CVE-2026-80952

CVE CVE-2026-80952EUVD EUVD-2026-76275Published 2026-09-11T19:42:21.000ZLast changed 2026-09-14T11:59:08.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 6.12.109; patch: 6.18.50; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <ef72ff6650c4ebf2b444708d84df66db42f262d9; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <94fb9786d67a8f8b899e77381620f86bad94fdf7; 5.0; patch: 0; patch: 7.3-rc1; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <4837be0f9ac2efe5e83b35a696b6242c473d280c; patch: 5.15.221; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <109995153898454c7795c2c299fd0a0b57456a4b; patch: 5.10.270; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <c64daaaba08e490c8347ff60aacac4dd51249f91; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <d2c743efd2d1ee64e94324664808f623dd865872; patch: 6.6.157; 3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 <c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49; patch: 6.1.188; patch: 7.2.4

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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