What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-25 · updated 2026-06-17

Description

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.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 3.9 before 5.4.296; from 5.5 before 5.10.240; from 5.11 before 5.15.187; from 5.16 before 6.1.144; from 6.2 before 6.6.97; from 6.7 before 6.12.37 — fixed in 5.10.240, 5.15.187, 5.4.296, 6.1.144, 6.12.37, 6.15.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.240, 5.15.187, 5.4.296, 6.1.144. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0a01021317375b8d1895152f544421ce49299eb1
• https://git.kernel.org/stable/c/19c2cc01ff9a8031398a802676ffb0f4692dd95d
• https://git.kernel.org/stable/c/1c1bcb0e78230f533b4103e8cf271d17c3f469f0
• https://git.kernel.org/stable/c/223e2288f4b8c262a864e2c03964ffac91744cd5
• https://git.kernel.org/stable/c/2d44723a091bc853272e1a51a488a3d22b80be5e
• https://git.kernel.org/stable/c/75705b44e0b9aaa74f4c163d93d388bcba9e386a
• https://git.kernel.org/stable/c/94d0c326cb3ee6b0f8bd00e209550b93fcc5c839
• https://git.kernel.org/stable/c/e9a673153d578fd439919a24e99851b2f87ecbce
• https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
• https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

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