CVE-2026-99003 (GCVE-0-2026-99003)
Vulnerability from cvelistv5
Published
2026-10-23 12:20
Modified
2026-10-23 12:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: validate userspace queue count against initialized firmware slot count In panthor_drv.c:panthor_ioctl_group_create(), the queue count is validated against the hardcoded maximum: if (!args->queues.count || args->queues.count > MAX_CS_PER_CSG) return -EINVAL; However, if the firmware reports fewer slots than MAX_CS_PER_CSG, panthor_fw_init_ifaces() will only initialize that smaller number of stream interfaces. If unprivileged userspace requests more queues than the firmware reported (but no more than MAX_CS_PER_CSG), cs_slot_prog_locked() fetches an uninitialized stream interface and may crash when dereferencing cs_iface->input->ringbuf_base.
References
Impacted products
Vendor Product Version
Linux Linux Version: de85488138247d034eb3241840424a54d660926b
Version: de85488138247d034eb3241840424a54d660926b
Version: de85488138247d034eb3241840424a54d660926b
Version: de85488138247d034eb3241840424a54d660926b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/panthor/panthor_sched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.113",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.57",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.11",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: validate userspace queue count against initialized firmware slot count\n\nIn panthor_drv.c:panthor_ioctl_group_create(),\nthe queue count is validated against the hardcoded maximum:\n\n\tif (!args-\u003equeues.count || args-\u003equeues.count \u003e MAX_CS_PER_CSG)\n\t\treturn -EINVAL;\n\nHowever, if the firmware reports fewer slots than MAX_CS_PER_CSG,\npanthor_fw_init_ifaces() will only initialize that smaller number of\nstream interfaces.\n\nIf unprivileged userspace requests more queues than the firmware reported\n(but no more than MAX_CS_PER_CSG), cs_slot_prog_locked() fetches an\nuninitialized stream interface and may crash when dereferencing\ncs_iface-\u003einput-\u003eringbuf_base."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T12:20:24.476Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4487cf79bf173f2b426a02d102076f8a20d23b96"
        },
        {
          "url": "https://git.kernel.org/stable/c/fdee3570b282a6c8699aea63fa5694355e010ec9"
        },
        {
          "url": "https://git.kernel.org/stable/c/9be126be5f78bc331a930295af97c9b1f9158f06"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec86c43dcfff68eab4db9bdafcd3e2b16e342e18"
        }
      ],
      "title": "drm/panthor: validate userspace queue count against initialized firmware slot count",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99003",
    "datePublished": "2026-10-23T12:20:24.476Z",
    "dateReserved": "2026-09-25T10:25:14.385Z",
    "dateUpdated": "2026-10-23T12:20:24.476Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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