NVD / CVE Program· CNA Linux

CVE-2025-38386: ACPICA: Refuse to evaluate a method if arguments are missing

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: 0.21% (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 18ff4ed6a33a7e3f2097710eacc96bea7696e803, 2219e49857ffd6aea1b1ca5214d3270f84623a16, 4305d936abde795c2ef6ba916de8f00a50f64d2d; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.
Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 18ff4ed6a33a7e3f2097710eacc96bea7696e803, 2219e49857ffd6aea1b1ca5214d3270f84623a16, 4305d936abde795c2ef6ba916de8f00a50f64d2d; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 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: ACPICA: Refuse to evaluate a method if arguments are missing As reported in [1], a platform firmware update that increased the number of method parameters and forgot to update a least one of its callers, caused ACPICA to crash due to use-after-free. Since this a result of a clear AML issue that arguably cannot be fixed up by the interpreter (it cannot produce missing data out of thin air), address it by making ACPICA refuse to evaluate a method if the caller attempts to pass fewer arguments than expected to it.

MediumCVSS 5.5 · v3.1—No exploit Fix available

BDU:2025-10801

Published: Jul 25, 2025
Updated: Oct 15, 2026
EPSS: 0.2% · 11th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 5.5
CNA · Linux: 7.8; 2.3 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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.

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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
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 kernel5.5 and later · before 5.10.240
linux linux kernel5.11 and later · before 5.15.187
linux linux kernel5.16 and later · before 6.1.144
linux linux kernelbefore 5.4.296
linux linux kernel6.7 and later · before 6.12.37
linux linux kernel6.13 and later · before 6.15.6
linux linux kernel6.2 and later · before 6.6.97
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
- 2.6.12affected
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b49d224d1830c46e20adce2a239c454cdab426f1affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 2219e49857ffd6aea1b1ca5214d3270f84623a16affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before ab1e8491c19eb2ea0fda81ef28e841c7cb6399f5affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 4305d936abde795c2ef6ba916de8f00a50f64d2daffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d547779e72cea9865b732cd45393c4cd02b3598eaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 18ff4ed6a33a7e3f2097710eacc96bea7696e803affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c9e4da550ae196132b990bd77ed3d8f2d9747f87affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6fcab2791543924d438e7fa49276d0998b0a069faffected · git
- before 2.6.12not 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 6.12.37-1	6.12.37-1

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-2025-38375Jul 25, 2025 · virtio-net: ensure the received length does not exceed allocated size
31Monitor
← EarlierCVE-2025-38385Jul 25, 2025 · net: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect
31Monitor
Later →CVE-2025-38387Jul 25, 2025 · RDMA/mlx5: Initialize obj_event->obj_sub_list before xa_insert
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	18ff4ed6a33a7e3f2097710eacc96bea7696e803	Vendor (CNA)
Linux Linux	2219e49857ffd6aea1b1ca5214d3270f84623a16	Vendor (CNA)
Linux Linux	4305d936abde795c2ef6ba916de8f00a50f64d2d	Vendor (CNA)
Linux Linux	6fcab2791543924d438e7fa49276d0998b0a069f	Vendor (CNA)
Linux Linux	ab1e8491c19eb2ea0fda81ef28e841c7cb6399f5	Vendor (CNA)
Linux Linux	b49d224d1830c46e20adce2a239c454cdab426f1	Vendor (CNA)
Linux Linux	c9e4da550ae196132b990bd77ed3d8f2d9747f87	Vendor (CNA)
Linux Linux	d547779e72cea9865b732cd45393c4cd02b3598e	Vendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.0	6.6.104.2-1 · CBL-Mariner Releases	Microsoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0	5.15.200.1-1 · 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: 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)

CWE-416 · Use After Free

CVSS vector

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

SSVC exploitation— → noneOct 15, 2026, 11:07 PM UTC
Fix✗ → ✓Sep 28, 2026, 10:08 PM UTC

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

References

git.kernel.org/stable/c/18ff4ed6a33a7e3f2097710eacc96bea7696e803

Show all references (9 more)

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

All records