CVE-2026-72310 (GCVE-0-2026-72310)
Vulnerability from cvelistv5
Published
2026-08-15 05:55
Modified
2026-10-16 18:55
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix overflow in passthrough ioctl bounds check smb2_ioctl_query_info() validates the PASSTHRU_FSCTL response payload before copying it to userspace. The payload offset and length both come from 32-bit fields. The bounds check currently adds OutputOffset and qi.input_buffer_length directly, so the addition can wrap in 32-bit arithmetic before the result is compared against the response buffer length. A malicious server can use a large OutputOffset and a small OutputCount to make the wrapped sum pass the bounds check. The later copy_to_user() then reads from io_rsp + OutputOffset, outside the response buffer. Use size_add() for the offset plus length check so overflow is treated as out of bounds.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2b1116bbe898aefdf584838448c6869f69851e0f
Version: 2005c32ec99ee2490e8131b3953f3f212009ffea
Version: 5.4.69   ≤
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Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.