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NVD / CVE Program· CNA Linux

CVE-2025-38535: phy: tegra: xusb: Fix unbalanced regulator disable in UTMI PHY mode

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1bb85b5c2bd43b687c3d54eb6328917f90dd38fc, 5367cdeb75cb6c687ca468450bceb2602ab239d8, cdcb0ffd6448f6be898956913a42bd08e59fb2ae.

Low priority for now. Upgrade to Linux Linux 1bb85b5c2bd43b687c3d54eb6328917f90dd38fc, 5367cdeb75cb6c687ca468450bceb2602ab239d8, cdcb0ffd6448f6be898956913a42bd08e59fb2ae or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: phy: tegra: xusb: Fix unbalanced regulator disable in UTMI PHY mode When transitioning from USB_ROLE_DEVICE to USB_ROLE_NONE, the code assumed that the regulator should be disabled. However, if the regulator is marked as always-on, regulator_is_enabled() continues to return true, leading to an incorrect attempt to disable a regulator which is not enabled. This can result in warnings such as: [ 250.155624] WARNING: CPU: 1 PID: 7326 at drivers/regulator/core.c:3004 _regulator_disable+0xe4/0x1a0 [ 250.155652] unbalanced disables for VIN_SYS_5V0 To fix this, we move the regulator control logic into tegra186_xusb_padctl_id_override() function since it's directly related to the ID override state. The regulator is now only disabled when the role transitions from USB_ROLE_HOST to USB_ROLE_NONE, by checking the VBUS_ID register. This ensures that regulator enable/disable operations are properly balanced and only occur when actually transitioning to/from host mode.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 16, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • linux linux kernel5.11 and later · before 5.15.190
  • linux linux kernel5.16 and later · before 6.1.147
  • linux linux kernel6.2 and later · before 6.6.100
  • linux linux kernel5.7 and later · before 5.10.241
  • linux linux kernel6.13 and later · before 6.15.8
  • linux linux kernel6.7 and later · before 6.12.40
  • linux linux kernel6.16

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.7affected
    • 49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 and later · before ceb645ac6ce052609ee5c8f819a80e8881789b04affected · git
    • 49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 and later · before cdcb0ffd6448f6be898956913a42bd08e59fb2aeaffected · git
    • 49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 and later · before 1bb85b5c2bd43b687c3d54eb6328917f90dd38fcaffected · git
    • 49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 and later · before 5367cdeb75cb6c687ca468450bceb2602ab239d8affected · git
    • 49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 and later · before ec7f98ff05f0649af0adeb4808c7ba23d6111ef9affected · git
    • 49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 and later · before eaa420339658615d26c1cc95cd6cf720b9aebfcaaffected · git
    • 49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 and later · before cefc1caee9dd06c69e2d807edc5949b329f52b22affected · git
    • before 5.7not affected · semver
    • 5.10.241 and later · up to and including 5.10.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.147-16.1.147-1
Debian:13linuxbefore 6.12.41-16.12.41-1
Debian:14linuxbefore 6.16.3-16.16.3-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-38533Aug 16, 2025 · net: libwx: fix the using of Rx buffer DMA
    31Monitor
  • ← EarlierCVE-2025-38534Aug 16, 2025 · netfs: Fix copy-to-cache so that it performs collection with ceph+fscache
    22Monitor
  • Later →CVE-2025-38536Aug 16, 2025 · net: airoha: fix potential use-after-free in airoha_npu_get()
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux1bb85b5c2bd43b687c3d54eb6328917f90dd38fcVendor (CNA)
Linux Linux5367cdeb75cb6c687ca468450bceb2602ab239d8Vendor (CNA)
Linux Linuxcdcb0ffd6448f6be898956913a42bd08e59fb2aeVendor (CNA)
Linux Linuxceb645ac6ce052609ee5c8f819a80e8881789b04Vendor (CNA)
Linux Linuxcefc1caee9dd06c69e2d807edc5949b329f52b22Vendor (CNA)
Linux Linuxeaa420339658615d26c1cc95cd6cf720b9aebfcaVendor (CNA)
Linux Linuxec7f98ff05f0649af0adeb4808c7ba23d6111ef9Vendor (CNA)
debian:linux6.1.147-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records