{ "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" } } } }