CVE-2009-2695 Privilege escalation in n/a

What is CVE-2009-2695?

CVE-2009-2695 is a high-severity vulnerability in Linux kernel, published on 28 Aug 2009. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The Linux kernel before 2.6.31-rc7 does not properly prevent mmap operations that target page zero and other low memory addresses, which allows local users to gain privileges by exploiting NULL pointer dereference vulnerabilities, related to (1) the default configuration of the allow_unconfined_mmap_low boolean in SELinux on Red Hat Enterprise Linux (RHEL) 5, (2) an error that causes allow_unconfined_mmap_low to be ignored in the unconfined_t domain, (3) lack of a requirement for the CAP_SYS_RAWIO capability for these mmap operations, and (4) interaction between the mmap_min_addr protection mechanism and certain application programs.

Weakness: CWE-119

Which versions are affected by CVE-2009-2695?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2009-2695?

Apply the vendor's patch.

Is CVE-2009-2695 being exploited?

There is no known exploitation of CVE-2009-2695 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-jh8r-4ff3-92j9.