CVE-2026-35233

Full vulnerability record from the local CVENow database.

Description

An unprivileged attacker can craft a user-space process with a malicious ELF binary containing an out-of-range sh_link field. When root-level dtrace attaches to -- or instruments -- that process (via dtrace -p , pid probes, or USDT), the ELF parser reads heap memory beyond the allocated section cache array without any bounds check. This results in an uninitialized/out-of-bounds heap read that can cause a NULL pointer dereference crash of the dtrace process (DoS), or -- depending on heap layout -- a read-then-use of a garbage pointer controlled by adjacent allocations, providing a foothold toward further exploitation in a privileged context.

Severity

MEDIUM

CVSS score

4.4 (v3.1)

Vulnerability status

Analyzed

Source identifier

[email protected]

Published

2026-05-01 18:16:14.647000

Last modified

2026-10-26 21:10:00.170000

View original CVE JSON

{
  "id": "CVE-2026-35233",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-01T18:16:14.647",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An unprivileged attacker can craft a user-space process with a malicious ELF binary containing an out-of-range sh_link field. When root-level dtrace attaches to -- or instruments -- that process (via dtrace -p , pid probes, or USDT), the ELF parser reads heap memory beyond the allocated section cache array without any bounds check. This results in an uninitialized/out-of-bounds heap read that can cause a NULL pointer dereference crash of the dtrace process (DoS), or -- depending on heap layout -- a read-then-use of a garbage pointer controlled by adjacent allocations, providing a foothold toward further exploitation in a privileged context."
    },
    {
      "lang": "es",
      "value": "Un atacante sin privilegios puede crear un proceso en espacio de usuario con un binario ELF malicioso que contiene un campo sh_link fuera de rango. Cuando dtrace a nivel de root se adjunta a -- o instrumenta -- ese proceso (a través de dtrace -p , sondas pid o USDT), el analizador ELF lee memoria del heap más allá del array de caché de secciones asignado sin ninguna comprobación de límites. Esto resulta en una lectura de heap no inicializada/fuera de límites que puede causar un fallo por desreferencia de puntero NULL del proceso dtrace (DoS), o -- dependiendo de la disposición del heap -- una lectura y posterior uso de un puntero basura controlado por asignaciones adyacentes, proporcionando un punto de apoyo para una explotación posterior en un contexto privilegiado."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Oracle Corporation",
          "product": "Oracle Linux",
          "versions": [
            {
              "version": "8",
              "status": "affected"
            },
            {
              "version": "9",
              "status": "affected"
            },
            {
              "version": "10",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
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        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
          "baseScore": 4.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
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          "id": "CVE-2026-35233",
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              "exploitation": "none"
            },
            {
              "automatable": "no"
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              "technicalImpact": "partial"
            }
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          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
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  "weaknesses": [
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      "type": "Secondary",
      "description": [
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          "value": "CWE-125"
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  "configurations": [
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  "references": [
    {
      "url": "https://linux.oracle.com/cve/CVE-2026-35233.html",
      "source": "[email protected]",
      "tags": [
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}