{
  "cveId": "CVE-2026-80626",
  "url": "https://patchblox.com/security/cve/CVE-2026-80626",
  "summary": "CVE-2026-80626 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-80626, released August 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  powerpc/perf: fix preempt count underflow in fsl...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del  fsl_emb_pmu_del() unconditionally calls put_cpu_var(cpu_hw_events) at the \u0027out:\u0027 label, but only calls the matching get_cpu_var() after the \u0027i \u003C 0\u0027 early-return check. When event-\u003Ehw.idx is negative the function jumps to \u0027out:\u0027 without having taken get_cpu_var(), and the trailing put_cpu_var() then issues an unmatched preempt_enable(), underflowing preempt_count.  On a CONFIG_PREEMPT=y kernel preempt_count would underflow and eventually present as a \u0027scheduling while atomic\u0027 BUG.  Move put_cpu_var() to pair with get_cpu_var() so the percpu access is correctly bracketed and the \u0027out:\u0027 label only handles perf_pmu_enable.",
  "published": "2026-08-28T08:16:46Z",
  "severity": "",
  "epss": 0.0022,
  "epssPercentile": 0.12547,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.180-1",
      "fix": "DEBIAN-CVE-2026-80626",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80626",
      "released": "2026-08-29T00:46:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.100-1",
      "fix": "DEBIAN-CVE-2026-80626",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80626",
      "released": "2026-08-29T00:46:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-80626",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80626",
      "released": "2026-08-29T00:46:20Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T07:50:38Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}