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NVD / CVE Program· CNA Linux

CVE-2025-38676: iommu/amd: Avoid stack buffer overflow from kernel cmdline

Noroxi assessment

Priority: Monitor (action score 31/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.41% (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 0ad8509b468fa1058f4f400a1829f29e4ccc4de8, 4bdb0f78bddbfa77d3ab458a21dd9cec495d317a, 5.10.241; azl3 kernel 6.6.96.2-1 on Azure Linux 3.0 CBL-Mariner Releases; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.

Low priority for now. Upgrade to Linux Linux 0ad8509b468fa1058f4f400a1829f29e4ccc4de8, 4bdb0f78bddbfa77d3ab458a21dd9cec495d317a, 5.10.241; azl3 kernel 6.6.96.2-1 on Azure Linux 3.0 CBL-Mariner Releases; 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: iommu/amd: Avoid stack buffer overflow from kernel cmdline While the kernel command line is considered trusted in most environments, avoid writing 1 byte past the end of "acpiid" if the "str" argument is maximum length.

HighCVSS 7.8 · v3.1—Proof of concept Fix available
Published
Aug 26, 2025
Updated
Nov 5, 2026
EPSS
0.4% · 36th percentile

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 · 0.4%

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
  • Proof of concept exists, no weaponized module
  • A fix has been released

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

Follow CVE-2025-38676

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 kernel5.10.175 and later · before 5.10.241
  • linux linux kernel5.15.103 and later · before 5.15.190
  • linux linux kernel6.1.16 and later · before 6.1.149
  • linux linux kernel5.4.237 and later · before 5.5
  • linux linux kernel6.7 and later · before 6.12.44
  • linux linux kernel6.13 and later · before 6.16.4
  • linux linux kernel6.2.3 and later · before 6.6.103
  • linux linux kernel6.17

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

    • 5e97dc748d13fad582136ba0c8cec215c7aeeb17, 63cd11165e5e0ea2012254c764003eda1f9adb7d, 6.3affected
    • f2a5ec7f7b28f9b9cd5fac232ff51019a7f7b9e9 and later · before a732502bf3bbe859613b6d7b2b0313b11f0474acaffected · git
    • c513043e0afe6a8ba79d00af358655afabb576d2 and later · before 0ad8509b468fa1058f4f400a1829f29e4ccc4de8affected · git
    • 2ae19ac3ea82a5b87a81c10adbb497c9e58bdd60 and later · before 9ff52d3af0ef286535749e14e3fe9eceb39a8349affected · git
    • b6b26d86c61c441144c72f842f7469bb686e1211 and later · before 8f80c633cba144f721d38d9380f23d23ab7db10eaffected · git
    • b6b26d86c61c441144c72f842f7469bb686e1211 and later · before 4bdb0f78bddbfa77d3ab458a21dd9cec495d317aaffected · git
    • b6b26d86c61c441144c72f842f7469bb686e1211 and later · before 736db11c86f03e717fc4bf771d05efdf10d23acbaffected · git
    • b6b26d86c61c441144c72f842f7469bb686e1211 and later · before 8503d0fcb1086a7cfe26df67ca4bd9bd9e99bdecaffected · git
    • 5.10.175 and later · before 5.10.241affected · semver
    • 5.15.103 and later · before 5.15.190affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.153-16.1.153-1
Debian:13linuxbefore 6.12.48-16.12.48-1
Debian:14linuxbefore 6.16.5-16.16.5-1

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-2025-38674Aug 22, 2025 · Revert "drm/prime: Use dma_buf from GEM object instance"
    22Monitor
  • ← EarlierCVE-2025-38675Aug 22, 2025 · xfrm: state: initialize state_ptrs earlier in xfrm_state_find
    18Monitor
  • Later →CVE-2024-58240Aug 28, 2025 · tls: separate no-async decryption request handling from async
    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 Linux0ad8509b468fa1058f4f400a1829f29e4ccc4de8Vendor (CNA)
Linux Linux4bdb0f78bddbfa77d3ab458a21dd9cec495d317aVendor (CNA)
Linux Linux5.10.241Vendor (CNA)
Linux Linux5.15.190Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux6.1.149Vendor (CNA)
Linux Linux6.3Vendor (CNA)
Linux Linux736db11c86f03e717fc4bf771d05efdf10d23acbVendor (CNA)
Linux Linux8503d0fcb1086a7cfe26df67ca4bd9bd9e99bdecVendor (CNA)
Linux Linux8f80c633cba144f721d38d9380f23d23ab7db10eVendor (CNA)
Linux Linux9ff52d3af0ef286535749e14e3fe9eceb39a8349Vendor (CNA)
Linux Linuxa732502bf3bbe859613b6d7b2b0313b11f0474acVendor (CNA)
azl3 kernel 6.6.96.2-1 on Azure Linux 3.0CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.153-1 · Debian:12Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:12025-08-27

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.

  1. Published
  2. First PoCsame day
  3. TodayNov 10, 2026+441 d

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-787 · Out-of-bounds Write

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. 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