{"id":"CVE-2026-68383","state":"PUBLISHED","title":"drm/xe/guc: Keep scheduler timeline name alive","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Keep scheduler timeline name alive\n\nThe scheduler keeps a pointer to the timeline name, but q->name\nis freed with the exec queue while scheduler fences can still\nreference it.\n\nStore the name in struct xe_guc_exec_queue so it shares\nthe scheduler's RCU-deferred lifetime.\n\n(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)","publishedAt":"2026-08-10T12:04:02.230Z","updatedAt":"2026-10-21T12:43:54.357Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b17fcce70733c211cb5dabf54f4f9491920b1d92","status":"affected","lessThan":"eac2839585741e6c1b4af261a0b58bca0d6f5436","versionType":"git"},{"version":"6bd90e700b4285e6a7541e00f969cab0d696adde","status":"affected","lessThan":"88c38ff74f8345fcf8852549f94025754019b037","versionType":"git"},{"version":"6bd90e700b4285e6a7541e00f969cab0d696adde","status":"affected","lessThan":"77fd62412431e8c80ef2ad61466bc76fe425f80a","versionType":"git"},{"version":"6bd90e700b4285e6a7541e00f969cab0d696adde","status":"affected","lessThan":"299bc6d50b1bed7d1f408391736712f01a0855e2","versionType":"git"},{"version":"ba37807d08bae67de6139346a85650cab5f6145a","status":"affected","versionType":"git"},{"version":"683b0e397dad9f26a42dcacf6f7f545a77ce6c06","status":"affected","versionType":"git"},{"version":"6.12.43","status":"affected","lessThan":"6.12.114","versionType":"semver"},{"version":"6.15.11","status":"affected","lessThan":"6.16","versionType":"semver"},{"version":"6.16.2","status":"affected","lessThan":"6.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_guc_exec_queue_types.h","drivers/gpu/drm/xe/xe_guc_submit.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_guc_exec_queue_types.h","drivers/gpu/drm/xe/xe_guc_submit.c"]}],"references":["https://git.kernel.org/stable/c/eac2839585741e6c1b4af261a0b58bca0d6f5436","https://git.kernel.org/stable/c/88c38ff74f8345fcf8852549f94025754019b037","https://git.kernel.org/stable/c/77fd62412431e8c80ef2ad61466bc76fe425f80a","https://git.kernel.org/stable/c/299bc6d50b1bed7d1f408391736712f01a0855e2"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68383.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68383","state":"PUBLISHED","datePublished":"2026-08-10T12:04:02.230Z","dateUpdated":"2026-10-21T12:43:54.357Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.387Z"},"containers":{"cna":{"title":"drm/xe/guc: Keep scheduler timeline name alive","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Keep scheduler timeline name alive\n\nThe scheduler keeps a pointer to the timeline name, but q->name\nis freed with the exec queue while scheduler fences can still\nreference it.\n\nStore the name in struct xe_guc_exec_queue so it shares\nthe scheduler's RCU-deferred lifetime.\n\n(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b17fcce70733c211cb5dabf54f4f9491920b1d92","status":"affected","lessThan":"eac2839585741e6c1b4af261a0b58bca0d6f5436","versionType":"git"},{"version":"6bd90e700b4285e6a7541e00f969cab0d696adde","status":"affected","lessThan":"88c38ff74f8345fcf8852549f94025754019b037","versionType":"git"},{"version":"6bd90e700b4285e6a7541e00f969cab0d696adde","status":"affected","lessThan":"77fd62412431e8c80ef2ad61466bc76fe425f80a","versionType":"git"},{"version":"6bd90e700b4285e6a7541e00f969cab0d696adde","status":"affected","lessThan":"299bc6d50b1bed7d1f408391736712f01a0855e2","versionType":"git"},{"version":"ba37807d08bae67de6139346a85650cab5f6145a","status":"affected","versionType":"git"},{"version":"683b0e397dad9f26a42dcacf6f7f545a77ce6c06","status":"affected","versionType":"git"},{"version":"6.12.43","status":"affected","lessThan":"6.12.114","versionType":"semver"},{"version":"6.15.11","status":"affected","lessThan":"6.16","versionType":"semver"},{"version":"6.16.2","status":"affected","lessThan":"6.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_guc_exec_queue_types.h","drivers/gpu/drm/xe/xe_guc_submit.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/xe/xe_guc_exec_queue_types.h","drivers/gpu/drm/xe/xe_guc_submit.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/eac2839585741e6c1b4af261a0b58bca0d6f5436"},{"url":"https://git.kernel.org/stable/c/88c38ff74f8345fcf8852549f94025754019b037"},{"url":"https://git.kernel.org/stable/c/77fd62412431e8c80ef2ad61466bc76fe425f80a"},{"url":"https://git.kernel.org/stable/c/299bc6d50b1bed7d1f408391736712f01a0855e2"}],"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 - Exploitation requires ioctls on the local DRM render node (/dev/dri/renderD128) plus a sync_file fd held by the attacker's process; there is no remote or adjacent-network path into the xe exec-queue lifecycle.\nAC:L - No race is needed — once __xe_exec_queue_free() kfree()s the queue, sched->name is permanently dangling, so the attacker performs create-queue, export fence, destroy queue, groom the slab, then read, and can retry indefinitely.\nPR:L - XE_EXEC_QUEUE_CREATE/DESTROY, XE_EXEC, SYNCOBJ_EXPORT_SYNC_FILE and SYNC_IOC_FILE_INFO are all DRM_RENDER_ALLOW with no DRM_AUTH or capability gate, so any local user with render-node access (default for desktop sessions, Android/ChromeOS apps, GPU-passthrough containers) qualifies.\nUI:N - The attacker drives the whole sequence inside its own process using its own exec queue and its own exported fence; no victim action or configuration change is required.\nS:U - The use-after-free is on kernel slab memory and its impact stays inside the kernel's own security authority; no VM, IOMMU or hypervisor boundary is crossed.\nC:H - sync_fill_fence_info() strscpy()s from the freed q->name and copy_to_user()s the result, so after reallocating the freed xe_exec_queue slot the attacker reads back kernel heap contents (pointers, residual data) repeatably — a kernel memory disclosure primitive.\nI:H - This is a use-after-free on a kfree()d slab object whose contents the attacker grooms; the stale pointer is dereferenced as a string by kernel and tracepoint consumers, and UAF of an attacker-controllable slot is leverageable for corruption and control-flow influence.\nA:H - Dereferencing the dangling name pointer after the slab page is returned to the buddy allocator, or scanning for a NUL past the freed object, faults in kernel context and oopses the machine, which any unprivileged render-node user can trigger at will."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:43:54.357Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.43","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-68383","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:47:46.046450Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","type":"CWE","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T21:09:07.235Z"}}]}}}