CVE-2021-4159
Medium
Description
A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.
SeverityMedium
CVSS4.4
Exploit probability—
Product
Linux Kernel
PublishedAug 24, 2022
First seenAug 24, 2022
Weakness typeCWE-202CWE-202
How to fix
Update
- linux linux_kernel5.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 5.7 | 5.7 |
| redhat enterprise_linux | 8.0 | — |
| debian debian_linux | 10.0 | — |
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