Integer overflow in OpenBSD
CVE-2016-6522
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- OpenBSD — versions 5.9
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2016/08/02/8 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig (Patch)
- www.openwall.com/lists/oss-security/2016/08/02/12 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/92264 (vdb-entry)
Frequently asked questions
- What is CVE-2016-6522?
- CVE-2016-6522 is a medium-severity vulnerability in OpenBSD, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2017-03-07.
- How severe is CVE-2016-6522?
- Medium severity. CVSS v3 base score is 5.5 out of 10.