CVE-2016-6522 json
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 pa…
published 2017-03-07 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-7443
- cvss
- 5.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 38%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- openwall.com http://www.openwall.com/lists/oss-security/2016/08/02/8 referenced PoC, tagged "exploit" by a source, unverified
- openwall.com http://www.openwall.com/lists/oss-security/2016/08/02/12 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
-
ftp.openbsd.org
/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig
patch
-
openwall.com
/lists/oss-security/2016/08/02/8
mailing-list, exploit, third-party-advisory
-
openwall.com
/lists/oss-security/2016/08/02/12
mailing-list, exploit, third-party-advisory
-
securityfocus.com
/bid/92264
vdb-entry
Sources
- CVE List CVE-2016-6522
- NVD CVE-2016-6522
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