CVE-2018-1066

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-03-02 · updated 2026-06-17
Weakness: CWE-476

Description

The Linux kernel before version 4.11 is vulnerable to a NULL pointer dereference in fs/cifs/cifsencrypt.c:setup_ntlmv2_rsp() that allows an attacker controlling a CIFS server to kernel panic a client that has this server mounted, because an empty TargetInfo field in an NTLMSSP setup negotiation response is mishandled during session recovery.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04
Debian Linux: 8.0, 9.0
Linux kernel: through 4.10.15

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cabfb3680f78981d26c078a26e5c748531257ebb
http://www.securityfocus.com/bid/103378
https://bugzilla.redhat.com/show_bug.cgi?id=1539599
https://github.com/torvalds/linux/commit/cabfb3680f78981d26c078a26e5c748531257ebb
https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
https://patchwork.kernel.org/patch/10187633/
https://usn.ubuntu.com/3880-1/
https://usn.ubuntu.com/3880-2/
https://www.debian.org/security/2018/dsa-4187
https://www.debian.org/security/2018/dsa-4188
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cabfb3680f78981d26c078a26e5c748531257ebb

Get alerted when CVE-2018-1066 or the next vulnerability affects your stack