CVE-2018-10938

Severity: medium (CVSS 5.9 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-08-27 · updated 2026-06-17
Weakness: CWE-835

Description

A flaw was found in the Linux kernel present since v4.0-rc1 and through v4.13-rc4. A crafted network packet sent remotely by an attacker may force the kernel to enter an infinite loop in the cipso_v4_optptr() function in net/ipv4/cipso_ipv4.c leading to a denial-of-service. A certain non-default configuration of LSM (Linux Security Module) and NetLabel should be set up on a system before an attacker could leverage this flaw.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04
Debian Linux: 9.0
Linux kernel: 4.0, 4.0-rc1, 4.0-rc2, 4.0-rc3, 4.0-rc4, 4.0-rc5 (+109)

References

http://seclists.org/oss-sec/2018/q3/179
http://www.securityfocus.com/bid/105154
http://www.securitytracker.com/id/1041569
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10938
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=40413955ee265a5e42f710940ec78f5450d49149
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
https://usn.ubuntu.com/3797-1/
https://usn.ubuntu.com/3797-2/
https://www.debian.org/security/2018/dsa-4308
http://seclists.org/oss-sec/2018/q3/179
http://www.securityfocus.com/bid/105154
http://www.securitytracker.com/id/1041569

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