CVE-2016-9755

Severity: high (CVSS 7.8 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-787

Description

The netfilter subsystem in the Linux kernel before 4.9 mishandles IPv6 reassembly, which allows local users to cause a denial of service (integer overflow, out-of-bounds write, and GPF) or possibly have unspecified other impact via a crafted application that makes socket, connect, and writev system calls, related to net/ipv6/netfilter/nf_conntrack_reasm.c and net/ipv6/netfilter/nf_defrag_ipv6_hooks.c.

Affected products

Linux kernel: through 4.8.15

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa
http://www.openwall.com/lists/oss-security/2016/12/01/10
http://www.securityfocus.com/bid/94626
https://bugzilla.redhat.com/show_bug.cgi?id=1400904
https://github.com/torvalds/linux/commit/9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa
https://groups.google.com/forum/#%21topic/syzkaller/GFbGpX7nTEo
https://www.spinics.net/lists/netdev/msg407525.html
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa
http://www.openwall.com/lists/oss-security/2016/12/01/10
http://www.securityfocus.com/bid/94626
https://bugzilla.redhat.com/show_bug.cgi?id=1400904
https://github.com/torvalds/linux/commit/9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa

Get alerted when CVE-2016-9755 or the next vulnerability affects your stack