optee: register TEE devices only once fully initialized
In the Linux kernel, the following vulnerability has been resolved: optee: register TEE devices only once fully initialized optee_probe() called tee_device_register() on both the client and the supplicant device before the rest of struct optee had been initialized. tee_device_register() calls cdev_device_add(), which does two things at once: it creates /dev/tee0 and /dev/teepriv0, and it links the device into the tee class so that class_find_device() can find it. From that moment on the device is reachable both from user space via tee_open() and from kernel space via tee_client_open_context(). The only gate in teedev_open() is tee_device_get(), which merely checks that teedev->desc is non-NULL, which was already set by tee_device_alloc(). Therefore, there is effectively no gate at all. A context opened in that window can run against a struct optee where - optee->call_queue.mutex is not initialized by optee_cq_init() - optee->supp mutex and completions is not initialized by optee_supp_init() - optee->rpmb_dev_mutex is not initialized yet, - the message argument cache is not initialized by optee_shm_arg_cache_init() - optee->ctx is still NULL Any open session or invoke during this window takes uninitialized mutexes and dereferences a NULL pointer. Fix it by moving both tee_device_register() calls down to the point where all of struct optee is set up. [JW: adding fixes and cc]
CVE-2026-99024
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-99024
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2",
"lessThan": "262062c01f5a817104c88bf6eacb7c6ffdc7018d",
"versionType": "git"
},
{
"status": "affected",
"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2",
"lessThan": "8cae1605be8a047ae3a62df07b9474d61462c4f6",
"versionType": "git"
},
{
"status": "affected",
"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2",
"lessThan": "681adbc9c7a820279582a295e183fa6a1d1b4ec4",
"versionType": "git"
},
{
"status": "affected",
"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2",
"lessThan": "2f7240f0a6fd83df274fc0a2abf0609b4e6bd388",
"versionType": "git"
},
{
"status": "affected",
"version": "4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2",
"lessThan": "c108feca0a096f8db25d1b69130035025e9e936d",
"versionType": "git"
}
],
"programFiles": [
"drivers/tee/optee/ffa_abi.c",
"drivers/tee/optee/smc_abi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.11",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/tee/optee/ffa_abi.c",
"drivers/tee/optee/smc_abi.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-99024
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52859 · Revision 1
- Added to Heist Feed
- Publisher date