{
  "affected": [
    {
      "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: don't 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.",
  "id": "DEBIAN-CVE-2026-98132",
  "modified": "2026-09-26T04:47:30.594486195Z",
  "published": "2026-09-25T11:17:44.603Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98132"
    }
  ],
  "upstream": [
    "CVE-2026-98132"
  ]
}