Vulnerability-Lookup

CVE-2023-53646 (GCVE-0-2023-53646)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:19 – Updated: 2026-08-05 09:15

Title

drm/i915/perf: add sentinel to xehp_oa_b_counters

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/i915/perf: add sentinel to xehp_oa_b_counters Arrays passed to reg_in_range_table should end with empty record. The patch solves KASAN detected bug with signature: BUG: KASAN: global-out-of-bounds in xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915] Read of size 4 at addr ffffffffa1555d90 by task perf/1518 CPU: 4 PID: 1518 Comm: perf Tainted: G U 6.4.0-kasan_438-g3303d06107f3+ #1 Hardware name: Intel Corporation Meteor Lake Client Platform/MTL-P DDR5 SODIMM SBS RVP, BIOS MTLPFWI1.R00.3223.D80.2305311348 05/31/2023 Call Trace: <TASK> ... xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915] (cherry picked from commit 2f42c5afb34b5696cf5fe79e744f99be9b218798)

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/21d92025e80629fd5…
https://git.kernel.org/stable/c/785b3f667b4bf9880…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 0fa9349dda030fa847b36f880a5eea25c3202b66 , < 21d92025e80629fd5c25cd6751f8cf38c784dd4a (git) Affected: 0fa9349dda030fa847b36f880a5eea25c3202b66 , < 785b3f667b4bf98804cad135005e964df0c750de (git)	guessed
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.4.7 , ≤ 6.4.* (semver) Unaffected: 6.5 , ≤ * (original_commit_for_fix)	guessed

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/i915/i915_perf.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "785b3f667b4bf98804cad135005e964df0c750de",
              "status": "affected",
              "version": "0fa9349dda030fa847b36f880a5eea25c3202b66",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
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          "vendor": "Linux",
          "versions": [
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            },
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              "status": "unaffected",
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              "versionType": "semver"
            },
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              "status": "unaffected",
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            }
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      "cpeApplicability": [
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            {
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                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
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      "descriptions": [
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          "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)"
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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 - 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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53646",
      "date": "2026-09-14",
      "epss": "0.00196",
      "percentile": "0.09489"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:16:21+00:00",
      "cve": "CVE-2023-53646",
      "id": "CVE-2023-53646",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "399",
      "product_status:known_affected": "38",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/i915/perf: add sentinel to xehp_oa_b_counters",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53646.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-07T16:45:01Z",
      "cve": "CVE-2023-53646",
      "id": "CVE-2023-53646",
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      "product_status:known_affected": "394",
      "product_status:known_not_affected": "393",
      "product_status:recommended": "359",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53646",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53646.json",
      "version": "42"
    }
  }
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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CVE-2023-53646 (GCVE-0-2023-53646)

Tags

Sightings

Nomenclature