NVD / CVE Program· CNA Linux

CVE-2025-37796: wifi: at76c50x: fix use after free access in at76_disconnect

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 152721cbae42713ecfbca6847e0f102ee6b19546, 27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da, 3c619aec1f538333b56746d2f796aab1bca5c9a5; 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 152721cbae42713ecfbca6847e0f102ee6b19546, 27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da, 3c619aec1f538333b56746d2f796aab1bca5c9a5; 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: wifi: at76c50x: fix use after free access in at76_disconnect The memory pointed to by priv is freed at the end of at76_delete_device function (using ieee80211_free_hw). But the code then accesses the udev field of the freed object to put the USB device. This may also lead to a memory leak of the usb device. Fix this by using udev from interface.

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2025-12108

Published: May 1, 2025
Updated: Jun 17, 2026
EPSS: 0.2% · 9th percentile
CWE: CWE-416

Report tools

JSON

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

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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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

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

linux linux kernel3.17.1 and later · before 5.4.293
linux linux kernel5.5 and later · before 5.10.237
linux linux kernel5.11 and later · before 5.15.181
linux linux kernel5.16 and later · before 6.1.135
linux linux kernel6.2 and later · before 6.6.88
linux linux kernel6.7 and later · before 6.12.25
linux linux kernel6.13 and later · before 6.14.4
linux linux kernel3.17
linux linux kernel6.15

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
- 3.17affected
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before c731cdfddcf1be1590d5ba8c9b508f98e3a2b3d6affected · git
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before 6e4ab3e574c2a335b40fa1f70d1c54fcb58ab33faffected · git
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before 3c619aec1f538333b56746d2f796aab1bca5c9a5affected · git
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before 5e7df74745700f059dc117a620e566964a2e8f2caffected · git
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before 7ca513631fa6ad3011b8b9197cdde0f351103704affected · git
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before a9682bfef2cf3802515a902e964d774e137be1b9affected · git
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before 152721cbae42713ecfbca6847e0f102ee6b19546affected · git
- 29e20aa6c6aff35c81d4da2e2cd516dadb569061 and later · before 27c7e63b3cb1a20bb78ed4a36c561ea4579fd7daaffected · git
- before 3.17not 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 6.1.135-1	6.1.135-1
Debian:13	linux	before 6.12.25-1	6.12.25-1

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-2025-37793May 1, 2025 · ASoC: Intel: avs: Fix null-ptr-deref in avs_component_probe()
22Monitor
← EarlierCVE-2025-37794May 1, 2025 · wifi: mac80211: Purge vif txq in ieee80211_do_stop()
22Monitor
Later →CVE-2020-36790May 1, 2025 · nvmet: fix a memory leak
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 / package	Fixed version	Source
Linux Linux	152721cbae42713ecfbca6847e0f102ee6b19546	Vendor (CNA)
Linux Linux	27c7e63b3cb1a20bb78ed4a36c561ea4579fd7da	Vendor (CNA)
Linux Linux	3c619aec1f538333b56746d2f796aab1bca5c9a5	Vendor (CNA)
Linux Linux	5e7df74745700f059dc117a620e566964a2e8f2c	Vendor (CNA)
Linux Linux	6e4ab3e574c2a335b40fa1f70d1c54fcb58ab33f	Vendor (CNA)
Linux Linux	7ca513631fa6ad3011b8b9197cdde0f351103704	Vendor (CNA)
Linux Linux	a9682bfef2cf3802515a902e964d774e137be1b9	Vendor (CNA)
Linux Linux	c731cdfddcf1be1590d5ba8c9b508f98e3a2b3d6	Vendor (CNA)
azl3 kernel 6.6.85.1-4 on Azure Linux 3.0	6.6.92.2-1 · CBL-Mariner Releases	Microsoft (MSRC)
azl3 kernel 6.6.92.2-1 on Azure Linux 3.0	6.6.92.2-1 · CBL-Mariner Releases	Microsoft (MSRC)
debian:linux	6.1.135-1 · 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, 10:10 PM UTC

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

References

git.kernel.org/stable/c/152721cbae42713ecfbca6847e0f102ee6b19546

Show all references (9 more)

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

All records