{"id":"CVE-2026-80766","revision":"df8395e87d7e4dc19b6ba41ff0a4206e","records":[{"revision":"df8395e87d7e4dc19b6ba41ff0a4206e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80766","aliases":[],"title":"HID: uclogic: fix use-after-free of inrange_timer on remove","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: uclogic: fix use-after-free of inrange_timer on remove\n\nuclogic_remove() cancels the pen in-range timer and then stops the\ndevice:\n\n\ttimer_delete_sync(&drvdata->inrange_timer);\n\thid_hw_stop(hdev);\n\ntimer_delete_sync() only guarantees the timer is idle at that instant.\nuclogic_raw_event_pen() keeps delivering pen reports until hid_hw_stop()\nstops the transport several lines later, and every report with\npen->inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE re-arms the timer:\n\n\tmod_timer(&drvdata->inrange_timer, jiffies + msecs_to_jiffies(100));\n\nA report landing between the timer_delete_sync() call and the transport\nteardown in hid_hw_stop() re-arms inrange_timer after it was cancelled.\nuclogic_remove() then returns and the devm drvdata is freed, while\nhid_hw_stop() has already freed the input device drvdata->pen_input\npoints at, so when the timer fires ~100 ms later\nuclogic_inrange_timeout() dereferences freed memory -- a use-after-free\nin timer-softirq context.\n\nSwapping the two calls is not a fix: stopping the device first frees\ndrvdata->pen_input via hidinput_disconnect() while the timer may still\nbe pending, so a timer already armed before removal fires on the freed\ninput device in the window before timer_delete_sync() runs.\n\nUse timer_shutdown_sync() before hid_hw_stop() instead. It cancels the\ntimer, waits for a running callback while pen_input is still valid, and\nprevents any further re-arming -- a later mod_timer() from an in-flight\nreport is silently ignored -- so the timer is provably dead before\nhid_hw_stop() frees the inputs. This is the ordering the timer core\ndocuments for this \"timer re-armed from another path\" teardown case.","state":0,"publishedAt":"2026-09-04T15:12:38.52+00:00","modifiedAt":"2026-10-19T08:43:22.787+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/hid/hid-uclogic-core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"f40243358b407aec362fe305fabfcdc94a3abd89\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"dc5108f18f58870a8dd4203a02a47e571a2be7f0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"9d77ac82e57ead056cf3f71d347083ed9244ad90\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"e750cdb6de009aace3c77f37fe2173f96175e8e4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"849e537160bbb77fe419ecc3944bfe125dcd441b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"f1b3ca06380531f49f988f4721d3ed30b0d7a5d2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"f13d0a00204b05e62336da0ab72ea0d87b56690c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01309e29eb95c16bd48984f2589fad0cbf5e27d1\",\n                            \"lessThan\": \"506fd50a9027340f0e9dcc587d10ccb03312dba6\",\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/hid/hid-uclogic-core.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.220\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.187\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.156\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.108\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.47\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.11\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.1\",\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":[],"references":["https://git.kernel.org/stable/c/f40243358b407aec362fe305fabfcdc94a3abd89","https://git.kernel.org/stable/c/dc5108f18f58870a8dd4203a02a47e571a2be7f0","https://git.kernel.org/stable/c/9d77ac82e57ead056cf3f71d347083ed9244ad90","https://git.kernel.org/stable/c/e750cdb6de009aace3c77f37fe2173f96175e8e4","https://git.kernel.org/stable/c/849e537160bbb77fe419ecc3944bfe125dcd441b","https://git.kernel.org/stable/c/f1b3ca06380531f49f988f4721d3ed30b0d7a5d2","https://git.kernel.org/stable/c/f13d0a00204b05e62336da0ab72ea0d87b56690c","https://git.kernel.org/stable/c/506fd50a9027340f0e9dcc587d10ccb03312dba6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80766","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80766","identifiers":["CVE-2026-80766"]},"retained":false,"historicalAffected":[]}],"coverage":[]}