CVE-2023-53112 (GCVE-0-2023-53112)

Vulnerability from cvelistv5 – Published: 2025-05-02 15:55 – Updated: 2025-05-04 07:50
VLAI?
Title
drm/i915/sseu: fix max_subslices array-index-out-of-bounds access
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/i915/sseu: fix max_subslices array-index-out-of-bounds access It seems that commit bc3c5e0809ae ("drm/i915/sseu: Don't try to store EU mask internally in UAPI format") exposed a potential out-of-bounds access, reported by UBSAN as following on a laptop with a gen 11 i915 card: UBSAN: array-index-out-of-bounds in drivers/gpu/drm/i915/gt/intel_sseu.c:65:27 index 6 is out of range for type 'u16 [6]' CPU: 2 PID: 165 Comm: systemd-udevd Not tainted 6.2.0-9-generic #9-Ubuntu Hardware name: Dell Inc. XPS 13 9300/077Y9N, BIOS 1.11.0 03/22/2022 Call Trace: <TASK> show_stack+0x4e/0x61 dump_stack_lvl+0x4a/0x6f dump_stack+0x10/0x18 ubsan_epilogue+0x9/0x3a __ubsan_handle_out_of_bounds.cold+0x42/0x47 gen11_compute_sseu_info+0x121/0x130 [i915] intel_sseu_info_init+0x15d/0x2b0 [i915] intel_gt_init_mmio+0x23/0x40 [i915] i915_driver_mmio_probe+0x129/0x400 [i915] ? intel_gt_probe_all+0x91/0x2e0 [i915] i915_driver_probe+0xe1/0x3f0 [i915] ? drm_privacy_screen_get+0x16d/0x190 [drm] ? acpi_dev_found+0x64/0x80 i915_pci_probe+0xac/0x1b0 [i915] ... According to the definition of sseu_dev_info, eu_mask->hsw is limited to a maximum of GEN_MAX_SS_PER_HSW_SLICE (6) sub-slices, but gen11_sseu_info_init() can potentially set 8 sub-slices, in the !IS_JSL_EHL(gt->i915) case. Fix this by reserving up to 8 slots for max_subslices in the eu_mask struct. (cherry picked from commit 3cba09a6ac86ea1d456909626eb2685596c07822)
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: bc3c5e0809ae9faa039baf75547e8ee46ec124ef , < 1a1682abf7399318ac074b1f2ac6a8c992b5b3da (git)
Affected: bc3c5e0809ae9faa039baf75547e8ee46ec124ef , < 36b076ab6247cf0d2135b2ad6bb337617c3b5a1b (git)
Affected: bc3c5e0809ae9faa039baf75547e8ee46ec124ef , < 193c41926d152761764894f46e23b53c00186a82 (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.21 , ≤ 6.1.* (semver)
Unaffected: 6.2.8 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/i915/gt/intel_sseu.h"
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          "vendor": "Linux",
          "versions": [
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              "version": "6.0"
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              "version": "6.2.8",
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                  "vulnerable": true
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                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/sseu: fix max_subslices array-index-out-of-bounds access\n\nIt seems that commit bc3c5e0809ae (\"drm/i915/sseu: Don\u0027t try to store EU\nmask internally in UAPI format\") exposed a potential out-of-bounds\naccess, reported by UBSAN as following on a laptop with a gen 11 i915\ncard:\n\n  UBSAN: array-index-out-of-bounds in drivers/gpu/drm/i915/gt/intel_sseu.c:65:27\n  index 6 is out of range for type \u0027u16 [6]\u0027\n  CPU: 2 PID: 165 Comm: systemd-udevd Not tainted 6.2.0-9-generic #9-Ubuntu\n  Hardware name: Dell Inc. XPS 13 9300/077Y9N, BIOS 1.11.0 03/22/2022\n  Call Trace:\n   \u003cTASK\u003e\n   show_stack+0x4e/0x61\n   dump_stack_lvl+0x4a/0x6f\n   dump_stack+0x10/0x18\n   ubsan_epilogue+0x9/0x3a\n   __ubsan_handle_out_of_bounds.cold+0x42/0x47\n   gen11_compute_sseu_info+0x121/0x130 [i915]\n   intel_sseu_info_init+0x15d/0x2b0 [i915]\n   intel_gt_init_mmio+0x23/0x40 [i915]\n   i915_driver_mmio_probe+0x129/0x400 [i915]\n   ? intel_gt_probe_all+0x91/0x2e0 [i915]\n   i915_driver_probe+0xe1/0x3f0 [i915]\n   ? drm_privacy_screen_get+0x16d/0x190 [drm]\n   ? acpi_dev_found+0x64/0x80\n   i915_pci_probe+0xac/0x1b0 [i915]\n   ...\n\nAccording to the definition of sseu_dev_info, eu_mask-\u003ehsw is limited to\na maximum of GEN_MAX_SS_PER_HSW_SLICE (6) sub-slices, but\ngen11_sseu_info_init() can potentially set 8 sub-slices, in the\n!IS_JSL_EHL(gt-\u003ei915) case.\n\nFix this by reserving up to 8 slots for max_subslices in the eu_mask\nstruct.\n\n(cherry picked from commit 3cba09a6ac86ea1d456909626eb2685596c07822)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:50:05.848Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/1a1682abf7399318ac074b1f2ac6a8c992b5b3da"
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          "url": "https://git.kernel.org/stable/c/36b076ab6247cf0d2135b2ad6bb337617c3b5a1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/193c41926d152761764894f46e23b53c00186a82"
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      ],
      "title": "drm/i915/sseu: fix max_subslices array-index-out-of-bounds access",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53112",
    "datePublished": "2025-05-02T15:55:51.733Z",
    "dateReserved": "2025-05-02T15:51:43.554Z",
    "dateUpdated": "2025-05-04T07:50:05.848Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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