CVE-2016-6522

low-risk
Published 2017-03-07

Integer overflow in the uvm_map_isavail function in uvm/uvm_map.c in OpenBSD 5.9 allows local users to cause a denial of service (kernel panic) via a crafted mmap call, which triggers the new mapping to overlap with an existing mapping.

Do I need to act?

-
0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Openbsd

References (8)

Patch http://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig
Exploit http://www.openwall.com/lists/oss-security/2016/08/02/12
Exploit http://www.openwall.com/lists/oss-security/2016/08/02/8
http://www.securityfocus.com/bid/92264
Patch http://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig
Exploit http://www.openwall.com/lists/oss-security/2016/08/02/12
Exploit http://www.openwall.com/lists/oss-security/2016/08/02/8
http://www.securityfocus.com/bid/92264
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal