CVE-2011-3363

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-05-24 · updated 2026-06-16
Weakness: CWE-20

Description

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.

Affected products

Linux kernel: before 2.6.39 — fixed in 2.6.39
Red Hat Enterprise Linux: 4.0

How to fix

Upgrade to a fixed version: Linux kernel 2.6.39. Check the vendor advisory for mitigations.

References

http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=70945643722ffeac779d2529a348f99567fa5c33
http://www.openwall.com/lists/oss-security/2011/09/14/12
https://bugzilla.redhat.com/show_bug.cgi?id=738291
https://github.com/torvalds/linux/commit/70945643722ffeac779d2529a348f99567fa5c33
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=70945643722ffeac779d2529a348f99567fa5c33
http://www.openwall.com/lists/oss-security/2011/09/14/12
https://bugzilla.redhat.com/show_bug.cgi?id=738291
https://github.com/torvalds/linux/commit/70945643722ffeac779d2529a348f99567fa5c33

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