CVE-2026-68383 (GCVE-0-2026-68383)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:04 – Updated: 2026-08-17 05:04
VLAI
Title
drm/xe/guc: Keep scheduler timeline name alive
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc: Keep scheduler timeline name alive The scheduler keeps a pointer to the timeline name, but q->name is freed with the exec queue while scheduler fences can still reference it. Store the name in struct xe_guc_exec_queue so it shares the scheduler's RCU-deferred lifetime. (cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6bd90e700b4285e6a7541e00f969cab0d696adde , < 77fd62412431e8c80ef2ad61466bc76fe425f80a (git)
Affected: 6bd90e700b4285e6a7541e00f969cab0d696adde , < 299bc6d50b1bed7d1f408391736712f01a0855e2 (git)
Affected: b17fcce70733c211cb5dabf54f4f9491920b1d92 (git)
Affected: ba37807d08bae67de6139346a85650cab5f6145a (git)
Affected: 683b0e397dad9f26a42dcacf6f7f545a77ce6c06 (git)
Affected: 6.12.43 , < 6.13 (semver)
Affected: 6.15.11 , < 6.16 (semver)
Affected: 6.16.2 , < 6.17 (semver)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc_exec_queue_types.h",
            "drivers/gpu/drm/xe/xe_guc_submit.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6bd90e700b4285e6a7541e00f969cab0d696adde",
              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b17fcce70733c211cb5dabf54f4f9491920b1d92",
              "versionType": "git"
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            {
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              "versionType": "git"
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          "vendor": "Linux",
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        }
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      "cpeApplicability": [
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                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
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                },
                {
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
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          "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-\u003ename\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\u0027s RCU-deferred lifetime.\n\n(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)"
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "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\u0027s process; there is no remote or adjacent-network path into the xe exec-queue lifecycle.\nAC:L - No race is needed \u2014 once __xe_exec_queue_free() kfree()s the queue, sched-\u003ename 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\u0027s own security authority; no VM, IOMMU or hypervisor boundary is crossed.\nC:H - sync_fill_fence_info() strscpy()s from the freed q-\u003ename 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 \u2014 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": {
        "dateUpdated": "2026-08-17T05:04:29.739Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68383",
    "datePublished": "2026-08-10T12:04:02.230Z",
    "dateReserved": "2026-07-30T09:28:09.387Z",
    "dateUpdated": "2026-08-17T05:04:29.739Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-68383",
      "date": "2026-08-20",
      "epss": "0.00129",
      "percentile": "0.03007"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68383\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:31.483\",\"lastModified\":\"2026-08-17T06:17:46.817\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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-\u003ename\\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\u0027s RCU-deferred lifetime.\\n\\n(cherry picked from commit 41075f0eb5dcbd3b065d15f15ef7bbe9315188e8)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/xe/xe_guc_exec_queue_types.h\",\"drivers/gpu/drm/xe/xe_guc_submit.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6bd90e700b4285e6a7541e00f969cab0d696adde\",\"lessThan\":\"77fd62412431e8c80ef2ad61466bc76fe425f80a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6bd90e700b4285e6a7541e00f969cab0d696adde\",\"lessThan\":\"299bc6d50b1bed7d1f408391736712f01a0855e2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b17fcce70733c211cb5dabf54f4f9491920b1d92\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ba37807d08bae67de6139346a85650cab5f6145a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"683b0e397dad9f26a42dcacf6f7f545a77ce6c06\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.12.43\",\"lessThan\":\"6.13\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.15.11\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.16.2\",\"lessThan\":\"6.17\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/xe/xe_guc_exec_queue_types.h\",\"drivers/gpu/drm/xe/xe_guc_submit.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/299bc6d50b1bed7d1f408391736712f01a0855e2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/77fd62412431e8c80ef2ad61466bc76fe425f80a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T23:27:19+00:00",
      "cve": "CVE-2026-68383",
      "id": "CVE-2026-68383",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "92",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/xe/guc: Keep scheduler timeline name alive",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68383.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-13T01:28:06Z",
      "cve": "CVE-2026-68383",
      "id": "CVE-2026-68383",
      "initial_release_date": "2026-08-12T16:22:25Z",
      "product_status:known_affected": "82",
      "product_status:known_not_affected": "214",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68383",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68383.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.