CVE-2018-5703 Memory corruption in n/a

What is CVE-2018-5703?

CVE-2018-5703 is a critical memory corruption vulnerability in Linux kernel, published on 16 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.14.11 allows attackers to cause a denial of service (slab out-of-bounds write) or possibly have unspecified other impact via vectors involving TLS.

Weakness: CWE-787

Which versions are affected by CVE-2018-5703?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2018-5703?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-5703 being exploited?

There is no known exploitation of CVE-2018-5703 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-5703, GHSA-jc32-3h2c-hmcc, UBUNTU-CVE-2018-5703.