CVE-2018-5703
The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.14.11...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-5703- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-5703- Updated
- 2026-11-02
EUVDEUVD-2018-17472 No score
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.
- Record
EUVD-2018-17472- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jc32-3h2c-hmcc
The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.14.11...
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.
- Record
GHSA-jc32-3h2c-hmcc- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-5703- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-5703
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.
- Record
DEBIAN-CVE-2018-5703- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-5703
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.
- Record
UBUNTU-CVE-2018-5703- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linuxDebian:12 |
before 4.15.11-1 | 4.15.11-1 |
linuxDebian:13 |
before 4.15.11-1 | 4.15.11-1 |
linuxDebian:14 |
before 4.15.11-1 | 4.15.11-1 |
linux-azureUbuntu:16.04:LTS |
before 4.15.0-1013.13~16.04.2, plus listed versions 4.11.0-1009.94.11.0-1011.114.11.0-1013.134.11.0-1014.144.11.0-1015.15 Show 10 moreShow less4.11.0-1016.164.13.0-1005.74.13.0-1006.84.13.0-1007.94.13.0-1009.124.13.0-1011.144.13.0-1012.154.13.0-1014.174.13.0-1016.194.13.0-1018.21 |
4.15.0-1013.13~16.04.2 |
linux-gcpUbuntu:16.04:LTS |
before 4.15.0-1014.14~16.04.1, plus listed versions 4.10.0-1004.44.10.0-1006.64.10.0-1007.74.10.0-1008.84.10.0-1009.9 Show 10 moreShow less4.13.0-1002.54.13.0-1006.94.13.0-1007.104.13.0-1008.114.13.0-1011.154.13.0-1012.164.13.0-1013.174.13.0-1015.194.13.0-1017.214.13.0-1019.23 |
4.15.0-1014.14~16.04.1 |
linux-hweUbuntu:16.04:LTS |
before 4.15.0-24.26~16.04.1, plus listed versions 4.8.0-36.36~16.04.14.8.0-39.42~16.04.14.8.0-41.44~16.04.14.8.0-42.45~16.04.14.8.0-44.47~16.04.1 Show 29 moreShow less4.8.0-45.48~16.04.14.8.0-46.49~16.04.14.8.0-49.52~16.04.14.8.0-51.54~16.04.14.8.0-52.55~16.04.14.8.0-53.56~16.04.14.8.0-54.57~16.04.14.8.0-56.61~16.04.14.8.0-58.63~16.04.14.10.0-27.30~16.04.24.10.0-28.32~16.04.24.10.0-30.34~16.04.14.10.0-32.36~16.04.14.10.0-33.37~16.04.14.10.0-35.39~16.04.14.10.0-37.41~16.04.14.10.0-38.42~16.04.14.10.0-40.44~16.04.14.10.0-42.46~16.04.14.13.0-26.29~16.04.24.13.0-31.34~16.04.14.13.0-32.35~16.04.14.13.0-36.40~16.04.14.13.0-37.42~16.04.14.13.0-38.43~16.04.14.13.0-39.44~16.04.14.13.0-41.46~16.04.14.13.0-43.48~16.04.14.13.0-45.50~16.04.1 |
4.15.0-24.26~16.04.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-5703 is a critical vulnerability (CVSS 9.8) in Linux Kernel, published January 16, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.63%, the 85th percentile. Fixed in linux 4.15.11-1.
References
groups.google.com/d/msg/syzkaller-bugs/0PBeVnSzfqQ/5eXAlM46BQAJ
nvd.nist.gov/vuln/detail/CVE-2018-5703
github.com/advisories/GHSA-jc32-3h2c-hmcc
security-tracker.debian.org/tracker/CVE-2018-5703
ubuntu.com/security/CVE-2018-5703
lkml.org/lkml/2018/1/16/53
patchwork.ozlabs.org/patch/801530
cve.org/CVERecord?id=CVE-2018-5703