Use-after-free in Linux kernel - CVE-2016-4558
Published: May 23, 2016 / Updated: June 3, 2024
Vulnerability identifier: #VU90829
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-4558
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to a use-after-free error within the replace_map_fd_with_map_ptr() function in kernel/bpf/verifier.c, within the __bpf_map_get(), bpf_map_get_with_uref(), __bpf_prog_get() and bpf_prog_get() functions in kernel/bpf/syscall.c, within the bpf_any_get() and bpf_obj_do_get() functions in kernel/bpf/inode.c. A local user can execute arbitrary code.
Affected software
Linux kernel
How to mitigate CVE-2016-4558
Install update from vendor's website.
Links to Public Exploits and PoC-codes
External References
- https://github.com/torvalds/linux/commit/92117d8443bc5afacc8d5ba82e541946310f106e
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
- http://www.openwall.com/lists/oss-security/2016/05/06/4
- https://bugzilla.redhat.com/show_bug.cgi?id=1334303
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92117d8443bc5afacc8d5ba82e541946310f106e
- http://www.ubuntu.com/usn/USN-3007-1
- http://www.ubuntu.com/usn/USN-3005-1
- http://www.ubuntu.com/usn/USN-3006-1