CVE-2023-53753 (GCVE-0-2023-53753)

Vulnerability from cvelistv5 – Published: 2025-12-08 01:19 – Updated: 2026-10-15 21:41
VLAI
Title
drm/amd/display: fix mapping to non-allocated address
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix mapping to non-allocated address [Why] There is an issue mapping non-allocated location of memory. It would allocate gpio registers from an array out of bounds. [How] Patch correct numbers of bounds for using.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 21:37 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 8ce8a443ddd9002861a4ee8a7e33a0c02717422f (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 24aaf6603600d6d1159973c809ea2737664b28c4 (git)
Affected: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c , < 9190d4a263264eabf715f5fc1827da45e3fdc247 (git)
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Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 6.1.16 , ≤ 6.1.* (semver)
Unaffected: 6.2.3 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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                {
                  "lang": "en",
                  "value": "AV:L - The amdgpu/DC display stack is a local device driver; the out-of-bounds indexing is reached through driver initialization and DDC/I2C transactions driven by local DRM ioctls on /dev/dri/card* (forced connector probe \u2192 drm_get_edid \u2192 dc_submit_i2c \u2192 dal_ddc_open \u2192 define_ddc_registers). There is no network-facing path to this code.\nAC:L - On an affected DCN2/DCN3/DCN3.2 board whose VBIOS maps a DDC/OEM-I2C line to the DC_GPIO_DDCVGA_A pad, en==GPIO_DDC_LINE_DDC_VGA is produced deterministically and the \u0026ddc_shift[6]/\u0026ddc_mask[6] overread happens on every gpio open \u2014 no race, no memory-layout grooming, and the attacker can repeat connector probes at will.\nPR:L - An unprivileged local user with a normal DRM/render node handle (video/render group, granted to the active logind session on desktops and to app processes on Android) can force connector detection and EDID/I2C traffic over the affected DDC line; no CAP_SYS_ADMIN or root is required.\nUI:N - The vulnerable path is entered by the driver itself at resource-pool/link init and by any programmatic connector probe or i2c transfer; no victim action such as plugging a monitor or opening a file is needed.\nS:U - The out-of-bounds access and its effects are entirely within the kernel\u0027s own security authority (kernel .rodata read plus GPU register programming by the same driver); no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is an out-of-bounds read of 40 bytes of kernel .rodata beyond the end of ddc_shift[]/ddc_mask[] \u2014 well past a \"few bytes\" \u2014 and the leaked adjacent kernel constants are consumed as bitfield descriptors whose effect on the GPIO/I2C register state is observable to the caller performing DDC transactions.\nI:H - The out-of-bounds-derived shift and mask values are fed directly into REG_SET/REG_UPDATE read-modify-write sequences against the GPU\u0027s DDC GPIO MASK register, so arbitrary unintended bits of live hardware control registers are overwritten with values the driver never validated.\nA:H - Misprogramming the DDC/I2C pad control bits wedges display detection and I2C on that line, and the global-out-of-bounds access plus the resulting out-of-range shift counts trigger KASAN/UBSAN reports that panic the kernel under panic_on_warn, which is standard on hardened and Android builds."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:15:50.057Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/8ce8a443ddd9002861a4ee8a7e33a0c02717422f"
            },
            {
              "url": "https://git.kernel.org/stable/c/24aaf6603600d6d1159973c809ea2737664b28c4"
            },
            {
              "url": "https://git.kernel.org/stable/c/9190d4a263264eabf715f5fc1827da45e3fdc247"
            }
          ],
          "title": "drm/amd/display: fix mapping to non-allocated address",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-53753",
        "datePublished": "2025-12-08T01:19:13.743Z",
        "dateReserved": "2025-12-08T01:18:04.279Z",
        "dateUpdated": "2026-10-15T21:41:35.356Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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