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NVD / CVE Program· CNA Linux

CVE-2025-38403: vsock/vmci: Clear the vmci transport packet properly when initializing it

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: 0.21% (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 0a01021317375b8d1895152f544421ce49299eb1, 19c2cc01ff9a8031398a802676ffb0f4692dd95d, 1c1bcb0e78230f533b4103e8cf271d17c3f469f0; 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.

Low priority for now. Upgrade to Linux Linux 0a01021317375b8d1895152f544421ce49299eb1, 19c2cc01ff9a8031398a802676ffb0f4692dd95d, 1c1bcb0e78230f533b4103e8cf271d17c3f469f0; 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: vsock/vmci: Clear the vmci transport packet properly when initializing it In vmci_transport_packet_init memset the vmci_transport_packet before populating the fields to avoid any uninitialised data being left in the structure.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jul 25, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 12th percentile
CWE
—

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 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

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.

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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 kernel5.5 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 kernel3.9 and later · before 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

    • 3.9affected
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before 19c2cc01ff9a8031398a802676ffb0f4692dd95daffected · git
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before 1c1bcb0e78230f533b4103e8cf271d17c3f469f0affected · git
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before 2d44723a091bc853272e1a51a488a3d22b80be5eaffected · git
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before 0a01021317375b8d1895152f544421ce49299eb1affected · git
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before 94d0c326cb3ee6b0f8bd00e209550b93fcc5c839affected · git
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before 75705b44e0b9aaa74f4c163d93d388bcba9e386aaffected · git
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before e9a673153d578fd439919a24e99851b2f87ecbceaffected · git
    • d021c344051af91f42c5ba9fdedc176740cbd238 and later · before 223e2288f4b8c262a864e2c03964ffac91744cd5affected · git
    • before 3.9not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-124.35.1.el10_16.12.0-124.35.1.el10_1
AlmaLinux:10kernel-docbefore 6.12.0-124.35.1.el10_16.12.0-124.35.1.el10_1
AlmaLinux:8bpftoolbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.104.1.el8_104.18.0-553.104.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.104.1.rt7.445.el8_104.18.0-553.104.1.rt7.445.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.104.1.rt7.445.el8_104.18.0-553.104.1.rt7.445.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.104.1.rt7.445.el8_104.18.0-553.104.1.rt7.445.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.104.1.rt7.445.el8_104.18.0-553.104.1.rt7.445.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.104.1.rt7.445.el8_104.18.0-553.104.1.rt7.445.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.104.1.rt7.445.el8_104.18.0-553.104.1.rt7.445.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.104.1.rt7.445.el8_104.18.0-553.104.1.rt7.445.el8_10

+96

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-2025-38401Jul 25, 2025 · mtk-sd: Prevent memory corruption from DMA map failure
    31Monitor
  • ← EarlierCVE-2025-38402Jul 25, 2025 · idpf: return 0 size for RSS key if not supported
    22Monitor
  • Later →CVE-2025-38404Jul 25, 2025 · usb: typec: displayport: Fix potential deadlock
    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 Linux0a01021317375b8d1895152f544421ce49299eb1Vendor (CNA)
Linux Linux19c2cc01ff9a8031398a802676ffb0f4692dd95dVendor (CNA)
Linux Linux1c1bcb0e78230f533b4103e8cf271d17c3f469f0Vendor (CNA)
Linux Linux223e2288f4b8c262a864e2c03964ffac91744cd5Vendor (CNA)
Linux Linux2d44723a091bc853272e1a51a488a3d22b80be5eVendor (CNA)
Linux Linux75705b44e0b9aaa74f4c163d93d388bcba9e386aVendor (CNA)
Linux Linux94d0c326cb3ee6b0f8bd00e209550b93fcc5c839Vendor (CNA)
Linux Linuxe9a673153d578fd439919a24e99851b2f87ecbceVendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.06.6.104.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-611.30.1.el9_7 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.147-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-611.30.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-611.30.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-611.30.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-611.30.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-611.30.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-611.30.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-611.30.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+6

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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)

—

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. 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