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CVE-2026-99001— drm/xe/i2c: cancel the client work on remove

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： drm/xe/i2c：在移除时取消客户端工作项 会将 DesignWare 适配器存储于 中，并在该适配器于 xe I2C 平台设备下注册时调度 ；随后， 会在该适配器上实例化 AMC 客户端设备。 负责拆除 AMC 结构、注销客户端设备、总线通知器以及适配器平台设备，但它从未对 进行排空（drain）处理。当适配器被注销时，若仍有工作项处于队列中或正在运行，则 会在 释放适配器之后尝试解引用 。此外，该工作项嵌入在通过 机制分配的 中；因此，若在工作项仍排队时 DRM

AI Predicted 7.8 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux f0e53aadd702c64b2c2090996751c9be043f9e80< 2efa187fd4c9b8d7edcae0c1acf46739ce39fd01 affected
f0e53aadd702c64b2c2090996751c9be043f9e80< 175d654cd48320ad52d0f82dc3f4e3c063c3c5ca affected
f0e53aadd702c64b2c2090996751c9be043f9e80< 611857adc9e7b0ee1239a0baf38498922ca5a12e affected
6.17 affected
< 6.17 unaffected
6.18.58≤ 6.18.* unaffected
7.2.11≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-99001

Vulnerability Information
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Vulnerability Title
drm/xe/i2c: cancel the client work on remove
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe/i2c: cancel the client work on remove xe_i2c_notifier() stores the DesignWare adapter in i2c->adapter and schedules i2c->work when the adapter is registered under the xe I2C platform device, and xe_i2c_client_work() then instantiates the AMC client device on that adapter. xe_i2c_remove() tears down the AMC, unregisters the client devices, the bus notifier and the adapter platform device, but it never drains i2c->work. A work item that is still queued or running when the adapter is unregistered dereferences i2c->adapter in i2c_new_client_device() after platform_device_unregister() has released the adapter. The work item is also embedded in the devm-allocated struct xe_i2c, so a work item still queued after the drm device devm unwind frees that allocation runs its callback on freed memory. The bus notifier is the only thing that schedules this work, and it is unregistered after the client devices. An instance that is still queued when the teardown runs can therefore write i2c->client[XE_I2C_CLIENT_AMC] while the loop is unregistering and clearing the same array, and an AMC client it instantiates late is only cleaned up by the adapter's own child sweep in i2c_del_adapter(). Move bus_unregister_notifier() in front of the client teardown loop and cancel the work right after it, so no new instance can be scheduled and a queued instance is drained before the client array is touched. A running instance still finds a live adapter, since the adapter is unregistered later. (cherry picked from commit a23f27d5ec11c3f418c5e5531eea34ccda2b5b20)
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 f0e53aadd702c64b2c2090996751c9be043f9e80 ~ 2efa187fd4c9b8d7edcae0c1acf46739ce39fd01 -
Linux Linux 6.17 -

II. Public POCs for CVE-2026-99001

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III. Intelligence Information for CVE-2026-99001

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Patches & Fixes for CVE-2026-99001 (3)

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-2026-98993 7.8 HIGH namespace: don't inherit MNT_UMOUNT in clone_mnt()
CVE-2026-99053 7.8 HIGH tipc: hold a reference to nodes found by link name
CVE-2026-99054 7.8 HIGH tipc: destroy topsrv workqueues before closing connections
CVE-2026-99056 7.8 HIGH strparser: make sure __strp_recv isn't running before tearing down the parser
CVE-2026-99002 7.8 HIGH drm/vmwgfx: validate pitch coming from userspace
CVE-2026-98899 7.8 HIGH netfilter: ipset: mark the rcu locked areas properly
CVE-2026-99006 7.8 HIGH drm/i915/gem: Prevent overstepping exec array boundary

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

IV. Related Vulnerabilities

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Same vendor: Linux