# CVE-2026-24799: A heap-based buffer over-read or buffer overflow in davisking/dlib

> A heap-based buffer overflow in dlib's zlib module allows attackers to execute arbitrary code or cause denial of service via crafted input.

- **Severity:** Medium 5.2 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:L/SA:L/S:N/AU:Y/R:U/V:C/RE:L/U:Amber`)
- **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:** 27 Jan 2026
- **Also known as:** AZL-75818, AZL-75824, AZL-75827, AZL-75833, AZL-75839, AZL-75842, GHSA-9549-fwq2-p6hg, openSUSE-SU-2026:12269-1

## What is CVE-2026-24799?

CVE-2026-24799 is a medium-severity memory corruption vulnerability in davisking dlib, 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

Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in davisking dlib (dlib/external/zlib modules). This vulnerability is associated with program files inflate.C.

This issue affects dlib: before v19.24.9.

Weakness: CWE-787 (Out-of-bounds Write), CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2026-24799?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `dlib` | openSUSE:Tumbleweed | All versions | 20.0.1-1.1 |

## How do I fix CVE-2026-24799?

Upgrade to a fixed version.

## Is CVE-2026-24799 being exploited?

There is no known exploitation of CVE-2026-24799 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-24799 and fix it if it is affected.

What it is: CVE-2026-24799 is a medium-severity memory corruption vulnerability in davisking dlib, 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-2026-24799 in the wild and no public exploit code.

Affected product: davisking dlib. 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-2026-24799/ (Markdown: https://insights.sbomify.com/CVE-2026-24799/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-24799
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-24799
- OSV: https://osv.dev/vulnerability/CVE-2026-24799

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-24799/
Summaries are generated and may contain mistakes; the official description above is the record.