CVE-2012-2100 Integer overflow in n/a
High 7.1
Published
Updated
Check this codebase for CVE-2012-2100 and fix it if it is affected.
What it is: CVE-2012-2100 is a high-severity vulnerability in Linux kernel, published on 3 Jul 2012. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2012-2100 in the wild and no public exploit code.
Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2012-2100/ (Markdown: https://insights.sbomify.com/CVE-2012-2100/index.md)
A malformed ext4 filesystem can trigger an integer overflow in the Linux kernel, allowing attackers to cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2012-2100?
CVE-2012-2100 is a high-severity vulnerability in Linux kernel, published on 3 Jul 2012. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 3.2.2, on the x86 platform and unspecified other platforms, allows user-assisted remote attackers to trigger inconsistent filesystem-groups data and possibly cause a denial of service via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value). NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4307.
Weakness: CWE-189
Which versions are affected by CVE-2012-2100?
It affects 1 product.
Linux distribution packages (33)
kernel Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-PAE Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-PAE-debuginfo Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-PAE-devel Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debug Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debug-debuginfo Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debug-devel Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debuginfo Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debuginfo-common Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-devel Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-doc Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-headers Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-xen Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-xen-debuginfo Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel-xen-devel Red Hat:enterprise_linux:5::client | All versions | 0:2.6.18-308.20.1.el5 |
kernel Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-PAE Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-PAE-debuginfo Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-PAE-devel Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debug Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debug-debuginfo Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debug-devel Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debuginfo Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-debuginfo-common Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-devel Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-doc Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-headers Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-kdump Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-kdump-debuginfo Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-kdump-devel Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-xen Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-xen-debuginfo Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
kernel-xen-devel Red Hat:enterprise_linux:5::server | All versions | 0:2.6.18-308.20.1.el5 |
Products include Linux kernel.
How do I fix CVE-2012-2100?
Apply the vendor's patch.
Is CVE-2012-2100 being exploited?
There is no known exploitation of CVE-2012-2100 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-cx5x-f2xm-m2cr, RHSA-2012:1445.