CVE-2026-93263 (GCVE-0-2026-93263)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:52 – Updated: 2026-09-24 15:52
VLAI
Title
clk: eswin: Zero-initialize stack-allocated clk_init_data
Summary
In the Linux kernel, the following vulnerability has been resolved: clk: eswin: Zero-initialize stack-allocated clk_init_data eswin_clk_register_pll() and eswin_register_clkdiv() declare a struct clk_init_data on the stack and only initialize some of its fields (parent_data respectively parent_hws). clk_core_populate_parent_map() checks parent_names first and parent_data second before falling back to parent_hws, so leftover stack garbage in the uninitialized fields hijacks parent resolution and the clk core dereferences a bogus pointer: Unable to handle kernel NULL pointer dereference at virtual address 000000000000000c Oops [#1] epc : __clk_register+0x31a/0x7f0 [<ffffffff805dc774>] __clk_register+0x31a/0x7f0 [<ffffffff805dcd76>] devm_clk_hw_register+0x2a/0x94 [<ffffffff805e319a>] eswin_register_clkdiv+0x80/0xd0 [<ffffffff805e34a0>] eswin_clk_register_clks+0x162/0x1a0 [<ffffffff805e3736>] eic7700_clk_probe+0x146/0x180 [<ffffffff8065d23c>] platform_probe+0x3c/0x7a Observed on EIC7700 hardware (with the driver backported to a 6.17 tree); whether the bug triggers depends entirely on what the stack happens to contain when the registration helpers run. Zero-initialize both structures.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cd44f127c1d42833a32ba0a0965255ee6184f8c1 , < 1183dc2450a268a536a15da8b106ec520cdbd19f (git)
Affected: cd44f127c1d42833a32ba0a0965255ee6184f8c1 , < 011d8de504bc84402aabc1dda1cf0552fe9a5af2 (git)
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Linux Linux Affected: 7.1
Unaffected: 0 , < 7.1 (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/clk/eswin/clk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1183dc2450a268a536a15da8b106ec520cdbd19f",
              "status": "affected",
              "version": "cd44f127c1d42833a32ba0a0965255ee6184f8c1",
              "versionType": "git"
            },
            {
              "lessThan": "011d8de504bc84402aabc1dda1cf0552fe9a5af2",
              "status": "affected",
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              "versionType": "git"
            }
          ]
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          "product": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "7.1",
                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: eswin: Zero-initialize stack-allocated clk_init_data\n\neswin_clk_register_pll() and eswin_register_clkdiv() declare a struct\nclk_init_data on the stack and only initialize some of its fields\n(parent_data respectively parent_hws). clk_core_populate_parent_map()\nchecks parent_names first and parent_data second before falling back\nto parent_hws, so leftover stack garbage in the uninitialized fields\nhijacks parent resolution and the clk core dereferences a bogus\npointer:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 000000000000000c\n  Oops [#1]\n  epc : __clk_register+0x31a/0x7f0\n  [\u003cffffffff805dc774\u003e] __clk_register+0x31a/0x7f0\n  [\u003cffffffff805dcd76\u003e] devm_clk_hw_register+0x2a/0x94\n  [\u003cffffffff805e319a\u003e] eswin_register_clkdiv+0x80/0xd0\n  [\u003cffffffff805e34a0\u003e] eswin_clk_register_clks+0x162/0x1a0\n  [\u003cffffffff805e3736\u003e] eic7700_clk_probe+0x146/0x180\n  [\u003cffffffff8065d23c\u003e] platform_probe+0x3c/0x7a\n\nObserved on EIC7700 hardware (with the driver backported to a 6.17\ntree); whether the bug triggers depends entirely on what the stack\nhappens to contain when the registration helpers run.\n\nZero-initialize both structures."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-24T15:52:02.877Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1183dc2450a268a536a15da8b106ec520cdbd19f"
        },
        {
          "url": "https://git.kernel.org/stable/c/011d8de504bc84402aabc1dda1cf0552fe9a5af2"
        }
      ],
      "title": "clk: eswin: Zero-initialize stack-allocated clk_init_data",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93263",
    "datePublished": "2026-09-24T15:52:02.877Z",
    "dateReserved": "2026-09-17T16:02:15.097Z",
    "dateUpdated": "2026-09-24T15:52:02.877Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-93263",
      "date": "2026-09-25",
      "epss": "0.00176",
      "percentile": "0.06408"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/clk/eswin/clk.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "1183dc2450a268a536a15da8b106ec520cdbd19f",
                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "011d8de504bc84402aabc1dda1cf0552fe9a5af2",
                    "status": "affected",
                    "version": "cd44f127c1d42833a32ba0a0965255ee6184f8c1",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/clk/eswin/clk.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "7.1"
                  },
                  {
                    "lessThan": "7.1",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.6",
                    "versionType": "semver"
                  },
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                    "status": "unaffected",
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                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: eswin: Zero-initialize stack-allocated clk_init_data\n\neswin_clk_register_pll() and eswin_register_clkdiv() declare a struct\nclk_init_data on the stack and only initialize some of its fields\n(parent_data respectively parent_hws). clk_core_populate_parent_map()\nchecks parent_names first and parent_data second before falling back\nto parent_hws, so leftover stack garbage in the uninitialized fields\nhijacks parent resolution and the clk core dereferences a bogus\npointer:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 000000000000000c\n  Oops [#1]\n  epc : __clk_register+0x31a/0x7f0\n  [\u003cffffffff805dc774\u003e] __clk_register+0x31a/0x7f0\n  [\u003cffffffff805dcd76\u003e] devm_clk_hw_register+0x2a/0x94\n  [\u003cffffffff805e319a\u003e] eswin_register_clkdiv+0x80/0xd0\n  [\u003cffffffff805e34a0\u003e] eswin_clk_register_clks+0x162/0x1a0\n  [\u003cffffffff805e3736\u003e] eic7700_clk_probe+0x146/0x180\n  [\u003cffffffff8065d23c\u003e] platform_probe+0x3c/0x7a\n\nObserved on EIC7700 hardware (with the driver backported to a 6.17\ntree); whether the bug triggers depends entirely on what the stack\nhappens to contain when the registration helpers run.\n\nZero-initialize both structures."
          }
        ],
        "id": "CVE-2026-93263",
        "lastModified": "2026-09-24T16:17:23.067",
        "metrics": {},
        "published": "2026-09-24T16:17:23.067",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/011d8de504bc84402aabc1dda1cf0552fe9a5af2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1183dc2450a268a536a15da8b106ec520cdbd19f"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • 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.



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