Vulnerability · Published Feb 28, 2023 · Assigned by google_android
CVE-2023-20938
High 8.1
In plain English
A high-severity use-after-free in Android. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official description
In binder_transaction_buffer_release of binder.c, there is a possible use after free due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-257685302References: Upstream kernel
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.17.6-1 | DEBIAN-CVE-2023-20938 |
| Debian:13 | linux | 5.17.6-1 | DEBIAN-CVE-2023-20938 |
| Debian:14 | linux | 5.17.6-1 | DEBIAN-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux | 5.15.0-72.79 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux | 5.15.0-72.79 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1036.40 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1036.40 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1038.45 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1038.45 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1038.45.1 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1038.45.1 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1034.42 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1034.42 | USN-6090-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1033.38 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1033.38 | USN-6090-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1020.25 | USN-6090-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1020.25 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1030.33 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1030.33 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1030.35 | USN-6133-1 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1030.35 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1033.38 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1033.38 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-72.79 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-72.79 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1025.25 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | 5.17.0-1011.12 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1035.41 | USN-6080-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1035.41 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1029.31 | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1029.31 | USN-6085-1 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2023-20938 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2023-20938 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H