CVE-2016-4557
7.8
HIGH
CVSS 3.1
EPSS 10.2%
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.
How to fix CVE-2016-4557
To remediate CVE-2016-4557, upgrade the affected package to a fixed version below.
- Debian/linux—upgrade to 4.5.3-1 or later
Is CVE-2016-4557 being exploited?
Moderate — EPSS is 10.2%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- from 0, < 4.5.3-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |