CVE-2017-18017
9.8
CRITICAL
CVSS 3.1
EPSS 52.2%
Description
The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before 4.11, and 4.9.x before 4.9.36, allows remote attackers to cause a denial of service (use-after-free and memory corruption) or possibly have unspecified other impact by leveraging the presence of xt_TCPMSS in an iptables action.
How to fix CVE-2017-18017
To remediate CVE-2017-18017, upgrade the affected package to a fixed version below.
- Debian/linux—upgrade to 4.11.6-1 or later
Is CVE-2017-18017 being exploited?
Likely — EPSS is 52.2%, placing CVE-2017-18017 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- from 0, < 4.11.6-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |