{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/i915/i915_perf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "21d92025e80629fd5c25cd6751f8cf38c784dd4a",
              "status": "affected",
              "version": "0fa9349dda030fa847b36f880a5eea25c3202b66",
              "versionType": "git"
            },
            {
              "lessThan": "785b3f667b4bf98804cad135005e964df0c750de",
              "status": "affected",
              "version": "0fa9349dda030fa847b36f880a5eea25c3202b66",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/i915/i915_perf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.7",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/perf: add sentinel to xehp_oa_b_counters\n\nArrays passed to reg_in_range_table should end with empty record.\n\nThe patch solves KASAN detected bug with signature:\nBUG: KASAN: global-out-of-bounds in xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]\nRead of size 4 at addr ffffffffa1555d90 by task perf/1518\n\nCPU: 4 PID: 1518 Comm: perf Tainted: G U 6.4.0-kasan_438-g3303d06107f3+ #1\nHardware name: Intel Corporation Meteor Lake Client Platform/MTL-P DDR5 SODIMM SBS RVP, BIOS MTLPFWI1.R00.3223.D80.2305311348 05/31/2023\nCall Trace:\n\u003cTASK\u003e\n...\nxehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]\n\n(cherry picked from commit 2f42c5afb34b5696cf5fe79e744f99be9b218798)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "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 - The vulnerable code is reached only through the DRM_IOCTL_I915_PERF_ADD_CONFIG ioctl on a local i915 device/render node (/dev/dri/renderD128), requiring local system access. There is no network-facing path to i915 perf configuration.\nAC:L - A single ioctl carrying any 32-bit register address outside the two in-bounds ranges deterministically drives the sentinel-less loop past the end of the 16-byte array; no race, timing, or memory-layout luck is needed to trigger the out-of-bounds access.\nPR:L - The ioctl is DRM_RENDER_ALLOW, so no DRM master or authentication is required \u2014 only an open render node, which is group/world accessible on typical desktop, Android and container deployments. On the widely used profiling configuration dev.i915.perf_stream_paranoid=0 (the documented setting for unprivileged Intel GPU metrics collection) the perfmon_capable() check is bypassed entirely, leaving an ordinary unprivileged user able to reach the bug.\nUI:N - The attacker triggers the flaw entirely on their own by issuing the ioctl from their own process; no victim action, file open, or mount is involved.\nS:U - The out-of-bounds read and the resulting register-allowlist bypass occur within the kernel\u0027s own security authority on the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The walk reads kernel module .rodata past the object bounds with no bound other than encountering a zero pair, and the function\u0027s boolean result is returned to userspace as an accept/reject oracle, letting an attacker probe addresses and reconstruct the contents of the out-of-bounds kernel memory.\nI:H - The OOB data is interpreted as additional whitelist ranges, so registers that were never meant to be programmable are accepted and then emitted as MI_LOAD_REGISTER_IMM in a kernel-built batch executed unfiltered by the GPU command streamer, giving attacker-controlled 32-bit writes to non-whitelisted GPU MMIO and defeating the very allowlist this code enforces.\nA:H - The unterminated walk can run into unmapped module memory and oops, and it reliably panics kernels built with KASAN (the reported crash signature) or configured with kasan.fault=panic/panic_on_warn; additionally, programming out-of-allowlist GPU registers can hang or wedge the GPU for all users."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:15:21.134Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/21d92025e80629fd5c25cd6751f8cf38c784dd4a"
        },
        {
          "url": "https://git.kernel.org/stable/c/785b3f667b4bf98804cad135005e964df0c750de"
        }
      ],
      "title": "drm/i915/perf: add sentinel to xehp_oa_b_counters",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53646",
    "datePublished": "2025-10-07T15:19:44.412Z",
    "dateReserved": "2025-10-07T15:16:59.659Z",
    "dateUpdated": "2026-08-05T09:15:21.134Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}