CVE-2016-4557

High

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.

Package Linux Kernel
Published 2016-05-23
Last modified 2026-05-06
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

9 total
Showing 5 of 9 references View all on NVD

Frequently asked questions

  • What is CVE-2016-4557?

    CVE-2016-4557 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2016-4557 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2016-4557?

    CVE-2016-4557 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2016-4557?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2016-4557 patch availability.

  • Is CVE-2016-4557 actively exploited?

    No. CVE-2016-4557 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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