CVE-2026-93283

i3c: master: Fix device_register() error path

State: Published
Severity: Not scored
Published: Sep 24, 2026
Updated: Oct 19, 2026
Reserved: Sep 17, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1832ed55df45f4145335ad992fb83813cdc58b5d to before 5bf498623f8397d45f85f14cd631c5e5a565c2fbAffected d48fe8d98171e0fffdeaa8b37ce0a6444bff819b to before 20a2b6df91fd782ef2ff551febef594d0b46a9a7Affected 174ae0a3b89e7804e4ea3d31bd83d6e43f39568c to before a14dbdf471001dd0601b0c491184990c178a199cAffected e49a51a96b531f1b4bcd8d358e645b6c74ef67e6 to before d22ad96f1a0c89e0ba66a2facc7430f0923919e3Affected cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 7f8e2c4f3704d9774bb26b49b1ad6a60ae57d4a0Affected cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 7ef12e1dd06e442eebf370f6e53c41bd056d0f22Affected cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 6ecf17bf5fe8da51a6e3fc9e03a76898fcc5c6cfAffected cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 74be657d98a8d684c0475f3cbd450ef2a30ffc73Affected 204beeb509d37669de34560e83bb8abffe7ee63aAffected b24cf43d9babf1265a2bb0ae8d198267cef43b83Affected 5.10.201 to before 5.10.270Affected 5.15.139 to before 5.15.221Affected 6.1.63 to before 6.1.188Affected 6.6.2 to before 6.6.157Affected 5.4.261 to before 5.5Affected 6.5.12 to before 6.6Affected
LinuxLinux	6.7Affected before 6.7Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

1832ed55df45f4145335ad992fb83813cdc58b5d to before 5bf498623f8397d45f85f14cd631c5e5a565c2fbAffected
d48fe8d98171e0fffdeaa8b37ce0a6444bff819b to before 20a2b6df91fd782ef2ff551febef594d0b46a9a7Affected
174ae0a3b89e7804e4ea3d31bd83d6e43f39568c to before a14dbdf471001dd0601b0c491184990c178a199cAffected
e49a51a96b531f1b4bcd8d358e645b6c74ef67e6 to before d22ad96f1a0c89e0ba66a2facc7430f0923919e3Affected
cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 7f8e2c4f3704d9774bb26b49b1ad6a60ae57d4a0Affected
cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 7ef12e1dd06e442eebf370f6e53c41bd056d0f22Affected
cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 6ecf17bf5fe8da51a6e3fc9e03a76898fcc5c6cfAffected
cab63f64887616e3c4e31cfd8103320be6ebc8d3 to before 74be657d98a8d684c0475f3cbd450ef2a30ffc73Affected
204beeb509d37669de34560e83bb8abffe7ee63aAffected
b24cf43d9babf1265a2bb0ae8d198267cef43b83Affected
5.10.201 to before 5.10.270Affected
5.15.139 to before 5.15.221Affected
6.1.63 to before 6.1.188Affected
6.6.2 to before 6.6.157Affected
5.4.261 to before 5.5Affected
6.5.12 to before 6.6Affected

LinuxLinux

6.7Affected
before 6.7Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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