CVE-2001-1056 Security feature bypass in n/a

What is CVE-2001-1056?

CVE-2001-1056 is a high-severity vulnerability in Linux kernel, published on 9 Mar 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

IRC DCC helper in the ip_masq_irc IP masquerading module 2.2 allows remote attackers to bypass intended firewall restrictions by causing the target system to send a "DCC SEND" request to a malicious server which listens on port 6667, which may cause the module to believe that the traffic is a valid request and allow the connection to the port specified in the DCC SEND request.

Which versions are affected by CVE-2001-1056?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2001-1056?

No fix has been published for CVE-2001-1056 yet. Limit exposure of the affected software until one is available.

Is CVE-2001-1056 being exploited?

There is no known exploitation of CVE-2001-1056 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-jqp9-rhpg-wv3f.