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Vulnerability record · CVE-2016-4557 · published 23 May 2016

CVE-2016-4557: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 10% · top 4.5%
7.8CVSS 3.1 base score, v2 7.2
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html Mailing ListThird Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/05/06/4 Mailing ListThird Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=808 Third Party Advisory
https://bugs.debian.org/823603 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1334307 Issue TrackingThird Party Advisory
https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 Vendor Advisory
https://www.exploit-db.com/exploits/40759/ Third Party AdvisoryVDB Entry
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html Mailing ListThird Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5 Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/05/06/4 Mailing ListThird Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=808 Third Party Advisory
https://bugs.debian.org/823603 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1334307 Issue TrackingThird Party Advisory
https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7 Vendor Advisory
https://www.exploit-db.com/exploits/40759/ Third Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2016-4557), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.