{"id":"CVE-2026-80952","revision":"0ea70d22a19b47309e75fc900721880d","records":[{"revision":"0ea70d22a19b47309e75fc900721880d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80952","aliases":[],"title":"i3c: master: Fix info leak and UAF in device unregister path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: Fix info leak and UAF in device unregister path\n\ni3c_master_unregister_i3c_devs() clears i3cdev->dev->desc before\ncalling device_unregister().  During device_unregister(),\ndevice_del() emits a KOBJ_REMOVE uevent and unbinds the driver while\nthe device descriptor is still expected to be valid.  As a result,\ni3c_device_uevent() and a racing modalias_show() can observe a NULL\ndesc and fall back to an uninitialized stack struct i3c_device_info,\nleaking kernel stack contents in the generated modalias.  Driver\n.remove() callbacks may also encounter an unexpected NULL desc during\nunbind.\n\nKeep desc valid until device_unregister() has completed.  Since\ndevice_unregister() drops the device reference and may free the device,\ntake an extra reference with get_device() before unregistering.  Clear\ndesc afterwards and release the extra reference with put_device().\nThis preserves the release-time invariant that desc must be NULL while\navoiding both the information leak and a potential use-after-free from\nwriting desc after the device has been released.","state":0,"publishedAt":"2026-09-11T19:42:21.868+00:00","modifiedAt":"2026-10-19T08:45:36.17+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/i3c/master.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"109995153898454c7795c2c299fd0a0b57456a4b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"c64daaaba08e490c8347ff60aacac4dd51249f91\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"ef72ff6650c4ebf2b444708d84df66db42f262d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"94fb9786d67a8f8b899e77381620f86bad94fdf7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"4837be0f9ac2efe5e83b35a696b6242c473d280c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0\",\n                            \"lessThan\": \"d2c743efd2d1ee64e94324664808f623dd865872\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/i3c/master.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/334cfb5e285cece5dc49fb3fb8ea9b70b2cb5d7e","https://git.kernel.org/stable/c/109995153898454c7795c2c299fd0a0b57456a4b","https://git.kernel.org/stable/c/c64daaaba08e490c8347ff60aacac4dd51249f91","https://git.kernel.org/stable/c/ef72ff6650c4ebf2b444708d84df66db42f262d9","https://git.kernel.org/stable/c/c16b6f25e0cc2dd1055dde1256cbf5a9e888cf49","https://git.kernel.org/stable/c/94fb9786d67a8f8b899e77381620f86bad94fdf7","https://git.kernel.org/stable/c/4837be0f9ac2efe5e83b35a696b6242c473d280c","https://git.kernel.org/stable/c/d2c743efd2d1ee64e94324664808f623dd865872"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80952","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80952","identifiers":["CVE-2026-80952"]},"retained":false,"historicalAffected":[]}],"coverage":[]}