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CVE-2016-4557

Published: May 23, 2016

Modified: Aug 6, 2024

PUBLISHED

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

References

https://bugs.debian.org/823603

x_refsource_CONFIRM

openSUSE-SU-2016:1641

vendor-advisory

x_refsource_SUSE

https://bugzilla.redhat.com/show_bug.cgi?id=1334307

x_refsource_CONFIRM

https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7

x_refsource_CONFIRM

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5

x_refsource_CONFIRM

https://bugs.chromium.org/p/project-zero/issues/detail?id=808

x_refsource_MISC

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7

x_refsource_CONFIRM

[oss-security] 20160506 CVE Requests: Linux: BPF flaws (one use-after-free / local root privilege escalation)

mailing-list

x_refsource_MLIST

exploit

x_refsource_EXPLOIT-DB

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