{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68383", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.387Z", "datePublished": "2026-08-10T12:04:02.230Z", "dateUpdated": "2026-08-17T05:04:29.739Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:04:29.739Z" }, "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)" } ], "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "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" ], "versions": [ { "version": "6bd90e700b4285e6a7541e00f969cab0d696adde", "lessThan": "77fd62412431e8c80ef2ad61466bc76fe425f80a", "status": "affected", "versionType": "git" }, { "version": "6bd90e700b4285e6a7541e00f969cab0d696adde", "lessThan": "299bc6d50b1bed7d1f408391736712f01a0855e2", "status": "affected", "versionType": "git" }, { "version": "b17fcce70733c211cb5dabf54f4f9491920b1d92", "status": "affected", "versionType": "git" }, { "version": "ba37807d08bae67de6139346a85650cab5f6145a", "status": "affected", "versionType": "git" }, { "version": "683b0e397dad9f26a42dcacf6f7f545a77ce6c06", "status": "affected", "versionType": "git" }, { "version": "6.12.43", "lessThan": "6.13", "status": "affected", "versionType": "semver" }, { "version": "6.15.11", "lessThan": "6.16", "status": "affected", "versionType": "semver" }, { "version": "6.16.2", "lessThan": "6.17", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "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" ], "versions": [ { "version": "6.17", "status": "affected" }, { "version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "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": "6.12.43" }, { "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" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/77fd62412431e8c80ef2ad61466bc76fe425f80a" }, { "url": "https://git.kernel.org/stable/c/299bc6d50b1bed7d1f408391736712f01a0855e2" } ], "title": "drm/xe/guc: Keep scheduler timeline name alive", "x_generator": { "engine": "bippy-1.2.0" } } } }