{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max  check_kfunc_args() detects a kfunc argument named rdonly_buf_size or rdwr_buf_size and stores reg-\u003evar_off.value into meta-\u003er0_size, a u64, and does not bound it. check_kfunc_call() later copies that value into the returned register's mem_size field:    meta-\u003er0_size = reg-\u003evar_off.value;   ...   regs[BPF_REG_0].mem_size = meta.r0_size;  regs[BPF_REG_0].mem_size is u32. A constant whose upper 32 bits are set gets truncated instead of causing a load-time rejection, so the verifier records a PTR_TO_MEM register with an approximately 4 GiB mem_size for whatever allocation the kfunc returned. A later access check against that register uses the truncated, wrong bound.  Reject rdonly_buf_size/rdwr_buf_size values that exceed U32_MAX at the point meta-\u003er0_size is set.",
  "id": "DEBIAN-CVE-2026-93125",
  "modified": "2026-09-18T04:47:30.408597708Z",
  "published": "2026-09-17T17:18:07.247Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-93125"
    }
  ],
  "upstream": [
    "CVE-2026-93125"
  ]
}