CVE-2026-98945

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98945", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.381Z", "datePublished": "2026-10-23T12:19:04.191Z", "dateUpdated": "2026-10-26T06:56:55.094Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-26T06:56:55.094Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: steam: Rearrange teardown sequence\n\nThis fixes a narrow window during the teardown sequence where callbacks\ncould still be scheduled during cleanup that would then have a dangling\npointer to the now-freed steam struct.\n\nThis also puts work canceling for rumble and mode switch in\nsteam_unregister, as that shouldn't persist while the client hdev is open."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - `uhid_char_write()` accepts `UHID_CREATE2` with `BUS_USB` and Valve 0x28de:0x1205, causing `hid_add_device()` to bind `steam_probe()` and create the FF input device. The local actor races `evdev_write(EV_FF)` with `UHID_DESTROY`, whose `uhid_dev_destroy()` path reaches the patched `steam_remove()`.\nAC:L - `steam_play_effect()` queues `coalesce_rumble_work` for HZ/20; repeated EV_FF writes can queue it after old `steam_remove()` cancels work but before `steam_input_unregister()` removes evdev. The attacker controls both EV_FF submission and UHID teardown, making the race repeatable.\nPR:L - `uhid_char_write()`, `uhid_dev_create2()`, and `evdev_write()` contain no capability or namespace-admin check; access is governed by device-node DAC. An ordinary logged-in user granted `/dev/uhid` and the created `/dev/input/event*` therefore needs only low privileges.\nUI:N - The attacking process creates the forged Steam Deck, uploads and plays rumble, and destroys its own UHID device; the delayed work then runs automatically. No victim must plug in hardware, open a file, or approve an action.\nS:U - `steam_remove()` releases the devm-allocated `struct steam_device`, and the stale work item subsequently accesses memory within the same host kernel. No VM, IOMMU, or other security-authority boundary is crossed.\nC:H - `steam_coalesce_rumble_cb()` reads freed `rumble_left/right`, then `steam_haptic_rumble()` follows the freed `steam->hdev` into HID report metadata. Reclaiming these slabs makes the UAF reads attacker-directed, supporting high confidentiality impact.\nI:H - `steam_coalesce_rumble_cb()` locks the freed `report_mutex`, can requeue the embedded freed work item, and `steam_send_report()` dispatches through `steam->hdev->ll_driver->raw_request`. Controlled slab reuse therefore permits write and control-flow corruption.\nA:H - The delayed `steam_coalesce_rumble_cb()` or `steam_haptic_rumble_cb()` can run after devres frees `steam`, so its mutex, workqueue, and HID dereferences can oops or panic the kernel. The actor can recreate the UHID device and repeat the teardown."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-steam.c"], "versions": [{"version": "9cd61c8179781344315c2a9816977ea415c5459e", "lessThan": "d2587923d50c8b141ce0ccb284c714cf6054d6a7", "status": "affected", "versionType": "git"}, {"version": "9cd61c8179781344315c2a9816977ea415c5459e", "lessThan": "81a8209c09f9be7eef860ca6cc154749a6b4d243", "status": "affected", "versionType": "git"}, {"version": "9cd61c8179781344315c2a9816977ea415c5459e", "lessThan": "86724f4bcf6049c3a322f7a7b1f968210059c46a", "status": "affected", "versionType": "git"}, {"version": "9cd61c8179781344315c2a9816977ea415c5459e", "lessThan": "b5ea938ff776306798d3a11485c2475034f92131", "status": "affected", "versionType": "git"}, {"version": "9cd61c8179781344315c2a9816977ea415c5459e", "lessThan": "ddce9641ce924ed91ec8304577e463823a29ffaf", "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-steam.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "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": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "6.3", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d2587923d50c8b141ce0ccb284c714cf6054d6a7"}, {"url": "https://git.kernel.org/stable/c/81a8209c09f9be7eef860ca6cc154749a6b4d243"}, {"url": "https://git.kernel.org/stable/c/86724f4bcf6049c3a322f7a7b1f968210059c46a"}, {"url": "https://git.kernel.org/stable/c/b5ea938ff776306798d3a11485c2475034f92131"}, {"url": "https://git.kernel.org/stable/c/ddce9641ce924ed91ec8304577e463823a29ffaf"}], "title": "HID: steam: Rearrange teardown sequence", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hid/hid-steam.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d2587923d50c8b141ce0ccb284c714cf6054d6a7", "status": "affected", "version": "9cd61c8179781344315c2a9816977ea415c5459e", "versionType": "git"}, {"lessThan": "81a8209c09f9be7eef860ca6cc154749a6b4d243", "status": "affected", "version": "9cd61c8179781344315c2a9816977ea415c5459e", "versionType": "git"}, {"lessThan": "86724f4bcf6049c3a322f7a7b1f968210059c46a", "status": "affected", "version": "9cd61c8179781344315c2a9816977ea415c5459e", "versionType": "git"}, {"lessThan": "b5ea938ff776306798d3a11485c2475034f92131", "status": "affected", "version": "9cd61c8179781344315c2a9816977ea415c5459e", "versionType": "git"}, {"lessThan": "ddce9641ce924ed91ec8304577e463823a29ffaf", "status": "affected", "version": "9cd61c8179781344315c2a9816977ea415c5459e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hid/hid-steam.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: steam: Rearrange teardown sequence\n\nThis fixes a narrow window during the teardown sequence where callbacks\ncould still be scheduled during cleanup that would then have a dangling\npointer to the now-freed steam struct.\n\nThis also puts work canceling for rumble and mode switch in\nsteam_unregister, as that shouldn't persist while the client hdev is open."}], "id": "CVE-2026-98945", "lastModified": "2026-10-26T07:17:18.260", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-23T13:17:15.533", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/81a8209c09f9be7eef860ca6cc154749a6b4d243"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86724f4bcf6049c3a322f7a7b1f968210059c46a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5ea938ff776306798d3a11485c2475034f92131"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2587923d50c8b141ce0ccb284c714cf6054d6a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ddce9641ce924ed91ec8304577e463823a29ffaf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: kernel: Denial of service via use-after-free in Steam HID driver teardown", "id": "2559676", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559676"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nHID: steam: Rearrange teardown sequence\nThis fixes a narrow window during the teardown sequence where callbacks\ncould still be scheduled during cleanup that would then have a dangling\npointer to the now-freed steam struct.\nThis also puts work canceling for rumble and mode switch in\nsteam_unregister, as that shouldn't persist while the client hdev is open.", "A flaw was found in the Linux kernel's Steam Human Interface Device (HID) driver. A timing issue during the device teardown sequence allows scheduled background tasks to access memory after it has been freed. A local attacker could exploit this use-after-free condition to cause a system crash, leading to a Denial of Service (DoS), or potentially escalate privileges."], "name": "CVE-2026-98945", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T12:19:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98945\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98945\nhttps://git.kernel.org/stable/c/81a8209c09f9be7eef860ca6cc154749a6b4d243\nhttps://git.kernel.org/stable/c/86724f4bcf6049c3a322f7a7b1f968210059c46a\nhttps://git.kernel.org/stable/c/b5ea938ff776306798d3a11485c2475034f92131\nhttps://git.kernel.org/stable/c/d2587923d50c8b141ce0ccb284c714cf6054d6a7\nhttps://git.kernel.org/stable/c/ddce9641ce924ed91ec8304577e463823a29ffaf"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,d2587923d50c8b141ce0ccb284c714cf6054d6a7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,81a8209c09f9be7eef860ca6cc154749a6b4d243)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,86724f4bcf6049c3a322f7a7b1f968210059c46a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b5ea938ff776306798d3a11485c2475034f92131)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ddce9641ce924ed91ec8304577e463823a29ffaf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.6.160)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.113)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.57)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.2.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,8.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,d2587923d50c8b141ce0ccb284c714cf6054d6a7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,81a8209c09f9be7eef860ca6cc154749a6b4d243)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,86724f4bcf6049c3a322f7a7b1f968210059c46a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b5ea938ff776306798d3a11485c2475034f92131)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ddce9641ce924ed91ec8304577e463823a29ffaf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.6.160)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.113)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.57)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.2.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,7.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,8.0.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T15:15:14.434850+00:00", "updated": "2026-10-29T22:15:04.248655+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}