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Fencer Intel
high 7.8

CVE-2025-38403 json

vsock/vmci: Clear the vmci transport packet properly when initializing it

published last yr. modified 4mo ago also EUVD-2025-22599

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits
0
none known

Summary

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.

Patch / fix

  • Linux Linux 5.4.296, 5.10.240, 5.15.187, 6.1.144, 6.6.97, 6.12.37, 6.15.6, 6.16
  • linux Debian 12 6.1.147-1
  • linux Debian 14, Debian 13 6.12.37-1

debian advisories DEBIAN-CVE-2025-38403

  • linux Ubuntu 22.04 LTS 5.15.0-156.166
  • linux Ubuntu 24.04 LTS 6.8.0-100.100
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1092.99
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1046.49
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1092.101
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1047.50
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1089.95
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1043.48

ubuntu advisories UBUNTU-CVE-2025-38403

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt RHEL 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.104.1.rt7.445.el8_10

red hat advisories RHSA-2026:65712RHSA-2026:2378RHSA-2026:2282RHSA-2026:2264RHSA-2026:2212

  • kernel-rt Linux Micro 6.2 6.12.0-160000.6.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.6.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1.160000.2.4
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.6.1
  • kernel-obs-qa SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.6.1

suse advisories SUSE-SU-2025:21074-1SUSE-SU-2025:21139-1SUSE-SU-2026:20560-1SUSE-SU-2025:21179-1SUSE-SU-2025:03023-1SUSE-SU-2025:03011-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.6.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.6.1
  • kernel-kvmsmall openSUSE Leap 16.0 6.12.0-160000.6.1

opensuse advisories openSUSE-SU-2025:20081-1

  • kernel-rt AlmaLinux 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.104.1.rt7.445.el8_10
  • kernel AlmaLinux 9 5.14.0-611.30.1.el9_7

almalinux advisories ALSA-2026:2378ALSA-2026:2212ALSA-2026:2264ALSA-2026:2282

  • kernel Rocky Linux 10 6.12.0-124.35.1.el10_1
  • kernel Rocky Linux 9 5.14.0-611.30.1.el9_7
  • kernel Rocky Linux 8 4.18.0-553.104.1.el8_10

rocky linux advisories RLSA-2026:2282RLSA-2026:2212RLSA-2026:2264

  • kernel Azure Linux 3.0 6.6.104.2-1
  • kernel CBL-Mariner 2.0 5.15.200.1-1

azure linux advisories AZL-65771AZL-73025

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2025-38403 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-38403 updated cvss 7.1

kernel: Kernel: Privilege escalation via uninitialized data in vmci transport packet

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.30.1.el9_7, perf 5.14.0-611.30.1.el9_7, rtla 5.14.0-611.30.1.el9_7, python3-perf 5.14.0-611.30.1.el9_7, kernel-devel-matched 5.14.0-611.30.1.el9_7, kernel-64k-devel-matched 5.14.0-611.30.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.35.1.el10_1, perf 6.12.0-124.35.1.el10_1, rtla 6.12.0-124.35.1.el10_1, python3-perf 6.12.0-124.35.1.el10_1, kernel-devel-matched 6.12.0-124.35.1.el10_1, kernel-64k-devel-matched 6.12.0-124.35.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:2282
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.149.1.el9_4, perf 5.14.0-427.149.1.el9_4, rtla 5.14.0-427.149.1.el9_4, kernel-devel-matched 5.14.0-427.149.1.el9_4, kernel-64k-devel-matched 5.14.0-427.149.1.el9_4, kernel-debug-devel-matched 5.14.0-427.149.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:65712
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.104.1.el8_10, kernel 4.18.0-553.104.1.el8_10, bpftool 4.18.0-553.104.1.el8_10, kernel-core 4.18.0-553.104.1.el8_10, kernel-tools 4.18.0-553.104.1.el8_10, python3-perf 4.18.0-553.104.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:2264
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.30.1.el9_7, kernel-64k 5.14.0-611.30.1.el9_7, kernel-core 5.14.0-611.30.1.el9_7, kernel-tools 5.14.0-611.30.1.el9_7, kernel-modules 5.14.0-611.30.1.el9_7, kernel-64k-core 5.14.0-611.30.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.35.1.el10_1, kernel-64k 6.12.0-124.35.1.el10_1, kernel-core 6.12.0-124.35.1.el10_1, kernel-tools 6.12.0-124.35.1.el10_1, kernel-modules 6.12.0-124.35.1.el10_1, kernel-64k-core 6.12.0-124.35.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:2282
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.149.1.el9_4, kernel 5.14.0-427.149.1.el9_4, kernel-64k 5.14.0-427.149.1.el9_4, kernel-core 5.14.0-427.149.1.el9_4, kernel-tools 5.14.0-427.149.1.el9_4, python3-perf 5.14.0-427.149.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:65712
show 12 more
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.30.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.30.1.el9_7
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.35.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.35.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.35.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.35.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.35.1.el10_1
    fixed: vendor fix RHSA-2026:2282
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.104.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.104.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.104.1.el8_10
    fixed: vendor fix RHSA-2026:2264
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-kvm 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-core 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-modules 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-debug-kvm 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-debug-core 4.18.0-553.104.1.rt7.445.el8_10, +4 more
    fixed: vendor fix RHSA-2026:2378
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.30.1.el9_7, kernel-rt-64k 5.14.0-611.30.1.el9_7, kernel-rt-core 5.14.0-611.30.1.el9_7, kernel-rt-modules 5.14.0-611.30.1.el9_7, kernel-rt-64k-core 5.14.0-611.30.1.el9_7, kernel-rt-debug-core 5.14.0-611.30.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.35.1.el10_1, kernel-rt-64k 6.12.0-124.35.1.el10_1, kernel-rt-core 6.12.0-124.35.1.el10_1, kernel-rt-modules 6.12.0-124.35.1.el10_1, kernel-rt-64k-core 6.12.0-124.35.1.el10_1, kernel-rt-debug-core 6.12.0-124.35.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:2282
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.149.1.el9_4, kernel-rt-core 5.14.0-427.149.1.el9_4, kernel-rt-modules 5.14.0-427.149.1.el9_4, kernel-rt-debug-core 5.14.0-427.149.1.el9_4, kernel-rt-modules-core 5.14.0-427.149.1.el9_4, kernel-rt-debug-modules 5.14.0-427.149.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:65712
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.30.1.el9_7, kernel-rt-core 5.14.0-611.30.1.el9_7, kernel-rt-modules 5.14.0-611.30.1.el9_7, kernel-rt-debug-core 5.14.0-611.30.1.el9_7, kernel-rt-modules-core 5.14.0-611.30.1.el9_7, kernel-rt-debug-modules 5.14.0-611.30.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:2212
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.35.1.el10_1, kernel-rt-core 6.12.0-124.35.1.el10_1, kernel-rt-modules 6.12.0-124.35.1.el10_1, kernel-rt-debug-core 6.12.0-124.35.1.el10_1, kernel-rt-modules-core 6.12.0-124.35.1.el10_1, kernel-rt-debug-modules 6.12.0-124.35.1.el10_1, +4 more
    fixed: vendor fix RHSA-2026:2282
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.149.1.el9_4, kernel-rt-kvm 5.14.0-427.149.1.el9_4, kernel-rt-core 5.14.0-427.149.1.el9_4, kernel-rt-modules 5.14.0-427.149.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.149.1.el9_4, kernel-rt-debug-core 5.14.0-427.149.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:65712
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-core 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-modules 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-debug-core 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-debug-modules 4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-modules-extra 4.18.0-553.104.1.rt7.445.el8_10, +2 more
    fixed: vendor fix RHSA-2026:2378
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.