{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98859","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.376Z","datePublished":"2026-10-18T15:51:20.456Z","dateUpdated":"2026-10-21T12:57:37.465Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-21T12:57:37.465Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: multitouch: stop the release timer from being rearmed on remove\n\nmt_remove() quiesces the sticky-finger timer before stopping the\nhardware:\n\n    timer_delete_sync(&td->release_timer);\n\n    sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);\n    hid_hw_stop(hdev);\n\ntimer_delete_sync() waits for a running callback and dequeues the timer,\nbut it does not stop the timer from being armed again. The transport is\nstill delivering reports at that point, and the report path rearms it:\n\n    if (app->quirks & MT_QUIRK_STICKY_FINGERS) {\n        if (td->mt_io_flags & MT_IO_SLOTS_MASK)\n            mod_timer(&td->release_timer,\n                      jiffies + msecs_to_jiffies(100));\n\nA report that arrives after timer_delete_sync() has returned therefore\nleaves the timer queued. td is allocated with devm_kzalloc() against\nhdev->dev, so it is freed when the driver is unbound, after mt_remove()\nreturns. When the timer fires afterwards, mt_expired_timeout()\ndereferences the freed td:\n\n    struct mt_device *td = timer_container_of(td, t, release_timer);\n    struct hid_device *hdev = td->hdev;\n\n    if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))\n\nSimply moving the teardown after hid_hw_stop() does not fix this on its\nown, because mt_expired_timeout() calls mt_release_contacts(), which\nwalks hdev->inputs; the timer still has to be quiesced before\nhid_hw_stop() tears the input devices down.\n\nUse timer_shutdown_sync() instead, which additionally makes any later\nmod_timer() a no-op, so neither ordering constraint has to be traded off\nagainst the other. This is the final-teardown pattern the function was\nintroduced for, and hid-wiimote already uses it for the same reason."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-multitouch.c"],"versions":[{"version":"4f4001bc76fd1a138a501fbd3d68cce72cbf96ce","lessThan":"3776f34fbce990af45978f1628d2e1adc0d67d0f","status":"affected","versionType":"git"},{"version":"4f4001bc76fd1a138a501fbd3d68cce72cbf96ce","lessThan":"1f1bd9a3117f082eb891c0986c4f0e04cd974c9a","status":"affected","versionType":"git"},{"version":"4f4001bc76fd1a138a501fbd3d68cce72cbf96ce","lessThan":"0c19a6c1d25fd5ed66d1f80dc6f6e56cc1f0a787","status":"affected","versionType":"git"},{"version":"4f4001bc76fd1a138a501fbd3d68cce72cbf96ce","lessThan":"a0125ca86e405b8a704e96157a6c10ca51087652","status":"affected","versionType":"git"},{"version":"4f4001bc76fd1a138a501fbd3d68cce72cbf96ce","lessThan":"5acb2dace582f061aab5e14c399ac9480315f44b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-multitouch.c"],"versions":[{"version":"4.13","status":"affected"},{"version":"0","lessThan":"4.13","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3776f34fbce990af45978f1628d2e1adc0d67d0f"},{"url":"https://git.kernel.org/stable/c/1f1bd9a3117f082eb891c0986c4f0e04cd974c9a"},{"url":"https://git.kernel.org/stable/c/0c19a6c1d25fd5ed66d1f80dc6f6e56cc1f0a787"},{"url":"https://git.kernel.org/stable/c/a0125ca86e405b8a704e96157a6c10ca51087652"},{"url":"https://git.kernel.org/stable/c/5acb2dace582f061aab5e14c399ac9480315f44b"}],"title":"HID: multitouch: stop the release timer from being rearmed on remove","x_generator":{"engine":"bippy-1.2.0"}}}}