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CVE-2011-2695

4.9 · MEDIUM

Multiple off-by-one errors in the ext4 subsystem in the Linux kernel before 3.0-rc5 allow local users to cause a denial of service (BUG_ON and system crash) by accessing a sparse file in extent for…

Published Jul 28, 2011linuxCWE-193EPSS 0.45%

Overview

CVE-2011-2695 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 28, 2011 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Multiple off-by-one errors in the ext4 subsystem in the Linux kernel before 3.0-rc5 allow local users to cause a denial of service (BUG_ON and system crash) by accessing a sparse file in extent format with a write operation involving a block number corresponding to the largest possible 32-bit unsigned integer.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 0, < 3.0Affected

References

Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f17722f917b2f21497deb6edc62fb1683daa08e6Refsecunia.com/advisories/45193Refwww.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.0-rc5Refwww.openwall.com/lists/oss-security/2011/07/15/7Refwww.openwall.com/lists/oss-security/2011/07/15/8Refwww.spinics.net/lists/linux-ext4/msg25697.htmlRefbugzilla.redhat.com/show_bug.cgi?id=722557Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f17722f917b2f21497deb6edc62fb1683daa08e6Refsecunia.com/advisories/45193Refwww.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.0-rc5

How CyberStrike helps

Frequently asked questions

What is CVE-2011-2695?

CVE-2011-2695 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 28, 2011 and has a CVSS 2.0 base score of 4.9 (MEDIUM).

How severe is CVE-2011-2695?

This vulnerability has a CVSS 2.0 base score of 4.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-2695?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-2695?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-2695 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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