# CVE-2026-1485: Glib: glib: local denial of service via buffer underflow in content type parsing

> A local attacker can cause denial of service in applications using Glib by providing a crafted treemagic file that triggers a buffer underflow via integer wraparound.

- **Severity:** Low 2.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 27 Jan 2026
- **Updated:** 18 Mar 2026
- **Also known as:** BELL-CVE-2026-1485, DEBIAN-CVE-2026-1485, ECHO-9546-a6bf-a698, GHSA-xc99-2v4m-jv2w, UBUNTU-CVE-2026-1485

## What is CVE-2026-1485?

CVE-2026-1485 is a low-severity vulnerability in Red Hat Enterprise Linux 10, published on 27 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A flaw was found in Glib's content type parsing logic. This buffer underflow vulnerability occurs because the length of a header line is stored in a signed integer, which can lead to integer wraparound for very large inputs. This results in pointer underflow and out-of-bounds memory access. Exploitation requires a local user to install or process a specially crafted treemagic file, which can lead to local denial of service or application instability.

Weakness: CWE-124 (Buffer Underwrite)

## Which versions are affected by CVE-2026-1485?


## How do I fix CVE-2026-1485?

Apply the vendor's patch.

## Is CVE-2026-1485 being exploited?

There is no known exploitation of CVE-2026-1485 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1485 and fix it if it is affected.

What it is: CVE-2026-1485 is a low-severity vulnerability in Red Hat Enterprise Linux 10, published on 27 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-1485 in the wild and no public exploit code.

Affected product: Red Hat Enterprise Linux 10. 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-2026-1485/ (Markdown: https://insights.sbomify.com/CVE-2026-1485/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1485
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1485
- OSV: https://osv.dev/vulnerability/CVE-2026-1485

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1485/
Summaries are generated and may contain mistakes; the official description above is the record.