NVD / CVE Program· CNA Linux

CVE-2025-38131: coresight: prevent deactivate active config while enabling the config

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: 0.20% (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 31028812724cef7bd57a51525ce58a32a6d73b22, 408c97c4a5e0b634dcd15bf8b8808b382e888164, b3b4efa2e623aecaebd7c9b9e4171f5c659e9724; azl3 kernel 6.6.92.2-2 on Azure Linux 3.0 6.6.96.1-1.

Low priority for now. Upgrade to Linux Linux 31028812724cef7bd57a51525ce58a32a6d73b22, 408c97c4a5e0b634dcd15bf8b8808b382e888164, b3b4efa2e623aecaebd7c9b9e4171f5c659e9724; azl3 kernel 6.6.92.2-2 on Azure Linux 3.0 6.6.96.1-1 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: coresight: prevent deactivate active config while enabling the config While enable active config via cscfg_csdev_enable_active_config(), active config could be deactivated via configfs' sysfs interface. This could make UAF issue in below scenario: CPU0 CPU1 (sysfs enable) load module cscfg_load_config_sets() activate config. // sysfs (sys_active_cnt == 1) ... cscfg_csdev_enable_active_config() lock(csdev->cscfg_csdev_lock) // here load config activate by CPU1 unlock(csdev->cscfg_csdev_lock) deactivate config // sysfs (sys_activec_cnt == 0) cscfg_unload_config_sets() unload module // access to config_desc which freed // while unloading module. cscfg_csdev_enable_config To address this, use cscfg_config_desc's active_cnt as a reference count which will be holded when - activate the config. - enable the activated config. and put the module reference when config_active_cnt == 0.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-09615

Published: Jul 3, 2025
Updated: Jun 17, 2026
EPSS: 0.2% · 10th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

Get told when this record changes

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No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel
debian	debian linux	cpe:2.3:o:debian:debian_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 kernel5.15 and later · before 6.1.142
linux linux kernel6.2 and later · before 6.6.94
linux linux kernel6.7 and later · before 6.12.34
linux linux kernel6.13 and later · before 6.15.3

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
- 5.15affected
- f8cce2ff3c04361b8843d8489620fda8880f668b and later · before dfe8224c9c7a43d356eb9f74b06868aa05f90223affected · git
- f8cce2ff3c04361b8843d8489620fda8880f668b and later · before b3b4efa2e623aecaebd7c9b9e4171f5c659e9724affected · git
- f8cce2ff3c04361b8843d8489620fda8880f668b and later · before 31028812724cef7bd57a51525ce58a32a6d73b22affected · git
- f8cce2ff3c04361b8843d8489620fda8880f668b and later · before ed42ee1ed05ff2f4c36938379057413a40c56680affected · git
- f8cce2ff3c04361b8843d8489620fda8880f668b and later · before 408c97c4a5e0b634dcd15bf8b8808b382e888164affected · git
- before 5.15not affected · semver
- 6.1.142 and later · up to and including 6.1.*not affected · semver
- 6.6.94 and later · up to and including 6.6.*not affected · semver
- 6.12.34 and later · up to and including 6.12.*not affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.147-1	6.1.147-1
Debian:13	linux	before 6.12.35-1	6.12.35-1

Same product

linux: all records

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Published before and after this one in the same product

← EarlierCVE-2025-38129Jul 3, 2025 · page_pool: Fix use-after-free in page_pool_recycle_in_ring
31Monitor
← EarlierCVE-2025-38130Jul 3, 2025 · drm/connector: only call HDMI audio helper plugged cb if non-null
22Monitor
Later →CVE-2025-38133Jul 3, 2025 · iio: adc: ad4851: fix ad4858 chan pointer handling
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 / package	Fixed version	Source
Linux Linux	31028812724cef7bd57a51525ce58a32a6d73b22	Vendor (CNA)
Linux Linux	408c97c4a5e0b634dcd15bf8b8808b382e888164	Vendor (CNA)
Linux Linux	b3b4efa2e623aecaebd7c9b9e4171f5c659e9724	Vendor (CNA)
Linux Linux	dfe8224c9c7a43d356eb9f74b06868aa05f90223	Vendor (CNA)
Linux Linux	ed42ee1ed05ff2f4c36938379057413a40c56680	Vendor (CNA)
azl3 kernel 6.6.92.2-2 on Azure Linux 3.0	6.6.96.1-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.147-1 · Debian:12	Package 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)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

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

Fix✗ → ✓Sep 28, 2026, 10:08 PM UTC

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

References

git.kernel.org/stable/c/31028812724cef7bd57a51525ce58a32a6d73b22

Show all references (5 more)

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

All records