CVE-2026-80952i3c: master: Fix info leak and UAF in device unregister path
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix info leak and UAF in device unregister path i3c_master_unregister_i3c_devs() clears i3cdev->dev->desc before calling device_unregister(). During device_unregister(), device_del() emits a KOBJ_REMOVE uevent and unbinds the driver while the device descriptor is still expected to be valid. As a result, i3c_device_uevent() and a racing modalias_show() can observe a NULL desc and fall back to an uninitialized stack struct i3c_device_info, leaking kernel stack contents in the generated modalias. Driver .remove() callbacks may also encounter an unexpected NULL desc during unbind. Keep desc valid until device_unregister() has completed. Since device_unregister() drops the device reference and may free the device, take an extra reference with get_device() before unregistering. Clear desc afterwards and release the extra reference with put_device(). This preserves the release-time invariant that desc must be NULL while avoiding both the information leak and a potential use-after-free from writing desc after the device has been released.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 109995153898454c7795c2c299fd0a0b57456a4b
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < c64daaaba08e490c8347ff60aacac4dd51249f91
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < ef72ff6650c4ebf2b444708d84df66db42f262d9
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 94fb9786d67a8f8b899e77381620f86bad94fdf7
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < 4837be0f9ac2efe5e83b35a696b6242c473d280c
- affected 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 – < d2c743efd2d1ee64e94324664808f623dd865872
- affected 5.0
- unaffected < 5.0
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e (opens in a new tab)
- https://git.kernel.org/stable/c/109995153898454c7795c2c299fd0a0b57456a4b (opens in a new tab)
- https://git.kernel.org/stable/c/c64daaaba08e490c8347ff60aacac4dd51249f91 (opens in a new tab)
- https://git.kernel.org/stable/c/ef72ff6650c4ebf2b444708d84df66db42f262d9 (opens in a new tab)
- https://git.kernel.org/stable/c/c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49 (opens in a new tab)
- https://git.kernel.org/stable/c/94fb9786d67a8f8b899e77381620f86bad94fdf7 (opens in a new tab)
- https://git.kernel.org/stable/c/4837be0f9ac2efe5e83b35a696b6242c473d280c (opens in a new tab)
- https://git.kernel.org/stable/c/d2c743efd2d1ee64e94324664808f623dd865872 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76275 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80952)Record last updated .