8a047ae3a62df07b9474d61462c4f6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,681adbc9c7a820279582a295e183fa6a1d1b4ec4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,2f7240f0a6fd83df274fc0a2abf0609b4e6bd388)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2,c108feca0a096f8db25d1b69130035025e9e936d)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"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": "4.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T15:30:14.845121+00:00", "updated": "2026-10-29T14:30:16.099682+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-665", "CWE-476"]}