CVE-2016-4557
High
Description
The replace_map_fd_with_map_ptr function in kernel/bpf/verifier.c in the Linux kernel before 4.5.5 does not properly maintain an fd data structure, which allows local users to gain privileges or cause a denial of service (use-after-free) via crafted BPF instructions that reference an incorrect file descriptor.
SeverityHigh
CVSS7.8
Exploit probability96. percentile10.2%
Product
Linux Kernel
PublishedMay 23, 2016
First seenMay 23, 2016
How to fix
Update
- linux linux_kernel4.4.11, 4.5.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.4 ≤ v < 4.4.11, 4.5 ≤ v < 4.5.5 | 4.4.11, 4.5.5 |
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