What’s Vulnerable › Vulnerabilities

CVE-2019-17133

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-10-04 · updated 2026-06-17
• Weakness: CWE-120

Description

In the Linux kernel through 5.3.2, cfg80211_mgd_wext_giwessid in net/wireless/wext-sme.c does not reject a long SSID IE, leading to a Buffer Overflow.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 19.04
• Debian Linux: 8.0
• Linux kernel: from 2.6.32 before 3.16.77; from 3.17 before 4.4.198; from 4.5 before 4.9.198; from 4.10 before 4.14.151; from 4.15 before 4.19.81; from 4.20 before 5.3.8 — fixed in 3.16.77, 4.14.151, 4.19.81, 4.4.198, 4.9.198, 5.3.8
• openSUSE Leap: 15.1

How to fix

Upgrade to a fixed version: Linux kernel 3.16.77, 4.14.151, 4.19.81, 4.4.198. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00064.html
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00010.html
• http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
• https://access.redhat.com/errata/RHSA-2020:0174
• https://access.redhat.com/errata/RHSA-2020:0374
• https://access.redhat.com/errata/RHSA-2020:0375
• https://access.redhat.com/errata/RHSA-2020:0543
• https://access.redhat.com/errata/RHSA-2020:0592
• https://access.redhat.com/errata/RHSA-2020:0609
• https://access.redhat.com/errata/RHSA-2020:0653
• https://access.redhat.com/errata/RHSA-2020:0661
• https://access.redhat.com/errata/RHSA-2020:0664

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