{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-68244", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-68244", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-12-16T14:21:21.277Z", "updatedAt": "2026-05-11T21:49:37.318Z", "importedAt": "2026-10-24T01:57:44.935Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "drm/i915: Avoid lock inversion when pinning to GGTT on CHV/BXT+VTD", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: Avoid lock inversion when pinning to GGTT on CHV/BXT+VTD\n\nOn completion of i915_vma_pin_ww(), a synchronous variant of\ndma_fence_work_commit() is called. When pinning a VMA to GGTT address\nspace on a Cherry View family processor, or on a Broxton generation SoC\nwith VTD enabled, i.e., when stop_machine() is then called from\nintel_ggtt_bind_vma(), that can potentially lead to lock inversion among\nreservation_ww and cpu_hotplug locks.\n\n[86.861179] ======================================================\n[86.861193] WARNING: possible circular locking dependency detected\n[86.861209] 6.15.0-rc5-CI_DRM_16515-gca0305cadc2d+ #1 Tainted: G U\n[86.861226] ------------------------------------------------------\n[86.861238] i915_module_loa/1432 is trying to acquire lock:\n[86.861252] ffffffff83489090 (cpu_hotplug_lock){++++}-{0:0}, at: stop_machine+0x1c/0x50\n[86.861290]\nbut task is already holding lock:\n[86.861303] ffffc90002e0b4c8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_vma_pin.constprop.0+0x39/0x1d0 [i915]\n[86.862233]\nwhich lock already depends on the new lock.\n[86.862251]\nthe existing dependency chain (in reverse order) is:\n[86.862265]\n-> #5 (reservation_ww_class_mutex){+.+.}-{3:3}:\n[86.862292] dma_resv_lockdep+0x19a/0x390\n[86.862315] do_one_initcall+0x60/0x3f0\n[86.862334] kernel_init_freeable+0x3cd/0x680\n[86.862353] kernel_init+0x1b/0x200\n[86.862369] ret_from_fork+0x47/0x70\n[86.862383] ret_from_fork_asm+0x1a/0x30\n[86.862399]\n-> #4 (reservation_ww_class_acquire){+.+.}-{0:0}:\n[86.862425] dma_resv_lockdep+0x178/0x390\n[86.862440] do_one_initcall+0x60/0x3f0\n[86.862454] kernel_init_freeable+0x3cd/0x680\n[86.862470] kernel_init+0x1b/0x200\n[86.862482] ret_from_fork+0x47/0x70\n[86.862495] ret_from_fork_asm+0x1a/0x30\n[86.862509]\n-> #3 (&mm->mmap_lock){++++}-{3:3}:\n[86.862531] down_read_killable+0x46/0x1e0\n[86.862546] lock_mm_and_find_vma+0xa2/0x280\n[86.862561] do_user_addr_fault+0x266/0x8e0\n[86.862578] exc_page_fault+0x8a/0x2f0\n[86.862593] asm_exc_page_fault+0x27/0x30\n[86.862607] filldir64+0xeb/0x180\n[86.862620] kernfs_fop_readdir+0x118/0x480\n[86.862635] iterate_dir+0xcf/0x2b0\n[86.862648] __x64_sys_getdents64+0x84/0x140\n[86.862661] x64_sys_call+0x1058/0x2660\n[86.862675] do_syscall_64+0x91/0xe90\n[86.862689] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[86.862703]\n-> #2 (&root->kernfs_rwsem){++++}-{3:3}:\n[86.862725] down_write+0x3e/0xf0\n[86.862738] kernfs_add_one+0x30/0x3c0\n[86.862751] kernfs_create_dir_ns+0x53/0xb0\n[86.862765] internal_create_group+0x134/0x4c0\n[86.862779] sysfs_create_group+0x13/0x20\n[86.862792] topology_add_dev+0x1d/0x30\n[86.862806] cpuhp_invoke_callback+0x4b5/0x850\n[86.862822] cpuhp_issue_call+0xbf/0x1f0\n[86.862836] __cpuhp_setup_state_cpuslocked+0x111/0x320\n[86.862852] __cpuhp_setup_state+0xb0/0x220\n[86.862866] topology_sysfs_init+0x30/0x50\n[86.862879] do_one_initcall+0x60/0x3f0\n[86.862893] kernel_init_freeable+0x3cd/0x680\n[86.862908] kernel_init+0x1b/0x200\n[86.862921] ret_from_fork+0x47/0x70\n[86.862934] ret_from_fork_asm+0x1a/0x30\n[86.862947]\n-> #1 (cpuhp_state_mutex){+.+.}-{3:3}:\n[86.862969] __mutex_lock+0xaa/0xed0\n[86.862982] mutex_lock_nested+0x1b/0x30\n[86.862995] __cpuhp_setup_state_cpuslocked+0x67/0x320\n[86.863012] __cpuhp_setup_state+0xb0/0x220\n[86.863026] page_alloc_init_cpuhp+0x2d/0x60\n[86.863041] mm_core_init+0x22/0x2d0\n[86.863054] start_kernel+0x576/0xbd0\n[86.863068] x86_64_start_reservations+0x18/0x30\n[86.863084] x86_64_start_kernel+0xbf/0x110\n[86.863098] common_startup_64+0x13e/0x141\n[86.863114]\n-> #0 (cpu_hotplug_lock){++++}-{0:0}:\n[86.863135] __lock_acquire+0x16\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "7d1c2618eac590d948eb33b9807d913ddb6e105f", "status": "affected", "versionType": "git", "lessThan": "e988634d7aae7214818b9c86cd7ef9e78c84b02d" }, { "version": "7d1c2618eac590d948eb33b9807d913ddb6e105f", "status": "affected", "versionType": "git", "lessThan": "20d94a6117b752fd10a78cefdc1cf2c16706048b" }, { "version": "7d1c2618eac590d948eb33b9807d913ddb6e105f", "status": "affected", "versionType": "git", "lessThan": "3dec22bde207a36f1b8a4b80564cbbe13996a7cd" }, { "version": "7d1c2618eac590d948eb33b9807d913ddb6e105f", "status": "affected", "versionType": "git", "lessThan": "4e73066e3323add260e46eb51f79383d87950281" }, { "version": "7d1c2618eac590d948eb33b9807d913ddb6e105f", "status": "affected", "versionType": "git", "lessThan": "858a50127be714f55c3bcb25621028d4a323d77e" }, { "version": "7d1c2618eac590d948eb33b9807d913ddb6e105f", "status": "affected", "versionType": "git", "lessThan": "84bbe327a5cbb060f3321c9d9d4d53936fc1ef9b" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.13" }, { "version": "5.15.197", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.159", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.117", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.59", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.17.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.17.*" }, { "version": "6.18", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }