github - ghsa-jr2f-hw4r-48cj

GHSA-JR2F-HW4R-48CJ

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-13 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/sun4i: dsi: Prevent underflow when computing packet sizes

Currently, the packet overhead is subtracted using unsigned arithmetic. With a short sync pulse, this could underflow and wrap around to near the maximal u16 value. Fix this by using signed subtraction. The call to max() will correctly handle any negative numbers that are produced.

Apply the same fix to the other timings, even though those subtractions are less likely to underflow.

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50036"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-191"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:32Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sun4i: dsi: Prevent underflow when computing packet sizes\n\nCurrently, the packet overhead is subtracted using unsigned arithmetic.\nWith a short sync pulse, this could underflow and wrap around to near\nthe maximal u16 value. Fix this by using signed subtraction. The call to\nmax() will correctly handle any negative numbers that are produced.\n\nApply the same fix to the other timings, even though those subtractions\nare less likely to underflow.",
  "id": "GHSA-jr2f-hw4r-48cj",
  "modified": "2025-11-13T21:31:18Z",
  "published": "2025-06-18T12:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50036"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82a1356a933d8443139f8886f11b63c974a09a67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98e28de472ef248352f04f87e29e634ebb0ec240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb837f5b83461624e525727a8f4add14b201147e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-50036 (GCVE-0-2022-50036)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:01 – Updated: 2025-06-18 11:01

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/sun4i: dsi: Prevent underflow when computing packet sizes Currently, the packet overhead is subtracted using unsigned arithmetic. With a short sync pulse, this could underflow and wrap around to near the maximal u16 value. Fix this by using signed subtraction. The call to max() will correctly handle any negative numbers that are produced. Apply the same fix to the other timings, even though those subtractions are less likely to underflow.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a1e7908f78f5a7f53…
	https://git.kernel.org/stable/c/98e28de472ef24835…
	https://git.kernel.org/stable/c/fb837f5b83461624e…
	https://git.kernel.org/stable/c/82a1356a933d84431…

Impacted products

Vendor

Product

Version

Linux

Affected: 133add5b5ad42b7bb5fcd59d681aef6475d08600 , < a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26 (git)
Affected: 133add5b5ad42b7bb5fcd59d681aef6475d08600 , < 98e28de472ef248352f04f87e29e634ebb0ec240 (git)
Affected: 133add5b5ad42b7bb5fcd59d681aef6475d08600 , < fb837f5b83461624e525727a8f4add14b201147e (git)
Affected: 133add5b5ad42b7bb5fcd59d681aef6475d08600 , < 82a1356a933d8443139f8886f11b63c974a09a67 (git)

Linux

Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.10.138 , ≤ 5.10.* (semver)
Unaffected: 5.15.63 , ≤ 5.15.* (semver)
Unaffected: 5.19.4 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26",
              "status": "affected",
              "version": "133add5b5ad42b7bb5fcd59d681aef6475d08600",
              "versionType": "git"
            },
            {
              "lessThan": "98e28de472ef248352f04f87e29e634ebb0ec240",
              "status": "affected",
              "version": "133add5b5ad42b7bb5fcd59d681aef6475d08600",
              "versionType": "git"
            },
            {
              "lessThan": "fb837f5b83461624e525727a8f4add14b201147e",
              "status": "affected",
              "version": "133add5b5ad42b7bb5fcd59d681aef6475d08600",
              "versionType": "git"
            },
            {
              "lessThan": "82a1356a933d8443139f8886f11b63c974a09a67",
              "status": "affected",
              "version": "133add5b5ad42b7bb5fcd59d681aef6475d08600",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.138",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.63",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.138",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.63",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sun4i: dsi: Prevent underflow when computing packet sizes\n\nCurrently, the packet overhead is subtracted using unsigned arithmetic.\nWith a short sync pulse, this could underflow and wrap around to near\nthe maximal u16 value. Fix this by using signed subtraction. The call to\nmax() will correctly handle any negative numbers that are produced.\n\nApply the same fix to the other timings, even though those subtractions\nare less likely to underflow."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:01:37.844Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26"
        },
        {
          "url": "https://git.kernel.org/stable/c/98e28de472ef248352f04f87e29e634ebb0ec240"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb837f5b83461624e525727a8f4add14b201147e"
        },
        {
          "url": "https://git.kernel.org/stable/c/82a1356a933d8443139f8886f11b63c974a09a67"
        }
      ],
      "title": "drm/sun4i: dsi: Prevent underflow when computing packet sizes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50036",
    "datePublished": "2025-06-18T11:01:37.844Z",
    "dateReserved": "2025-06-18T10:57:27.396Z",
    "dateUpdated": "2025-06-18T11:01:37.844Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-JR2F-HW4R-48CJ

CVE-2022-50036 (GCVE-0-2022-50036)

Tags

Sightings

Nomenclature