NULL Pointer Dereference Affecting kernel-syms package, versions <6.4.0-150700.53.6.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.02% (4th percentile)

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  • Snyk IDSNYK-SLES157-KERNELSYMS-10747184
  • published15 Jul 2025
  • disclosed14 Jul 2025

Introduced: 14 Jul 2025

CVE-2025-37813  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-syms to version 6.4.0-150700.53.6.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-syms package and not the kernel-syms package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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 Base Scores

version 3.1