CVE-2026-99003 (GCVE-0-2026-99003)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:20 – Updated: 2026-10-23 12:20
VLAI
Title
drm/panthor: validate userspace queue count against initialized firmware slot count
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7034 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: de85488138247d034eb3241840424a54d660926b , < 4487cf79bf173f2b426a02d102076f8a20d23b96 (git)
Affected: de85488138247d034eb3241840424a54d660926b , < fdee3570b282a6c8699aea63fa5694355e010ec9 (git)
Affected: de85488138247d034eb3241840424a54d660926b , < 9be126be5f78bc331a930295af97c9b1f9158f06 (git)
Affected: de85488138247d034eb3241840424a54d660926b , < ec86c43dcfff68eab4db9bdafcd3e2b16e342e18 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/panthor/panthor_sched.c"
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          "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"
      },
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    "dateReserved": "2026-09-25T10:25:14.385Z",
    "dateUpdated": "2026-10-23T12:20:24.476Z",
    "state": "PUBLISHED"
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      "percentile": "0.06127"
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      "product_status:under_investigation": "1",
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          }
        ],
        "id": "CVE-2026-99003",
        "lastModified": "2026-10-23T13:17:22.670",
        "metrics": {},
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}



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