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CVE-2026-93283— i3c: master: Fix device_register() error path

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，以下漏洞已修复： i3c: 主控制器：修复 device_register() 错误处理路径 当 中调用 失败时，会调用 来释放 所获取的引用计数。由于这是最后一个引用，因此设备的释放回调 会被触发，并导致 被释放。 由此引发两个问题： 1. 中执行了 ，但由于 仍然指向描述符本身，因此会发出警告。应在调用 之前将该字段清零。 2. 释放 后， 仍指向已释放的内存区域，因此也应将其清零。此举可防止例如 在检测到 非 NULL 时对其进行解引用，从而避免潜在的空指针解引用或非法内存访问。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 26

VendorProduct Version RangeStatus
Linux Linux 1832ed55df45f4145335ad992fb83813cdc58b5d< 5bf498623f8397d45f85f14cd631c5e5a565c2fb affected
d48fe8d98171e0fffdeaa8b37ce0a6444bff819b< 20a2b6df91fd782ef2ff551febef594d0b46a9a7 affected
174ae0a3b89e7804e4ea3d31bd83d6e43f39568c< a14dbdf471001dd0601b0c491184990c178a199c affected
e49a51a96b531f1b4bcd8d358e645b6c74ef67e6< d22ad96f1a0c89e0ba66a2facc7430f0923919e3 affected
cab63f64887616e3c4e31cfd8103320be6ebc8d3< 7f8e2c4f3704d9774bb26b49b1ad6a60ae57d4a0 affected
cab63f64887616e3c4e31cfd8103320be6ebc8d3< 7ef12e1dd06e442eebf370f6e53c41bd056d0f22 affected
cab63f64887616e3c4e31cfd8103320be6ebc8d3< 6ecf17bf5fe8da51a6e3fc9e03a76898fcc5c6cf affected
cab63f64887616e3c4e31cfd8103320be6ebc8d3< 74be657d98a8d684c0475f3cbd450ef2a30ffc73 affected
… +18 more rows
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I. Basic Information for CVE-2026-93283

Vulnerability Information
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Vulnerability Title
i3c: master: Fix device_register() error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix device_register() error path When device_register() fails in i3c_master_register_new_i3c_devs(), put_device() is called to drop the reference taken by device_register(). That drops the last reference, so the device's release callback i3c_device_release() runs and frees the i3c_device. Two problems follow from that: i3c_device_release() does WARN_ON(i3cdev->desc), so it warns because desc->dev->desc still points back at the descriptor. Clear it before calling put_device(). After put_device() frees the i3c_device, desc->dev is left pointing at freed memory, so clear desc->dev as well. That prevents, for example, i3c_master_unregister_i3c_devs() seeing desc->dev as non-NULL and dereferencing it.
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 1832ed55df45f4145335ad992fb83813cdc58b5d ~ 5bf498623f8397d45f85f14cd631c5e5a565c2fb -
Linux Linux 6.7 -

II. Public POCs for CVE-2026-93283

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III. Intelligence Information for CVE-2026-93283

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Patches & Fixes for CVE-2026-93283 (7)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93221 8.1 HIGH nfsd: convert nfsd_net boolean flags to unsigned long flags word
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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