Vulnerability · Published Jun 28, 2023 · Assigned by fedora
CVE-2023-3439
Medium 4.7
In plain English
A medium-severity use-after-free in Linux Kernel (mctp). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.7Medium
Exploit odds (30 days)0.3%top 72.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A flaw was found in the MCTP protocol in the Linux kernel. The function mctp_unregister() reclaims the device's relevant resource when a netcard detaches. However, a running routine may be unaware of this and cause the use-after-free of the mdev->addrs object, potentially leading to a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.17.6-1 | DEBIAN-CVE-2023-3439 |
| Debian:13 | linux | 5.17.6-1 | DEBIAN-CVE-2023-3439 |
| Debian:14 | linux | 5.17.6-1 | DEBIAN-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux | 5.15.0-78.85 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux | 5.15.0-78.85 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1040.45 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1040.45 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1042.49 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1042.49 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1042.49.1 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1042.49.1 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1038.46 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1038.46 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1038.43 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1038.43 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1024.29 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1024.29 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1034.37 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1034.37 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1036.41 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1036.41 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1038.43 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1038.43 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-78.85 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-78.85 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1029.29 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1029.29 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1016.16 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 5.15.0-1002.2 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1011.12 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1039.45 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1039.45 | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1034.37 | USN-6246-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1034.37 | UBUNTU-CVE-2023-3439 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2023-3439 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | UBUNTU-CVE-2023-3439 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Linux Kernel (mctp) | Fixed in kernel 5.18-rc5 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H