CVE-2011-1927 Null dereference in n/a

What is CVE-2011-1927?

CVE-2011-1927 is a medium-severity vulnerability in Linux kernel, published on 13 Jun 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The ip_expire function in net/ipv4/ip_fragment.c in the Linux kernel before 2.6.39 does not properly construct ICMP_TIME_EXCEEDED packets after a timeout, which allows remote attackers to cause a denial of service (invalid pointer dereference) via crafted fragmented packets.

Which versions are affected by CVE-2011-1927?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2011-1927?

No fix has been published for CVE-2011-1927 yet. Limit exposure of the affected software until one is available.

Is CVE-2011-1927 being exploited?

There is no known exploitation of CVE-2011-1927 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-qmg2-c98g-p46x.