{
  "cveId": "CVE-2026-90347",
  "url": "https://patchblox.com/security/cve/CVE-2026-90347",
  "summary": "CVE-2026-90347 is fixed in 19 products on 1 platform, first by ALAS2023-2026-2143, released September 14, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "arm64: ptrace: Keep \u0027orig_x0\u0027 in-sync with x0 on syscall entry",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  arm64: ptrace: Keep \u0027orig_x0\u0027 in-sync with x0 on syscall entry  Commit e057b9477232 (\u0022arm64: syscall: Ensure saved x0 is kept in-sync with tracer updates\u0022) attempted to resolve a long-standing issue with syscall entry tracing, where a tracer is able to manipulate the first syscall argument without being subjected to seccomp or audit checking.  Unfortunately, that fix was incomplete [1], as it failed to update \u0027orig_x0\u0027 between a tracer updating x0 during a seccomp ptrace exit (SECCOMP_RET_TRACE) and the seccomp filter being re-evaluated.  Rather than add hooks to the core seccomp code, instead move the synchronisation code into the ptrace GPR and syscall setting code so that \u0027orig_x0\u0027 is kept up to date with x0 whenever we\u0027re stopped on the syscall entry path.",
  "published": "2026-09-14T09:00:00Z",
  "severity": "Important",
  "cvss": 8.4,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
  "epss": 0.00161,
  "epssPercentile": 0.05315,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90347",
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.1.186-228.374",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-90347",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90347",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90347",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90347",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.186-228.374.amzn2023",
      "fix": "ALAS2023-2026-2143",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2143",
      "released": "2026-09-14T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}