{
  "cveId": "CVE-2026-72191",
  "url": "https://patchblox.com/security/cve/CVE-2026-72191",
  "summary": "CVE-2026-72191 is fixed in 56 products on 1 platform, first by DEBIAN-CVE-2026-72191, released August 15, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ntfs3: validate split-point offset in indx_inser...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ntfs3: validate split-point offset in indx_insert_into_buffer  indx_insert_into_buffer() computes      used = used1 - to_copy - sp_size;     memmove(de_t, Add2Ptr(sp, sp_size), used - le32_to_cpu(hdr1-\u003Ede_off));  where sp and sp_size come from hdr_find_split().  hdr_find_split() walks entries by le16_to_cpu(e-\u003Esize) without validating that each step stays within hdr-\u003Eused or that the size field is at least sizeof(struct NTFS_DE).  index_hdr_check(), the on-load gatekeeper, only validates header-level fields (used, total, de_off) and does not walk per-entry sizes.  A crafted NTFS image whose leaf INDEX_HDR reports used == total but contains one interior NTFS_DE with size = 0xFFF0 therefore passes validation, descends to indx_insert_into_buffer() through the ntfs_create() -\u003E indx_insert_entry() path, and makes hdr_find_split() return an sp whose sp_size (0xFFF0) greatly exceeds the remaining bytes in the buffer.  The u32 subtraction underflows and the memmove count becomes a near-4-GiB value, producing an out-of-bounds kernel write that corrupts adjacent allocations and panics the kernel.  Reproduced on 7.0.0-rc7 with UML \u002B KASAN via a crafted image and a single \u0027touch\u0027 inside the mounted directory; crash site resolves to fs/ntfs3/index.c at the memmove.  Trigger requires only local mount of an attacker-supplied filesystem image (USB, loopback, or removable media auto-mount).  Reject the split whenever the chosen sp plus its declared size already extends past hdr1-\u003Eused.  This is the minimal fix; it preserves the existing hdr_find_split() contract and relies on the same out: cleanup path as the pre-existing error returns.  A prior OOB read in the very same indx_insert_into_buffer() memmove was fixed in commit b8c44949044e (\u0022fs/ntfs3: Fix OOB read in indx_insert_into_buffer\u0022) by tightening hdr_find_e(), but that fix does not cover the split-point size field path addressed here: sp is returned by hdr_find_split(), not hdr_find_e(), and the underflow is driven by sp-\u003Esize rather than hdr-\u003Eused exceeding hdr-\u003Etotal.",
  "published": "2026-08-15T06:21:37Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00697,
  "epssPercentile": 0.53308,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "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": "bpftool6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "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-livepatch-6.12.100-125.179",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.41-94.142",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "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": "kernel6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.12-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.187-1",
      "fix": "DEBIAN-CVE-2026-72191",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72191",
      "released": "2026-08-15T22:38:55Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.100-1",
      "fix": "DEBIAN-CVE-2026-72191",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72191",
      "released": "2026-08-15T22:38:55Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-72191",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72191",
      "released": "2026-08-15T22:38:55Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "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": "perf6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "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"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.100-125.179.amzn2023",
      "fix": "ALAS2023-2026-2057",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2057",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.41-94.142.amzn2023",
      "fix": "ALAS2023-2026-2071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}