CVE-2026-121996

{
  "etk_id": "ETK-2026-3647",
  "cve_id": "CVE-2026-121996",
  "display_id": "CVE-2026-121996",
  "ghsa_id": "GHSA-px57-gjvm-vwfx",
  "euvd_id": "EUVD-2026-117573",
  "status": "published",
  "anchor_state": "anchored",
  "title": "gdbserver agent-expression length validation flaw",
  "summary": "Red Hat Enterprise Linux 10 installations with the listed crash or GDB-related packages are affected by a length-validation error in gdbserver's agent-expression parsing. An unauthenticated network attacker may obtain uninitialized process memory and disrupt gdbserver if they can reach a running gdbserver instance.",
  "mitigation": "Restrict gdbserver access to trusted administrative networks or disable it where it is not required. Apply Red Hat updates for the affected packages when available; no fixed version is recorded in the supplied advisory data.",
  "vendor": "Red Hat",
  "product": "Red Hat Enterprise Linux 10",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "crash",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "gdb",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "gcc-toolset-14-gdb",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "gcc-toolset-15-gdb",
      "purl": null
    }
  ],
  "cwes": [
    822
  ],
  "cvss_score": 8.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 92.22745101666666,
  "t0_at": "2026-11-05T16:08:52.127000+00:00",
  "signals": {
    "check": {
      "at": "2026-11-05T17:18:00.676664+00:00",
      "days": 0.04801562111111111,
      "is_lower_bound": false,
      "measured_at": "2026-11-05T16:08:52.127000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-11-05T16:08:52.127000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-05T16:08:52.127000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-121996"
    }
  }
}