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CVE-2026-72352 (GCVE-0-2026-72352)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:43
VLAI
Title
HID: bpf: Fix hid_bpf_get_data() range check
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: bpf: Fix hid_bpf_get_data() range check hid_bpf_get_data() returns a pointer into the HID-BPF context data when the caller-provided offset and size fit inside ctx->allocated_size. The current check adds rdwr_buf_size and offset before comparing the result against ctx->allocated_size. Since both values are unsigned, a very large size can wrap the sum below ctx->allocated_size and make the helper return a pointer even though the requested range is not contained in the backing buffer. Use check_add_overflow() to reject wrapped range ends before comparing the requested range end against ctx->allocated_size.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 658ee5a64fcfbbf758447fa3af425729eaabb0dc , < ca373549140dfb386aa2de38364b58441b1f4885 (git)
Affected: 658ee5a64fcfbbf758447fa3af425729eaabb0dc , < 61a959b82f1aecd6d2d35c208013dd077cac9d10 (git)
Affected: 658ee5a64fcfbbf758447fa3af425729eaabb0dc , < f81bc5a709dcbaf2a3bbef4ca7167f93900cc39f (git)
Affected: 658ee5a64fcfbbf758447fa3af425729eaabb0dc , < 2d044049421dd48212b28646a850749d4a2d57fa (git)
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Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/hid/bpf/hid_bpf_dispatch.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: bpf: Fix hid_bpf_get_data() range check\n\nhid_bpf_get_data() returns a pointer into the HID-BPF context data when\nthe caller-provided offset and size fit inside ctx-\u003eallocated_size.\n\nThe current check adds rdwr_buf_size and offset before comparing the\nresult against ctx-\u003eallocated_size. Since both values are unsigned, a\nvery large size can wrap the sum below ctx-\u003eallocated_size and make the\nhelper return a pointer even though the requested range is not contained\nin the backing buffer.\n\nUse check_add_overflow() to reject wrapped range ends before comparing\nthe requested range end against ctx-\u003eallocated_size."
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              "value": "AV:L - The flaw is only reachable through local bpf() syscalls that load BPF_PROG_TYPE_STRUCT_OPS HID-BPF programs and attach them via BPF_LINK_CREATE; per kernel CNA guidance BPF subsystem bugs are Local even though callbacks may later run on HID input.\nAC:L - Once a HID-BPF program is loaded, the attacker fully controls offset and rdwr_buf_size passed to hid_bpf_get_data(); values such as offset=2 with size=~0 reliably wrap the unsigned sum and bypass the check without races or uncontrollable memory layout.\nPR:L - Loading BPF_MAP_TYPE_STRUCT_OPS maps and BPF_PROG_TYPE_STRUCT_OPS programs requires CAP_BPF (sysctl_unprivileged_bpf_disabled blocks unprivileged BPF); per kernel CNA guidance this is Low because CAP_BPF can be delegated via BPF tokens into user namespaces, not only init-namespace root.\nUI:N - The attacker loads and attaches their own HID-BPF program and triggers hid_bpf_get_data() from its callbacks; no separate victim action such as mounting, opening a file, or plugging in a device is required beyond the attacker\u0027s own bpf operations.\nS:U - Exploitation corrupts kernel heap memory from within the same kernel security authority to achieve local privilege escalation; it does not inherently cross VM, IOMMU, or container sandbox boundaries as a distinct scope change.\nC:H - The overflow lets BPF code obtain a pointer outside the allocated HID-BPF context buffer and read adjacent kernel heap memory, enabling arbitrary kernel information disclosure and supporting further exploitation primitives.\nI:H - The same out-of-bounds pointer allows arbitrary kernel heap writes through the returned buffer, enabling control of adjacent objects and potential arbitrary code execution in kernel context.\nA:H - Large out-of-bounds reads/writes against kmalloc-backed HID-BPF buffers can corrupt critical kernel structures and cause kernel oops, panic, or hang during HID-BPF callback execution."
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    "datePublished": "2026-08-15T05:55:54.809Z",
    "dateReserved": "2026-08-09T03:40:39.921Z",
    "dateUpdated": "2026-08-17T05:43:09.954Z",
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    "redhat_vex": {
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      "cve": "CVE-2026-72352",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: HID: bpf: Fix hid_bpf_get_data() range check",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.