CVE-2015-8787

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-02-08 · updated 2026-06-17
Weakness: CWE-476

Description

The nf_nat_redirect_ipv4 function in net/netfilter/nf_nat_redirect.c in the Linux kernel before 4.4 allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by sending certain IPv4 packets to an incompletely configured interface, a related issue to CVE-2003-1604.

Affected products

Linux kernel: from 3.19 before 4.1.31; from 4.2 before 4.4 — fixed in 4.1.31, 4.4

How to fix

Upgrade to a fixed version: Linux kernel 4.1.31, 4.4. Check the vendor advisory for mitigations.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=94f9cd81436c85d8c3a318ba92e236ede73752fc
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176464.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
http://www.openwall.com/lists/oss-security/2016/01/27/6
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
http://www.ubuntu.com/usn/USN-2889-1
http://www.ubuntu.com/usn/USN-2889-2
http://www.ubuntu.com/usn/USN-2890-1
http://www.ubuntu.com/usn/USN-2890-2
http://www.ubuntu.com/usn/USN-2890-3

Get alerted when CVE-2015-8787 or the next vulnerability affects your stack