266 lines
13 KiB
JSON
266 lines
13 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-2026-68383",
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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": "2026-07-30T09:28:09.387Z",
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"datePublished": "2026-08-10T12:04:02.230Z",
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"dateUpdated": "2026-10-21T12:43:54.357Z"
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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": "2026-10-21T12:43:54.357Z"
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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\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)"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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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/gpu/drm/xe/xe_guc_exec_queue_types.h",
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"drivers/gpu/drm/xe/xe_guc_submit.c"
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],
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"versions": [
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{
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"version": "b17fcce70733c211cb5dabf54f4f9491920b1d92",
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"lessThan": "eac2839585741e6c1b4af261a0b58bca0d6f5436",
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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": "6bd90e700b4285e6a7541e00f969cab0d696adde",
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"lessThan": "88c38ff74f8345fcf8852549f94025754019b037",
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"status": "affected",
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"status": "affected",
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{
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"lessThan": "299bc6d50b1bed7d1f408391736712f01a0855e2",
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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": "ba37807d08bae67de6139346a85650cab5f6145a",
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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": "683b0e397dad9f26a42dcacf6f7f545a77ce6c06",
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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": "6.12.43",
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"lessThan": "6.12.114",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.15.11",
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"lessThan": "6.16",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.16.2",
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"lessThan": "6.17",
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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/gpu/drm/xe/xe_guc_exec_queue_types.h",
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"drivers/gpu/drm/xe/xe_guc_submit.c"
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],
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"versions": [
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{
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"version": "6.17",
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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": "6.17",
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"status": "unaffected",
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},
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{
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"version": "6.12.114",
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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": "6.18.57",
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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": "7.1.6",
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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": "6.12.43",
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"versionEndExcluding": "6.12.114"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/eac2839585741e6c1b4af261a0b58bca0d6f5436"
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},
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{
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"url": "https://git.kernel.org/stable/c/88c38ff74f8345fcf8852549f94025754019b037"
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},
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{
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"url": "https://git.kernel.org/stable/c/77fd62412431e8c80ef2ad61466bc76fe425f80a"
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},
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{
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"url": "https://git.kernel.org/stable/c/299bc6d50b1bed7d1f408391736712f01a0855e2"
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}
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],
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"title": "drm/xe/guc: Keep scheduler timeline name alive",
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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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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-68383",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:47:46.046450Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-19T21:09:07.235Z"
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}
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}
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]
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}
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} |