CVE-2013-4163

CVE-2013-4163 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

• Severity: Medium (CVSS 2.0 base score 4.7)
• EPSS exploit prediction: 1% (41st percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Linux Linux Kernel
• Published: 2013-07-29
• Last modified: 2026-06-16

Description

The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6 implementation in the Linux kernel through 3.10.3 does not properly maintain information about whether the IPV6_MTU setsockopt option had been specified, which allows local users to cause a denial of service (BUG and system crash) via a crafted application that uses the UDP_CORK option in a setsockopt system call.

Frequently asked questions

What is CVE-2013-4163?

The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6 implementation in the Linux kernel through 3.10.3 does not properly maintain information about whether the IPV6_MTU setsockopt option had been specified, which allows local users to cause a denial of service (BUG and system crash) via a crafted application that uses the UDP_CORK option in a setsockopt system call.

How severe is CVE-2013-4163?

CVE-2013-4163 has a CVSS 2.0 base score of 4.7, rated medium severity.

Is CVE-2013-4163 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4163?

CVE-2013-4163 primarily affects Linux Linux Kernel. In total, 248 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4163?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-4163 published?

CVE-2013-4163 was published on 2013-07-29 and last updated on 2026-06-16.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=75a493e60ac4bbe2e977e7129d6d8cbb0dd236be
• http://lists.opensuse.org/opensuse-security-announce/2013-09/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2013-09/msg00004.html
• http://secunia.com/advisories/54148
• http://www.openwall.com/lists/oss-security/2013/07/23/10
• http://www.securityfocus.com/bid/61412
• http://www.ubuntu.com/usn/USN-1938-1
• http://www.ubuntu.com/usn/USN-1941-1
• http://www.ubuntu.com/usn/USN-1942-1
• http://www.ubuntu.com/usn/USN-1943-1
• http://www.ubuntu.com/usn/USN-1944-1
• http://www.ubuntu.com/usn/USN-1945-1
• http://www.ubuntu.com/usn/USN-1946-1
• http://www.ubuntu.com/usn/USN-1947-1
• https://bugzilla.redhat.com/show_bug.cgi?id=987633
• https://github.com/torvalds/linux/commit/75a493e60ac4bbe2e977e7129d6d8cbb0dd236be

Affected products (248)

• cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.9:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.13:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.14:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.15:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.16:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.17:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.21:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.23:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.26:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.27:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.28:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.30:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.31:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*

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