{
  "cveId": "CVE-2026-98132",
  "url": "https://patchblox.com/security/cve/CVE-2026-98132",
  "summary": "CVE-2026-98132 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98132 (version 7.2.7-1), released October 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  bpf: don\u0027t downgrade half-dead scalar zero spill...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: don\u0027t downgrade half-dead scalar zero spills to STACK_ZERO  states.c:__clean_func_state() can downgrade scalar zero spill to STACK_ZERO in the following case:    *(u64 *)(r10 - 8) = 0;   ... checkpoint ...   r1 = *(u32 *)(r10 - 4);   ... no reads from r10-8 ...  Here 4 bytes at r10-8 are dead and verifier changes scalar spill to a combination: 0000pppp (p stands for poison). Such a change breaks precision propagation chains. All places that produce STACK_ZERO should call bpf_mark_chain_precision() for the zero source.  This patch fixes the bug in a simplest way possible: avoids converting stack spills of zero to STACK_ZERO. Two smarter approaches are possible: - do bpf_mark_chain_precision() from __clean_func_state() - check slot liveness information in check_stack_write_fixed_off()  I investigated both and the changes required are a bit tricky, hence go with a simple fix for the time being.",
  "published": "2026-09-25T11:17:44Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00108,
  "epssPercentile": 0.01182,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.7-1",
      "fix": "DEBIAN-CVE-2026-98132",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98132",
      "released": "2026-10-02T21:04:56Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}