What’s Vulnerable › Vulnerabilities
CVE-2016-6213
- Severity: medium (CVSS 4.7 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: none known
- Published: 2016-12-28 · updated 2026-06-17
- Weakness: CWE-400
Description
fs/namespace.c in the Linux kernel before 4.9 does not restrict how many mounts may exist in a mount namespace, which allows local users to cause a denial of service (memory consumption and deadlock) via MS_BIND mount system calls, as demonstrated by a loop that triggers exponential growth in the number of mounts.
Affected products
- Linux kernel: through 4.8.15
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d29216842a85c7970c536108e093963f02714498
- http://www.openwall.com/lists/oss-security/2016/07/13/8
- http://www.securityfocus.com/bid/91754
- https://access.redhat.com/errata/RHSA-2017:1842
- https://access.redhat.com/errata/RHSA-2017:2077
- https://bugzilla.redhat.com/show_bug.cgi?id=1356471
- https://github.com/torvalds/linux/commit/d29216842a85c7970c536108e093963f02714498
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d29216842a85c7970c536108e093963f02714498
- http://www.openwall.com/lists/oss-security/2016/07/13/8
- http://www.securityfocus.com/bid/91754
- https://access.redhat.com/errata/RHSA-2017:1842
- https://access.redhat.com/errata/RHSA-2017:2077
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