{
  "cveId": "CVE-2026-43070",
  "url": "https://patchblox.com/security/cve/CVE-2026-43070",
  "summary": "CVE-2026-43070 is fixed in linux on 1 platform by DEBIAN-CVE-2026-43070 (version 6.19.11-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  bpf: Reset register ID for BPF_END value trackin...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Reset register ID for BPF_END value tracking  When a register undergoes a BPF_END (byte swap) operation, its scalar value is mutated in-place. If this register previously shared a scalar ID with another register (e.g., after an \u0060r1 = r0\u0060 assignment), this tie must be broken.  Currently, the verifier misses resetting \u0060dst_reg-\u003Eid\u0060 to 0 for BPF_END. Consequently, if a conditional jump checks the swapped register, the verifier incorrectly propagates the learned bounds to the linked register, leading to false confidence in the linked register\u0027s value and potentially allowing out-of-bounds memory accesses.  Fix this by explicitly resetting \u0060dst_reg-\u003Eid\u0060 to 0 in the BPF_END case to break the scalar tie, similar to how BPF_NEG handles it via \u0060__mark_reg_known\u0060.",
  "published": "2026-05-05T16:16:16Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00118,
  "epssPercentile": 0.01744,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.11-1",
      "fix": "DEBIAN-CVE-2026-43070",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-43070",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "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"
  }
}