{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Reject negative const offsets for buffer pointers  The verifier rejects variable offsets for PTR_TO_TP_BUFFER and PTR_TO_BUF accesses, but it currently accepts a constant negative offset produced by pointer arithmetic.  Commit 022ac0750883 (\"bpf: use reg-\u003evar_off instead of reg-\u003eoff for pointers\") moved constant pointer offsets from reg-\u003eoff to reg-\u003evar_off. However, __check_buffer_access() continued to check only the instruction offset. An access with reg-\u003evar_off equal to -8 and an instruction offset of zero therefore passes verification.  For writable raw tracepoints, the access end is also calculated from the unsigned reg-\u003evar_off.value. An eight-byte access starting at -8 wraps the calculated end to zero, allowing the program to load and attach without increasing max_tp_access.  After ensuring that reg-\u003evar_off is constant, calculate the effective access start using signed arithmetic and reject it when it is negative. Use the validated start to calculate the access end for both PTR_TO_TP_BUFFER and PTR_TO_BUF.",
  "id": "DEBIAN-CVE-2026-68462",
  "modified": "2026-09-14T16:47:41.079266499Z",
  "published": "2026-08-15T06:18:39.803Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-68462"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-68462"
  ]
}