# CVE-2024-34459: Memory corruption in n/a

> A buffer over-read in libxml2's xmllint tool can cause a crash when formatting HTML error messages, requiring an upgrade to patched versions.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 May 2024
- **Updated:** 15 Oct 2026
- **Also known as:** ALPINE-CVE-2024-34459, ALSA-2026:26354, ALSA-2026:28234, ALSA-2026:28254, AZL-42019, AZL-42027, BELL-CVE-2024-34459, DEBIAN-CVE-2024-34459, ECHO-8b77-066d-6b10, GHSA-vv62-jfwq-693v, JLSEC-2025-84, MGASA-2024-0211, OESA-2024-1641, RHSA-2026:26354, RHSA-2026:27736, RHSA-2026:27737, RHSA-2026:27739, RHSA-2026:28234, RHSA-2026:28254, RHSA-2026:33632, RHSA-2026:33633, RHSA-2026:33634, RHSA-2026:33635, RLSA-2026:26354, RLSA-2026:28234, RLSA-2026:28254, SUSE-SU-2024:2267-1, SUSE-SU-2024:2279-1, SUSE-SU-2024:2288-1, SUSE-SU-2024:2290-1, SUSE-SU-2025:20043-1, UBUNTU-CVE-2024-34459, openSUSE-SU-2024:13971-1

## What is CVE-2024-34459?

CVE-2024-34459 is a high-severity memory corruption vulnerability in Xmlsoft Libxml2, published on 13 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in xmllint (from libxml2) before 2.11.8 and 2.12.x before 2.12.7. Formatting error messages with xmllint --htmlout can result in a buffer over-read in xmlHTMLPrintFileContext in xmllint.c.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2024-34459?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `libxml2` | AlmaLinux:10 | All versions | 2.12.5-10.el10_2.1 |
| `libxml2-devel` | AlmaLinux:10 | All versions | 2.12.5-10.el10_2.1 |
| `libxml2-static` | AlmaLinux:10 | All versions | 2.12.5-10.el10_2.1 |
| `python3-libxml2` | AlmaLinux:10 | All versions | 2.12.5-10.el10_2.1 |
| `libxml2` | AlmaLinux:8 | All versions | 2.9.7-21.el8_10.5 |
| `libxml2-devel` | AlmaLinux:8 | All versions | 2.9.7-21.el8_10.5 |
| `python3-libxml2` | AlmaLinux:8 | All versions | 2.9.7-21.el8_10.5 |
| `libxml2` | AlmaLinux:9 | All versions | 2.9.13-14.el9_8.1 |
| `libxml2-devel` | AlmaLinux:9 | All versions | 2.9.13-14.el9_8.1 |
| `python3-libxml2` | AlmaLinux:9 | All versions | 2.9.13-14.el9_8.1 |
| `libxml2` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.12.5-10.el10_2.1 |
| `libxml2-debuginfo` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.12.5-10.el10_2.1 |
| `libxml2-debugsource` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.12.5-10.el10_2.1 |
| `libxml2-devel` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.12.5-10.el10_2.1 |
| `libxml2-static` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.12.5-10.el10_2.1 |
| `python3-libxml2` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.12.5-10.el10_2.1 |
| `python3-libxml2-debuginfo` | Red Hat:enterprise_linux:10.2 | All versions | 0:2.12.5-10.el10_2.1 |
| `libxml2-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.9.7-21.el8_10.5 |
| `libxml2-debugsource` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.9.7-21.el8_10.5 |
| `libxml2-devel` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.9.7-21.el8_10.5 |
| `python3-libxml2-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:2.9.7-21.el8_10.5 |
| `libxml2` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.9.7-21.el8_10.5 |
| `libxml2-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.9.7-21.el8_10.5 |
| `libxml2-debugsource` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.9.7-21.el8_10.5 |
| `python3-libxml2` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.9.7-21.el8_10.5 |
| `python3-libxml2-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:2.9.7-21.el8_10.5 |
| `libxml2-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:2.9.13-14.el9_8.1 |
| `libxml2-debugsource` | Red Hat:enterprise_linux:9::appstream | All versions | 0:2.9.13-14.el9_8.1 |
| `libxml2-devel` | Red Hat:enterprise_linux:9::appstream | All versions | 0:2.9.13-14.el9_8.1 |
| `python3-libxml2-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:2.9.13-14.el9_8.1 |
| `libxml2` | Red Hat:enterprise_linux:9::baseos | All versions | 0:2.9.13-14.el9_8.1 |
| `libxml2-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:2.9.13-14.el9_8.1 |
| `libxml2-debugsource` | Red Hat:enterprise_linux:9::baseos | All versions | 0:2.9.13-14.el9_8.1 |
| `python3-libxml2` | Red Hat:enterprise_linux:9::baseos | All versions | 0:2.9.13-14.el9_8.1 |
| `python3-libxml2-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:2.9.13-14.el9_8.1 |
| `libxml2` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.12.5-9.el10_0.1 |
| `libxml2-debuginfo` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.12.5-9.el10_0.1 |
| `libxml2-debugsource` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.12.5-9.el10_0.1 |
| `libxml2-devel` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.12.5-9.el10_0.1 |
| `libxml2-static` | Red Hat:enterprise_linux_eus:10.0 | All versions | 0:2.12.5-9.el10_0.1 |

Products: Xmlsoft Libxml2.

## How do I fix CVE-2024-34459?

Upgrade to a fixed version.

## Is CVE-2024-34459 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-34459 exists.

## Other vulnerabilities in Xmlsoft Libxml2

- [CVE-2017-16931](https://insights.sbomify.com/CVE-2017-16931/): XML external entity in n/a (critical 9.8)
- [CVE-2017-8872](https://insights.sbomify.com/CVE-2017-8872/): Information disclosure in n/a (critical 9.1)
- [CVE-2022-49043](https://insights.sbomify.com/CVE-2022-49043/): Use after free in libxml2 (high 8.1)
- [CVE-2026-86140](https://insights.sbomify.com/CVE-2026-86140/): Memory corruption in libxml2 (high 8.0)
- [CVE-2024-25062](https://insights.sbomify.com/CVE-2024-25062/): Use after free in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-34459 and fix it if it is affected.

What it is: CVE-2024-34459 is a high-severity memory corruption vulnerability in Xmlsoft Libxml2, published on 13 May 2024. 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-2024-34459 exists.

Affected product: Xmlsoft Libxml2. 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-2024-34459/ (Markdown: https://insights.sbomify.com/CVE-2024-34459/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-34459
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-34459
- OSV: https://osv.dev/vulnerability/CVE-2024-34459

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-34459/
Summaries are generated and may contain mistakes; the official description above is the record.