224 lines
12 KiB
JSON
224 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-80660",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-26T14:34:25.780Z",
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"datePublished": "2026-08-28T06:49:04.992Z",
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"dateUpdated": "2026-08-28T06:49:04.992Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-28T06:49:04.992Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (occ) unregister sysfs devices outside occ lock\n\nocc_active(false) and occ_shutdown() unregister sysfs-backed devices while\nocc->lock is held. hwmon_device_unregister() and sysfs_remove_group() can\nwait for active sysfs callbacks to drain, and those callbacks can enter the\nOCC update path and try to take occ->lock again. That gives the unregister\npaths the lock ordering occ->lock -> sysfs callback drain, while a callback\nhas the opposite edge sysfs callback -> occ->lock.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the real unregister and callback carrier:\n\n occ_shutdown()\n hwmon_device_unregister()\n occ_show_temp_1()\n occ_update_response()\n\nLockdep reported the circular dependency with occ_shutdown() already\nholding the OCC mutex and hwmon_device_unregister() waiting on the sysfs\nside:\n\n WARNING: possible circular locking dependency detected\n ... (sysfs_lock) ... at: hwmon_device_unregister+0x12/0x30 [vuln_msv]\n ... (&test_occ.lock) ... at: occ_shutdown.constprop.0+0xe/0x40 [vuln_msv]\n occ_update_response.isra.0+0xb/0x20 [vuln_msv]\n occ_show_temp_1.constprop.0.isra.0+0x23/0x40 [vuln_msv]\n *** DEADLOCK ***\n\nSerialize hwmon registration and removal with a separate hwmon_lock.\nUnder that lock, detach occ->hwmon and update occ->active while occ->lock\nis held so concurrent OCC state changes still see a stable state, then\ndrop occ->lock before calling hwmon_device_unregister(). Remove the\ndriver sysfs group before taking occ->lock in occ_shutdown(), so draining\nthe driver attributes cannot wait while the OCC mutex is held. Also make\nOCC update callbacks return -ENODEV after deactivation, so callbacks that\nalready passed sysfs active protection do not poll the hardware after\nteardown has detached the hwmon device."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/hwmon/occ/common.c",
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"drivers/hwmon/occ/common.h"
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],
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"versions": [
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{
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"version": "849b0156d9960da628a06756bb920d9571c15e66",
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"lessThan": "2a4c80ff3571498ec6a916273304b6650026b1b0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "849b0156d9960da628a06756bb920d9571c15e66",
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"lessThan": "e7fd81e9fb1fe476d2131fec66c1138457810ed4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "849b0156d9960da628a06756bb920d9571c15e66",
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"lessThan": "2092952f22a7da98e76e84139ae202b1fc7ba899",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "849b0156d9960da628a06756bb920d9571c15e66",
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"lessThan": "f0aad157576da199c146c1bb266442befa7912ca",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "849b0156d9960da628a06756bb920d9571c15e66",
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"lessThan": "7ee43ec8e6774774abbe9dc3027225e01bc964a5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "849b0156d9960da628a06756bb920d9571c15e66",
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"lessThan": "e31408734332b8cc611342cdaaab6ba492180156",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "bc8a32726774286325b0cb0daab55b682cafc1ef",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.15.216",
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"lessThan": "5.16",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/hwmon/occ/common.c",
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"drivers/hwmon/occ/common.h"
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],
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"versions": [
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{
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"version": "5.19",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.19",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.178",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.145",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.97",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.1.178"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.6.145"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.12.97"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "6.18.40"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "7.1.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.19",
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"versionEndExcluding": "7.2"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.15.216"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/2a4c80ff3571498ec6a916273304b6650026b1b0"
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},
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{
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"url": "https://git.kernel.org/stable/c/e7fd81e9fb1fe476d2131fec66c1138457810ed4"
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},
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{
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"url": "https://git.kernel.org/stable/c/2092952f22a7da98e76e84139ae202b1fc7ba899"
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},
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{
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"url": "https://git.kernel.org/stable/c/f0aad157576da199c146c1bb266442befa7912ca"
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},
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{
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"url": "https://git.kernel.org/stable/c/7ee43ec8e6774774abbe9dc3027225e01bc964a5"
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},
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{
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"url": "https://git.kernel.org/stable/c/e31408734332b8cc611342cdaaab6ba492180156"
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}
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],
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"title": "hwmon: (occ) unregister sysfs devices outside occ lock",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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} |