usb: xhci: Fix invalid pointer dereference in Etron workaround (CVE-2025-37813) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2025-37813

usb: xhci: Fix invalid pointer dereference in Etron workaround

Answer in brief

CVE-2025-37813 records a Unknown severity vulnerability in usb: xhci: Fix invalid pointer dereference in Etron workaround. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 8, 2025Updated Aug 5, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=fbc0a0c7718a6cb1dc5e0811a4f88a2b1deedfa1 <142273a49f2c315eabdbdf5a71c15e479b75ca91 \|\| >=9258c9ed32294ce3a4b58c9d92fc49ba030d35c9 <bce3055b08e303e28a8751f6073066f5c33a0744 \|\| >=5e1c67abc9301d05130b7e267c204e7005503b33 <0624e29c595b05e7a0e6d1c368f0a05799928e30 \|\| >=5e1c67abc9301d05130b7e267c204e7005503b33 <1ea050da5562af9b930d17cbbe9632d30f5df43a \|\| 4725344ca645a98a9d8e45e25b01a2244de5b8aa \|\| >=6.6.66 <6.6.89 \|\| >=6.12.2 <6.12.26 \|\| >=6.11.11 <6.12	142273a49f2c315eabdbdf5a71c15e479b75ca91, bce3055b08e303e28a8751f6073066f5c33a0744, 0624e29c595b05e7a0e6d1c368f0a05799928e30, 1ea050da5562af9b930d17cbbe9632d30f5df43a, 6.6.89, 6.12.26, 6.12
Linux/Linuxgeneric	6.13	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 142273a49f2c315eabdbdf5a71c15e479b75ca91 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
May 8, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.