# CVE-2012-2375: Denial of service in n/a

> Remote NFS servers can cause a denial of service in the Linux kernel by sending excessive bitmap words in an ACL reply.

- **Severity:** Medium 4.6 (`AV:A/AC:H/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Jun 2012
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2012-2375, GHSA-fm6c-qqgr-6pr6

## What is CVE-2012-2375?

CVE-2012-2375 is a medium-severity denial of service 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 __nfs4_get_acl_uncached function in fs/nfs/nfs4proc.c in the NFSv4 implementation in the Linux kernel before 3.3.2 uses an incorrect length variable during a copy operation, which allows remote NFS servers to cause a denial of service (OOPS) by sending an excessive number of bitmap words in an FATTR4_ACL reply.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-4131.

Weakness: CWE-189

## Which versions are affected by CVE-2012-2375?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2012-2375?

Upgrade to a fixed version.

## Is CVE-2012-2375 being exploited?

There is no known exploitation of CVE-2012-2375 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2012-2375 and fix it if it is affected.

What it is: CVE-2012-2375 is a medium-severity denial of service 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.
Exploitation: There is no known exploitation of CVE-2012-2375 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-2012-2375/ (Markdown: https://insights.sbomify.com/CVE-2012-2375/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2012-2375
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2012-2375
- OSV: https://osv.dev/vulnerability/CVE-2012-2375

---
From sbomify Insights: https://insights.sbomify.com/CVE-2012-2375/
Summaries are generated and may contain mistakes; the official description above is the record.