FKIE_CVE-2026-35346

Vulnerability from fkie_nvd - Published: 2026-04-22 17:16 - Updated: 2026-06-17 10:40
Severity
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Summary
The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which replaces invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD). This behavior differs from GNU comm, which processes raw bytes and preserves the original input. This results in corrupted output when the utility is used to compare binary files or files using non-UTF-8 legacy encodings.
References
security@ubuntu.comhttps://github.com/uutils/coreutils/issues/10192Exploit, Issue Tracking, Vendor Advisory
security@ubuntu.comhttps://github.com/uutils/coreutils/pull/10206Issue Tracking, Patch
security@ubuntu.comhttps://github.com/uutils/coreutils/releases/tag/0.6.0Release Notes
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/uutils/coreutils/issues/10192Exploit, Issue Tracking, Vendor Advisory
Impacted products
Vendor Product Version
uutils coreutils *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/uutils",
          "defaultStatus": "unaffected",
          "packageName": "coreutils",
          "platforms": [
            "Linux",
            "Unix",
            "macOS"
          ],
          "product": "coreutils",
          "repo": "https://github.com/uutils/coreutils",
          "vendor": "Uutils",
          "versions": [
            {
              "lessThan": "0.6.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@ubuntu.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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            {
              "criteria": "cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*",
              "matchCriteriaId": "87C33018-2E08-45B0-B69C-7FC224F7F883",
              "versionEndExcluding": "0.6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which replaces invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD). This behavior differs from GNU comm, which processes raw bytes and preserves the original input. This results in corrupted output when the utility is used to compare binary files or files using non-UTF-8 legacy encodings."
    }
  ],
  "id": "CVE-2026-35346",
  "lastModified": "2026-06-17T10:40:26.057",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-22T18:12:18.337487Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-22T17:16:36.760",
  "references": [
    {
      "source": "security@ubuntu.com",
      "tags": [
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        "Issue Tracking",
        "Vendor Advisory"
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      "url": "https://github.com/uutils/coreutils/issues/10192"
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      "tags": [
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      "url": "https://github.com/uutils/coreutils/pull/10206"
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      "tags": [
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      "url": "https://github.com/uutils/coreutils/releases/tag/0.6.0"
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      "tags": [
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      "url": "https://github.com/uutils/coreutils/issues/10192"
    }
  ],
  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-176"
        }
      ],
      "source": "security@ubuntu.com",
      "type": "Secondary"
    }
  ]
}



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