CVE-2011-1093 Null dereference in n/a

What is CVE-2011-1093?

CVE-2011-1093 is a high-severity vulnerability in Linux kernel, published on 18 Jul 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The dccp_rcv_state_process function in net/dccp/input.c in the Datagram Congestion Control Protocol (DCCP) implementation in the Linux kernel before 2.6.38 does not properly handle packets for a CLOSED endpoint, which allows remote attackers to cause a denial of service (NULL pointer dereference and OOPS) by sending a DCCP-Close packet followed by a DCCP-Reset packet.

Weakness: CWE-476

Which versions are affected by CVE-2011-1093?

It affects 6 products.

Products include Linux kernel, Redhat Enterprise Linux Aus, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

How do I fix CVE-2011-1093?

Upgrade to a fixed version.

Is CVE-2011-1093 being exploited?

There is no known exploitation of CVE-2011-1093 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-rf9x-2w4m-rh77.