What is CVE-2011-3363?

CVE-2011-3363 is a medium-severity vulnerability in Linux Kernel, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2012-05-24.

How severe is CVE-2011-3363?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Linux Kernel

CVE-2011-3363

The setup_cifs_sb function in fs/cifs/connect.c in the Linux kernel before 2.6.39 does not properly handle DFS referrals, which allows remote CIFS servers to cause a denial of service (system crash) by placing a referral at the root of a share.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2012-05-24 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: -0.000

Affected products

Linux Kernel
Red Hat Enterprise Linux — versions 4.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.openwall.com/lists/oss-security/2011/09/14/12 (mailing-list, Patch, Mailing List, Third Party Advisory)
github.com/torvalds/linux/commit/70945643722ffeac779d2529a348f99567fa5c33 (Patch, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 (Broken Link)
git.kernel.org/

Frequently asked questions

What is CVE-2011-3363?: CVE-2011-3363 is a medium-severity vulnerability in Linux Kernel, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2012-05-24.
How severe is CVE-2011-3363?: Medium severity. CVSS v3 base score is 6.5 out of 10.