{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89599", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.731Z", "datePublished": "2026-09-11T19:45:02.112Z", "dateUpdated": "2026-10-19T08:49:31.606Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:49:31.606Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: omapfb: panel-dsi-cm: initialize lock before registering display\n\ndsicm_probe() registers the display before initializing ddata->lock.\nOnce omapdss_register_display() publishes the display, another consumer\ncan reach a dsicm callback that takes this mutex while it is still\nuninitialized.\n\nInitialize the mutex before registering the display so the published\ncallbacks always see a valid lock." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is in the OMAP DSI command-mode panel driver: dsicm_probe() publishes dsicm_ops via omapdss_register_display(), and those callbacks are reached from local omapfb probe, FBIOBLANK, and omapfb ioctls on /dev/fb*. There is no network, Bluetooth/WiFi, or USB protocol path into this code.\nAC:L - On preemptible kernels dsicm_probe() can be preempted after omapdss_register_display() adds the panel to panel_list and before mutex_init(&ddata->lock). Concurrent omapfb_probe then calls dsicm_enable/enable_te/update on that published device, so the race is driven by the in-kernel consumer rather than an uninfluenced hardware lottery.\nPR:N - dsicm_probe() and the omapfb consumer (omapfb_init_display → driver->enable/update) run from platform/deferred probe during boot on boards with an omapdss,panel-dsi-cm node. That path has no capable() or credential check and needs no OS account.\nUI:N - Display registration and omapfb’s subsequent enable/update run automatically during device enumeration on affected TI OMAP systems; no victim must open /dev/fb*, write sysfs, or mount a filesystem.\nS:U - Uninitialized-mutex use and any follow-on lock or DSI-state corruption remain inside the host omapfb/omapdss driver. This is not a VM escape, IOMMU bypass, or other cross-authority impact.\nC:H - A consumer that wins the race mutex_lock()s kzalloc’d ddata->lock (NULL wait_list); probe can then mutex_init() a lock another thread still holds so two threads enter dsicm_enable/update. That lock-state corruption is kernel memory-unsafety that can be leveraged for disclosure, not a small bounded leak.\nI:H - mutex_init() of a mutex another thread still holds resets owner and wait_list while dsicm callbacks run unsynchronized against DSI bus and panel_drv_data state, giving write and control-flow primitives rather than a pure crash.\nA:H - CONFIG_DEBUG_MUTEXES treats lock-used-without-init as an oops, and a corrupted mutex wait_list or double-entry into DSI enable/disable causes a kernel oops, panic, or hang, fully denying availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c" ], "versions": [ { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "ef20d4e17d7fb0d83144caa9667e6f3198288993", "status": "affected", "versionType": "git" }, { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "e7023d18c4eb292f886b31a3576402cb0e357df7", "status": "affected", "versionType": "git" }, { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "f33a96e49284589257e90ddc4394ec0c6bf11ec4", "status": "affected", "versionType": "git" }, { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "302d19fbc7dc7e9f498930c66d65ff711ba5ba9f", "status": "affected", "versionType": "git" }, { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "2c3f8c9c995db185284b079f39177e85b2258176", "status": "affected", "versionType": "git" }, { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "76818e81cfcae33b09b739de09162c7d8d89bf0b", "status": "affected", "versionType": "git" }, { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "09db79078f25c048cfb5d7849795c70415ab8574", "status": "affected", "versionType": "git" }, { "version": "f76ee892a99e68b55402b8d4b8aeffcae2aff34d", "lessThan": "f8e43fe0f22b7137ce456e6fe3581d3098174f74", "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/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c" ], "versions": [ { "version": "4.5", "status": "affected" }, { "version": "0", "lessThan": "4.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.4", "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": "4.5", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "6.12.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "6.18.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ef20d4e17d7fb0d83144caa9667e6f3198288993" }, { "url": "https://git.kernel.org/stable/c/e7023d18c4eb292f886b31a3576402cb0e357df7" }, { "url": "https://git.kernel.org/stable/c/f33a96e49284589257e90ddc4394ec0c6bf11ec4" }, { "url": "https://git.kernel.org/stable/c/302d19fbc7dc7e9f498930c66d65ff711ba5ba9f" }, { "url": "https://git.kernel.org/stable/c/2c3f8c9c995db185284b079f39177e85b2258176" }, { "url": "https://git.kernel.org/stable/c/76818e81cfcae33b09b739de09162c7d8d89bf0b" }, { "url": "https://git.kernel.org/stable/c/09db79078f25c048cfb5d7849795c70415ab8574" }, { "url": "https://git.kernel.org/stable/c/f8e43fe0f22b7137ce456e6fe3581d3098174f74" } ], "title": "fbdev: omapfb: panel-dsi-cm: initialize lock before registering display", "x_generator": { "engine": "bippy-1.2.0" } } } }