Vulnerability · Published Apr 1, 2025 · Assigned by Linux
CVE-2025-21903mctp i3c: handle NULL header address
Medium 5.5
In plain English
A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 89.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: mctp i3c: handle NULL header address daddr can be NULL if there is no neighbour table entry present, in that case the tx packet should be dropped. saddr will usually be set by MCTP core, but check for NULL in case a packet is transmitted by a different protocol.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | linux | 6.12.19-1 | DEBIAN-CVE-2025-21903 |
| Debian:14 | linux | 6.12.19-1 | DEBIAN-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux | 6.8.0-84.84 | USN-7764-1 |
| Ubuntu:24.04:LTS | linux | 6.8.0-84.84 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1039.41 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1039.41 | USN-7764-1 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1039.41~22.04.1 | USN-7766-1 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1039.41~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1038.44 | USN-7802-1 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1038.44 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 6.11.0-1018.18~24.04.1 | USN-7628-1 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 6.11.0-1018.18~24.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1036.42~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1036.42~22.04.1 | USN-7802-1 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1025.27 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1025.27 | USN-7809-1 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1040.42 | USN-7764-1 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1040.42 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 6.11.0-1016.16~24.04.1 | USN-7605-1 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 6.11.0-1016.16~24.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1040.42~22.04.1 | USN-7766-1 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1040.42~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1036.40 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1036.40 | USN-7764-1 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1023.25 | USN-7764-1 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1023.25 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-28.28~24.04.1 | USN-7605-1 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-28.28~24.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-85.85~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-84.84~22.04.1 | USN-7764-2 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-85.85~22.04.1 | USN-7801-1 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1037.37 | USN-7779-1 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1037.37 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1037.37~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1037.37~22.04.1 | USN-7779-1 |
| Ubuntu:24.04:LTS | linux-intel | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-84.84.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-84.84.1 | USN-7764-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1015.16~24.04.2 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1015.16~24.04.2 | USN-7605-2 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-84.84.1~22.04.1 | USN-7764-1 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-84.84.1~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1039.42 | USN-7765-1 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1039.42 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | 6.11.0-1012.12 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1039.42~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1039.42~22.04.1 | USN-7765-1 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1039.42.1 | USN-7765-1 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1039.42.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1010.10 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1024.24 | USN-7606-1 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1024.24 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1037.38 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1037.38 | USN-7801-2 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1037.38~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1037.38~22.04.1 | USN-7801-3 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1039.43 | USN-7790-1 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1039.43 | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 6.8.0-84.84~22.04.1 | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2025-21903 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1018.19 | UBUNTU-CVE-2025-21903 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 – before d8be54c35aee29d96d1350b1b6f153be4da37c07c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 – before 740bf9c9b715cc327d34b1e2d4ee79fcd4c47a56c8755b29b58ec65be17bcb8c40763d2dcb1f1db5 – before cf7ee25e70c6edfac4553d6b671e8b19db1d9573 |
| Linux | Linux | 6.7 |