CVE-2026-103242

Full vulnerability record from the local CVENow database.
Description

A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
Severity
HIGH
CVSS score
7.1 (v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
[email protected]
Published
2026-09-30 12:17:12.653000
Last modified
2026-11-13 14:17:47.020000
View original CVE JSON
{
  "id": "CVE-2026-103242",
  "sourceIdentifier": "[email protected]",
  "published": "2026-09-30T12:17:12.653",
  "lastModified": "2026-11-13T14:17:47.020",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
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          "packageName": "rpm-main",
          "cpes": [
            "cpe:/a:redhat:hummingbird:1"
          ],
          "versions": [
            {
              "version": "6.1.0-1.4.hum1",
              "lessThan": "*",
              "versionType": "rpm",
              "status": "unaffected"
            }
          ]
        },
        {
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          "product": "Red Hat Enterprise Linux 10",
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          "packageName": "rpm",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:10"
          ]
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          "packageName": "rpm",
          "cpes": [
            "cpe:/o:redhat:rhel_els:6"
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          "product": "Red Hat Enterprise Linux 7",
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          "packageName": "rpm",
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          "defaultStatus": "unaffected",
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          "packageName": "rhoai/odh-kuberay-operator-controller-rhel9",
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          "packageName": "rhoai/odh-kube-rbac-proxy-rhel9",
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  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-09-30T16:36:10.336744Z",
          "id": "CVE-2026-103242",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:98095",
      "source": "[email protected]"
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-103242",
      "source": "[email protected]"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543866",
      "source": "[email protected]"
    }
  ]
}