{
  "cveId": "CVE-2026-98034",
  "url": "https://patchblox.com/security/cve/CVE-2026-98034",
  "summary": "CVE-2026-98034 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-98034, released October 2, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "bpf: Mark NULL kptr stores precise",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Mark NULL kptr stores precise  check_map_kptr_access() permits a scalar store into an untrusted kptr field only when the register is known to contain zero. Unlike other verifier checks whose outcome depends on a scalar value, it does not mark that register precise.  A state checkpoint reached with an imprecise zero can therefore prune a second path that reaches the store with an arbitrary nonzero scalar. The program can write attacker-controlled bits into the kptr field and load them back as a PTR_TO_BTF_ID.  Call mark_chain_precision() before accepting a known-zero register. This forces state equivalence to compare its scalar range and makes the verifier visit and reject a path carrying a nonzero value.",
  "published": "2026-09-25T11:17:32Z",
  "severity": "Moderate",
  "cvss": 7.1,
  "epss": 0.00201,
  "epssPercentile": 0.09995,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98034",
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      "fixedVersion": "1:6.12.113-138.209.amzn2023",
      "fix": "ALAS2023-2026-3335",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335",
      "released": "2026-11-07T01:06:52Z"
    },
    {
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      "product": "python3-perf6.18",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-3251",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3251",
      "released": "2026-11-07T01:06:52Z"
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    {
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      "fix": "ALAS2023-2026-3251",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3251",
      "released": "2026-11-07T01:06:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}