# CVE-2024-35823: vt: fix unicode buffer corruption when deleting characters

> A memory corruption vulnerability in the Linux kernel VT subsystem allows attackers to cause buffer corruption, potentially leading to system crashes or code execution.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 May 2024
- **Updated:** 15 Oct 2026
- **Also known as:** BELL-CVE-2024-35823, DEBIAN-CVE-2024-35823, GHSA-7jj8-vg94-4wqj, UBUNTU-CVE-2024-35823

## What is CVE-2024-35823?

CVE-2024-35823 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 17 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In the Linux kernel, the following vulnerability has been resolved:

vt: fix unicode buffer corruption when deleting characters

This is the same issue that was fixed for the VGA text buffer in commit
39cdb68c64d8 ("vt: fix memory overlapping when deleting chars in the
buffer"). The cure is also the same i.e. replace memcpy() with memmove()
due to the overlaping buffers.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2024-35823?

It affects 2 products.


Products: Debian Debian Linux, Linux kernel.

## How do I fix CVE-2024-35823?

Apply the vendor's patch.

## Is CVE-2024-35823 being exploited?

There is no known exploitation of CVE-2024-35823 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-35823 and fix it if it is affected.

What it is: CVE-2024-35823 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 17 May 2024. 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-2024-35823 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2024-35823/ (Markdown: https://insights.sbomify.com/CVE-2024-35823/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-35823
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-35823
- OSV: https://osv.dev/vulnerability/CVE-2024-35823

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-35823/
Summaries are generated and may contain mistakes; the official description above is the record.