🛡️ AZL-70159 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2025-37882 affecting package kernel 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved:

usb: xhci: Fix isochronous Ring Underrun/Overrun event handling

The TRB pointer of these events points at enqueue at the time of error

occurrence on xHCI 1.1+ HCs or it's NULL on older ones. By the time we

are handling the event, a new TD may be queued at this ring position.

I can trigger this race by rising interrupt moderation to increase IRQ

handling delay. Similar delay may occur naturally due to system load.

If this ever happens after a Missed Service Error, missed TDs will be

skipped and the new TD processed as if it matched the event. It could

be given back prematurely, risking data loss or buffer UAF by the xHC.

Don't complete TDs on xrun events and don't warn if queued TDs don't

match the event's TRB pointer, which can be NULL or a link/no-op TRB.

Don't warn if there are no queued TDs at all.

Now that it's safe, also handle xrun events if the skip flag is clear.

This ensures completion of any TD stuck in 'error mid TD' state right

before the xrun event, which could happen if a driver submits a finite

number of URBs to a buggy HC and then an error occurs on the last TD.

Affected software

AZL-70159 is recorded against 1 package.

  • kernel

Timeline and source

Published on 9 May 2025 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-05-09
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — —

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