Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%

Buy Us a Coffee

CVE-2026-99024— optee: register TEE devices only once fully initialized

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： optee：仅在完全初始化后注册 TEE 设备 optee_probe() 函数在 struct optee 的其余部分尚未初始化完成之前，就先后针对客户端设备和 supplicant（辅助）设备调用了 tee_device_register()。 tee_device_register() 会调用 cdev_device_add()，该函数同时执行两项操作：创建 /dev/tee0 和 /dev/teepriv0 设备节点，并将设备链接到 tee 设备类中，以便 cl

AI Predicted 8.8 Difficulty: Moderate EPSS 0.17% · P6 Updated Oct 23, 2026

Possible ATT&CK Techniques 3 AI

T1203 · Exploitation for Client Execution T1562.003 T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 12

Vendor	Product	Version Range	Status
Linux	Linux	`4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2< 262062c01f5a817104c88bf6eacb7c6ffdc7018d`	affected
		`4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2< 8cae1605be8a047ae3a62df07b9474d61462c4f6`	affected
		`4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2< 681adbc9c7a820279582a295e183fa6a1d1b4ec4`	affected
		`4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2< 2f7240f0a6fd83df274fc0a2abf0609b4e6bd388`	affected
		`4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2< c108feca0a096f8db25d1b69130035025e9e936d`	affected
		`4.12`	affected
		`< 4.12`	unaffected
		`6.6.160≤ 6.6.*`	unaffected
… +4 more rows

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

optee: register TEE devices only once fully initialized

Source: CVE Program / CVE List V5

Vulnerability Description

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]

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 ~ 262062c01f5a817104c88bf6eacb7c6ffdc7018d	-
Linux	Linux	4.12	-

II. Public POCs for CVE-2026-99024

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-99024

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-99024 (5)

https://www.cve.org/CVERecord?id=CVE-2026-99024

Same Patch Batch · Linux · 2026-10-23 · 217 CVEs total

CVE-2026-98959	9.8 CRITICAL	btrfs: fix xattr replace when multiple xattrs are packed in the same item
CVE-2026-99078	9.8 CRITICAL	net/mlx5e: Prevent stale XSK buffer release on MPWQE refill retry
CVE-2026-99079	9.8 CRITICAL	net/mlx5e: Prevent stale XSK buffer release on refill retry
CVE-2026-98988	8.8 HIGH	namespace: keep covered mounts covered in OPEN_TREE_NAMESPACE
CVE-2026-99083	8.8 HIGH	ksmbd: fix heap out-of-bounds write in krb5_authenticate()
CVE-2026-99082	8.8 HIGH	KVM: x86: Use active memslots for the per-vCPU MMIO cache
CVE-2026-98870	8.8 HIGH	ksmbd: remove stale channels from all sessions on teardown
CVE-2026-98980	8.8 HIGH	namei: don't reveal overmounted entries in refwalk
CVE-2026-98981	8.8 HIGH	namespace: unhash a dentry before detaching the mounts on it
CVE-2026-99042	8.4 HIGH	io_uring/net: populate CONNECT filter fields for 24-byte sockaddr_in6
CVE-2026-98978	8.4 HIGH	namespace: never expire a locked mount
CVE-2026-99064	8.1 HIGH	cipso: adjust cached option offsets when removing CIPSO
CVE-2026-98968	8.1 HIGH	amt: send the relay's General Query directly from the receive path
CVE-2026-98899	7.8 HIGH	netfilter: ipset: mark the rcu locked areas properly
CVE-2026-99018	7.8 HIGH	riscv: entry: gate shadow call stack reload on sstatus.SPP, not tp
CVE-2026-99002	7.8 HIGH	drm/vmwgfx: validate pitch coming from userspace
CVE-2026-99016	7.8 HIGH	riscv: futex: untag the user pointer before the atomic access
CVE-2026-99051	7.8 HIGH	fsverity: RCU-delay the freeing of struct fsverity_info
CVE-2026-99032	7.8 HIGH	net/smc: protect clcsock lifetime in smc_getname
CVE-2026-98999	7.8 HIGH	drm/xe: Fix stale pinned_link entry when fb-pin performs the final unpin

Showing top 20 of 217 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux