CVE-2025-37813 - Etron USB XHCI Invalid Pointer Dereference Vulnerability

CVE-2025-37813 - Etron USB XHCI Invalid Pointer Dereference Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Thu, 05/08/2025 - 11:39
CVE ID : CVE-2025-37813
Published : May 8, 2025, 7:15 a.m. | 57 minutes 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.
Severity: 0.0 | NA
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