low3.3
CVE-2021-21781
An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54.
Impact
An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | Versions 5.4.54, 5.4.66 |
| Oracle | Communications Cloud Native Core Binding Support Function | Version 22.1.3 |
| Oracle | Communications Cloud Native Core Network Exposure Function | Version 22.1.1 |
| Oracle | Communications Cloud Native Core Policy | Version 22.2.0 |