{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50028", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T12:17:06.066Z", "datePublished": "2024-10-21T19:39:31.809Z", "dateUpdated": "2026-08-05T11:41:04.376Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:41:04.376Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: core: Reference count the zone in thermal_zone_get_by_id()\n\nThere are places in the thermal netlink code where nothing prevents\nthe thermal zone object from going away while being accessed after it\nhas been returned by thermal_zone_get_by_id().\n\nTo address this, make thermal_zone_get_by_id() get a reference on the\nthermal zone device object to be returned with the help of get_device(),\nunder thermal_list_lock, and adjust all of its callers to this change\nwith the help of the cleanup.h infrastructure." } ], "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 - The vulnerable handlers are reached through the thermal generic-netlink family via a local AF_NETLINK socket, not from any remote peer. Per kernel scoring guidance, netlink-reachable code is Local.\nAC:L - The attacker fully controls and can continuously repeat the read side (unlimited TZ_GET_TEMP/TRIP/GOV requests from many threads), and the free side leaves a very wide window (list_del under thermal_list_lock, then cancel_delayed_work_sync, device_del and wait_for_completion before kfree), so a zone teardown from any routine event (driver/module removal, device hot-unplug, power-supply/charger removal, CPU hotplug or suspend/resume) is reliably won; the stale pointer can also be held across preemption.\nPR:L - The thermal genl ops carry no GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM flag, so genl_family_rcv_msg() applies no capability check — any unprivileged local user can open NETLINK_GENERIC and issue these commands with an arbitrary zone id.\nUI:N - Exploitation is entirely driven by the attacker's own netlink requests plus a concurrent zone teardown; no victim action is needed at any point.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Contents of the freed thermal_zone_device are copied directly back to the attacker in the netlink reply — trip temperatures/types, the governor name via a stale tz->governor pointer dereference, and a trip loop bounded by num_trips read from freed memory, giving an effectively unbounded heap read primitive after reclaim.\nI:H - The handlers write into the freed object (mutex_lock on tz->lock) and, in the GET_TEMP path, make an indirect call through tz->ops.get_temp read out of freed slab memory, which after a heap spray yields attacker-controlled control-flow hijack and arbitrary kernel modification.\nA:H - Even unweaponized, dereferencing and locking the freed thermal zone (and calling a stale ops pointer) causes memory corruption and kernel oops/panic, repeatable at will by an unprivileged process." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/thermal/thermal_core.c", "drivers/thermal/thermal_core.h", "drivers/thermal/thermal_netlink.c" ], "versions": [ { "version": "1ce50e7d408ef2bdc8ca021363fd46d1b8bfad00", "lessThan": "c95538b286efc6109c987e97a051bc7844ede802", "status": "affected", "versionType": "git" }, { "version": "1ce50e7d408ef2bdc8ca021363fd46d1b8bfad00", "lessThan": "a42a5839f400e929c489bb1b58f54596c4535167", "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/thermal/thermal_core.c", "drivers/thermal/thermal_core.h", "drivers/thermal/thermal_netlink.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.4", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "5.9", "versionEndExcluding": "6.11.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c95538b286efc6109c987e97a051bc7844ede802" }, { "url": "https://git.kernel.org/stable/c/a42a5839f400e929c489bb1b58f54596c4535167" } ], "title": "thermal: core: Reference count the zone in thermal_zone_get_by_id()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50028", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-22T13:26:28.280587Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:28:46.203Z" } } ] } }