Invalid kernel-memory dereference via dangling I3C pointer
Published Sep 24, 2026 · Updated Sep 24, 2026
Use-after-free in the Linux kernel I3C core allows attackers to cause an invalid kernel-memory dereference via unspecified vectors. The i3c_master_register_new_i3c_devs() error path calls put_device(), freeing i3c_device while desc->dev still points to it. Triggering requires I3C device discovery and a device_register() failure; the public patch establishes no attacker control or impact beyond the warning and stale-pointer dereference.
Summary
What happened
Use-after-free in the Linux kernel I3C core allows attackers to cause an invalid kernel-memory dereference via unspecified vectors. The i3c_master_register_new_i3c_devs() error path calls put_device(), freeing i3c_device while desc->dev still points to it. Triggering requires I3C device discovery and a device_register() failure; the public patch establishes no attacker control or impact beyond the warning and stale-pointer dereference.
The record
- CVE
- CVE-2026-93283
- Published
- Sep 24, 2026
- Updated
- Sep 24, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 24, 2026CVE publishedPublication date reported by the CVE source.
- Sep 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=174ae0a3b89e7804e4ea3d31bd83d6e43f39568c <a14dbdf471001dd0601b0c491184990c178a199c
- Affected versionversion=1832ed55df45f4145335ad992fb83813cdc58b5d <5bf498623f8397d45f85f14cd631c5e5a565c2fb
- Affected versionversion=204beeb509d37669de34560e83bb8abffe7ee63a
- Affected versionversion=5.10.201 <5.10.270
- Affected versionversion=5.15.139 <5.15.221
- Affected versionversion=5.4.261 <5.5
- Affected versionversion=6.1.63 <6.1.188
- Affected versionversion=6.5.12 <6.6
- Affected versionversion=6.6.2 <6.6.157
- Affected versionversion=6.7
- Affected versionversion=b24cf43d9babf1265a2bb0ae8d198267cef43b83
- Affected versionversion=cab63f64887616e3c4e31cfd8103320be6ebc8d3 <6ecf17bf5fe8da51a6e3fc9e03a76898fcc5c6cf
- Affected versionversion=cab63f64887616e3c4e31cfd8103320be6ebc8d3 <74be657d98a8d684c0475f3cbd450ef2a30ffc73
- Affected versionversion=cab63f64887616e3c4e31cfd8103320be6ebc8d3 <7ef12e1dd06e442eebf370f6e53c41bd056d0f22
- Affected versionversion=cab63f64887616e3c4e31cfd8103320be6ebc8d3 <7f8e2c4f3704d9774bb26b49b1ad6a60ae57d4a0
- Affected versionversion=d48fe8d98171e0fffdeaa8b37ce0a6444bff819b <20a2b6df91fd782ef2ff551febef594d0b46a9a7
- Affected versionversion=e49a51a96b531f1b4bcd8d358e645b6c74ef67e6 <d22ad96f1a0c89e0ba66a2facc7430f0923919e3
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
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Technologies
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