CVE-2016-6522

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-03-07 · updated 2026-06-17
Weakness: CWE-190

Description

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.

Affected products

OpenBSD: 5.9

References

http://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig
http://www.openwall.com/lists/oss-security/2016/08/02/12
http://www.openwall.com/lists/oss-security/2016/08/02/8
http://www.securityfocus.com/bid/92264
http://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig
http://www.openwall.com/lists/oss-security/2016/08/02/12
http://www.openwall.com/lists/oss-security/2016/08/02/8
http://www.securityfocus.com/bid/92264

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