CVE-2011-1771 Null dereference in n/a

What is CVE-2011-1771?

CVE-2011-1771 is a high-severity vulnerability in Linux kernel, published on 6 Sep 2011. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The cifs_close function in fs/cifs/file.c in the Linux kernel before 2.6.39 allows local users to cause a denial of service (NULL pointer dereference and BUG) or possibly have unspecified other impact by setting the O_DIRECT flag during an attempt to open a file on a CIFS filesystem.

Weakness: CWE-476

Which versions are affected by CVE-2011-1771?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2011-1771?

Upgrade to a fixed version.

Is CVE-2011-1771 being exploited?

There is no known exploitation of CVE-2011-1771 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-68xv-2p42-wm3q.