# CVE-2026-34253: Memory corruption in n/a

> A buffer underflow in the ogg123 utility allows attackers to cause crashes or execute arbitrary code via malformed input.

- **Severity:** High 8.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 May 2026
- **Updated:** 15 Jul 2026
- **Also known as:** AZL-87002, DEBIAN-CVE-2026-34253, GHSA-45fh-4474-xc77, MGASA-2026-0297, OESA-2026-2375, OESA-2026-2376, OESA-2026-2377, OESA-2026-2378, OESA-2026-2486, SUSE-SU-2026:3114-1, SUSE-SU-2026:3115-1, UBUNTU-CVE-2026-34253, openSUSE-SU-2026:10904-1, openSUSE-SU-2026:20891-1

## What is CVE-2026-34253?

CVE-2026-34253 is a high-severity memory corruption vulnerability in n/a, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A buffer underflow vulnerability has been identified in the ogg123 utility from the vorbis-tools 1.4.3 package in function remotethread in remote.c. This vulnerability occurs in the remote control functionality when processing malformed input, leading to a stack buffer underflow that can cause application crashes and potentially allow code execution.

Weakness: CWE-124 (Buffer Underwrite)

## Which versions are affected by CVE-2026-34253?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `vorbis-tools` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | All versions | 1.4.0-150000.3.6.1 |
| `vorbis-tools` | SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 1.4.0-27.6.1 |
| `vorbis-tools` | openSUSE:Tumbleweed | All versions | 1.4.3-2.1 |

## How do I fix CVE-2026-34253?

Apply the vendor's patch.

## Is CVE-2026-34253 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34253 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34253 and fix it if it is affected.

What it is: CVE-2026-34253 is a high-severity memory corruption vulnerability in n/a, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34253 exists.

Affected product: n/a. 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-2026-34253/ (Markdown: https://insights.sbomify.com/CVE-2026-34253/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34253
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34253
- OSV: https://osv.dev/vulnerability/CVE-2026-34253

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34253/
Summaries are generated and may contain mistakes; the official description above is the record.