---
id: "CVE-2026-104596"
kind: "vulnerability"
aliases: ["CVE-2026-104596"]
title: "libosmocore: out-of-bounds reads in GSM supplementary-service parsers leak data"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gsm", "libosmocore", "package", "self-hosted", "telecom"]
not_affected_if: ["no-gsm-04.80-parsing"]
published_at: "2026-10-26T20:17:37+00:00"
first_seen_at: "2026-10-26T20:50:17+00:00"
updated_at: "2026-10-26T20:52:03+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104596", "first_seen_at": "2026-10-26T20:50:17+00:00"}]
---

# libosmocore: out-of-bounds reads in GSM supplementary-service parsers leak data

libosmocore through 1.14.1 has out-of-bounds reads in the GSM 04.80 supplementary-service component parsers in src/gsm/gsm0480.c. A remote attacker can use crafted input to read memory outside the buffer and obtain sensitive information.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed libosmocore version with `pkg-config --modversion libosmocore` or the package manager; unknown whether a specific build is confirmed vulnerable beyond `1.14.1` and earlier.

## Fix

- Move to a libosmocore release newer than `1.14.1`; the sources do not name the fixed version.

## Timeline

- 2026-10-26T20:50:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104596

## From the sources

libosmocore through 1.14.1 contains out-of-bounds reads in the GSM 04.80 supplementary-service component parsers in src/gsm/gsm0480.c. This allows a remote attacker to obtain sensitive information.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_