CVE-2025-37813

MEDIUM EPSS 4.5%
Published May 8, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
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Published May 8, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix invalid pointer dereference in Etron workaround This check is performed before prepare_transfer() and prepare_ring(), so enqueue can already point at the final link TRB of a segment. And indeed it will, some 0.4% of times this code is called. Then enqueue + 1 is an invalid pointer. It will crash the kernel right away or load some junk which may look like a link TRB and cause the real link TRB to be replaced with a NOOP. This wouldn't end well. Use a functionally equivalent test which doesn't dereference the pointer and always gives correct result. Something has crashed my machine twice in recent days while playing with an Etron HC, and a control transfer stress test ran for confirmation has just crashed it again. The same test passes with this patch applied.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥6.6.66  –  <6.6.89
linuxlinux_kernel*≥6.11.11  –  <6.12
linuxlinux_kernel*≥6.12.2  –  <6.12.26
linuxlinux_kernel*≥6.13  –  <6.14.5
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any
linuxlinux_kernel6.15any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/0624e29c595b05e7a0e6d1c368f0a05799928e30
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/142273a49f2c315eabdbdf5a71c15e479b75ca91
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1ea050da5562af9b930d17cbbe9632d30f5df43a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bce3055b08e303e28a8751f6073066f5c33a0744
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0624e29c595b05e7a0e6d1c368f0a05799928e30
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/142273a49f2c315eabdbdf5a71c15e479b75ca91
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1ea050da5562af9b930d17cbbe9632d30f5df43a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bce3055b08e303e28a8751f6073066f5c33a0744
    Patch