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NVD / CVE Program· CNA Linux

CVE-2025-37836: PCI: Fix reference leak in pci_register_host_bridge()

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.31% (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 3297497ad2246eb9243849bfbbc57a0dea97d76e, 804443c1f27883926de94c849d91f5b7d7d696e9, 9707d0c932f41006a2701afc926b232b50e356b4; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1.

Low priority for now. Upgrade to Linux Linux 3297497ad2246eb9243849bfbbc57a0dea97d76e, 804443c1f27883926de94c849d91f5b7d7d696e9, 9707d0c932f41006a2701afc926b232b50e356b4; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1 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: PCI: Fix reference leak in pci_register_host_bridge() If device_register() fails, call put_device() to give up the reference to avoid a memory leak, per the comment at device_register(). Found by code review. [bhelgaas: squash Dan Carpenter's double free fix from https://lore.kernel.org/r/db806a6c-a91b-4e5a-a84b-6b7e01bdac85@stanley.mountain]

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 9, 2025
Updated
Nov 5, 2026
EPSS
0.3% · 24th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-37836

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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 5.15.181
  • linux linux kernel5.16 and later · before 6.1.136
  • linux linux kernel6.2 and later · before 6.6.89
  • linux linux kernel4.10 and later · before 5.10.237
  • linux linux kernel6.13 and later · before 6.13.12
  • linux linux kernel6.14 and later · before 6.14.3
  • linux linux kernel6.7 and later · before 6.12.24

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

    • 4.10affected
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before f4db1b2c9ae3d013733c302ee70cac943b7070c0affected · git
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before 3297497ad2246eb9243849bfbbc57a0dea97d76eaffected · git
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before b783478e0c53ffb4f04f25fb4e21ef7f482b05dfaffected · git
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before bd2a352a0d72575f1842d28c14c10089f0cfe1aeaffected · git
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before 9707d0c932f41006a2701afc926b232b50e356b4affected · git
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before bbba4c50a2d2a1d3f3bf31cc4b8280cb492bf2c7affected · git
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before f9208aec86226524ec1cb68a09ac70e974ea6536affected · git
    • 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 and later · before 804443c1f27883926de94c849d91f5b7d7d696e9affected · git
    • before 4.10not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.137-16.1.137-1
Debian:13linuxbefore 6.12.25-16.12.25-1

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-2025-37886May 9, 2025 · pds_core: make wait_context part of q_info
    22Monitor
  • ← EarlierCVE-2025-37887May 9, 2025 · pds_core: handle unsupported PDS_CORE_CMD_FW_CONTROL result
    22Monitor
  • Later →CVE-2025-37837May 9, 2025 · iommu/tegra241-cmdqv: Fix warnings due to dmam_free_coherent()
    22Monitor

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 Linux3297497ad2246eb9243849bfbbc57a0dea97d76eVendor (CNA)
Linux Linux804443c1f27883926de94c849d91f5b7d7d696e9Vendor (CNA)
Linux Linux9707d0c932f41006a2701afc926b232b50e356b4Vendor (CNA)
Linux Linuxb783478e0c53ffb4f04f25fb4e21ef7f482b05dfVendor (CNA)
Linux Linuxbbba4c50a2d2a1d3f3bf31cc4b8280cb492bf2c7Vendor (CNA)
Linux Linuxbd2a352a0d72575f1842d28c14c10089f0cfe1aeVendor (CNA)
Linux Linuxf4db1b2c9ae3d013733c302ee70cac943b7070c0Vendor (CNA)
Linux Linuxf9208aec86226524ec1cb68a09ac70e974ea6536Vendor (CNA)
azl3 kernel 6.6.85.1-4 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.92.2-1 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.137-1 · 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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (9 more)

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

All records