# CVE-2011-1148: Use after free in n/a

> Attackers can trigger a use-after-free in PHP's substr_replace function, causing denial of service or potential code execution.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not stated
- **Attackable:** Not stated
- **Victim action needed:** Not stated
- **Fix available:** Yes
- **Published:** 18 Mar 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-w6xh-r634-49c8

## What is CVE-2011-1148?

CVE-2011-1148 is a high-severity use after free vulnerability in Php Php, published on 18 Mar 2011. 

### Official description

Use-after-free vulnerability in the substr_replace function in PHP 5.3.6 and earlier allows context-dependent attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact by using the same variable for multiple arguments.

Weakness: CWE-399

## Which versions are affected by CVE-2011-1148?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2011-1148?

Upgrade to a fixed version.

## Is CVE-2011-1148 being exploited?

There is no known exploitation of CVE-2011-1148 in the wild and no public exploit code.

## Other vulnerabilities in Php Php

- [CVE-2012-2688](https://insights.sbomify.com/CVE-2012-2688/): Integer overflow in n/a (critical 10.0)
- [CVE-2012-2376](https://insights.sbomify.com/CVE-2012-2376/): Memory corruption in n/a (critical 10.0)
- [CVE-2011-3268](https://insights.sbomify.com/CVE-2011-3268/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-4143](https://insights.sbomify.com/CVE-2009-4143/): Other in n/a (critical 10.0)
- [CVE-2008-5557](https://insights.sbomify.com/CVE-2008-5557/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-1148 and fix it if it is affected.

What it is: CVE-2011-1148 is a high-severity use after free vulnerability in Php Php, published on 18 Mar 2011. 
Exploitation: There is no known exploitation of CVE-2011-1148 in the wild and no public exploit code.

Affected product: Php Php. 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-2011-1148/ (Markdown: https://insights.sbomify.com/CVE-2011-1148/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1148
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1148
- OSV: https://osv.dev/vulnerability/CVE-2011-1148

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1148/
Summaries are generated and may contain mistakes; the official description above is the record.