# CVE-2024-2398: HTTP/2 push headers memory-leak

> A memory leak in libcurl when aborting HTTP/2 server push due to header limits can lead to resource exhaustion and denial of service.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 27 Mar 2024
- **Updated:** 15 Oct 2026
- **Also known as:** ALPINE-CVE-2024-2398, ALSA-2024:5529, ALSA-2024:5654, AZL-37069, AZL-37078, AZL-37088, AZL-37101, BELL-CVE-2024-2398, CLEANSTART-2026-PK50188, CLSA-2024-1712672178, CLSA-2024-1712836996, CLSA-2024-1712837577, CLSA-2024-1712837675, CLSA-2024-1713333661, CLSA-2024-1724788603, CURL-CVE-2024-2398, DEBIAN-CVE-2024-2398, ECHO-2317-d493-5988, GHSA-mq8w-c2j9-rqxc, JLSEC-2026-416, OESA-2024-1412, OESA-2024-1480, RHSA-2024:3998, RHSA-2024:5529, RHSA-2024:5654, RLSA-2024:5654, ROOT-OS-ALPINE-315-CVE-2024-2398, UBUNTU-CVE-2024-2398, USN-6718-2

## What is CVE-2024-2398?

CVE-2024-2398 is a high-severity denial of service vulnerability in Apple Macos, published on 27 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead leaks the memory.  Further, this error condition fails silently and is therefore not easily detected by an application.

Weakness: CWE-772 (Missing Release of Resource after Effective Lifetime)

## Which versions are affected by CVE-2024-2398?

It affects 14 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `curl` | AlmaLinux:8 | All versions | 7.61.1-34.el8_10.2 |
| `libcurl` | AlmaLinux:8 | All versions | 7.61.1-34.el8_10.2 |
| `libcurl-devel` | AlmaLinux:8 | All versions | 7.61.1-34.el8_10.2 |
| `libcurl-minimal` | AlmaLinux:8 | All versions | 7.61.1-34.el8_10.2 |
| `curl` | AlmaLinux:9 | All versions | 7.76.1-29.el9_4.1 |
| `curl-minimal` | AlmaLinux:9 | All versions | 7.76.1-29.el9_4.1 |
| `libcurl` | AlmaLinux:9 | All versions | 7.76.1-29.el9_4.1 |
| `libcurl-devel` | AlmaLinux:9 | All versions | 7.76.1-29.el9_4.1 |
| `libcurl-minimal` | AlmaLinux:9 | All versions | 7.76.1-29.el9_4.1 |
| `curl` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `curl-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `curl-debugsource` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `curl-minimal-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `libcurl` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `libcurl-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `libcurl-devel` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `libcurl-minimal` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `libcurl-minimal-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:7.61.1-34.el8_10.2 |
| `curl-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:7.76.1-29.el9_4.1 |
| `curl-debugsource` | Red Hat:enterprise_linux:9::appstream | All versions | 0:7.76.1-29.el9_4.1 |
| `curl-minimal-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:7.76.1-29.el9_4.1 |
| `libcurl-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:7.76.1-29.el9_4.1 |
| `libcurl-devel` | Red Hat:enterprise_linux:9::appstream | All versions | 0:7.76.1-29.el9_4.1 |
| `libcurl-minimal-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:7.76.1-29.el9_4.1 |
| `curl` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `curl-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `curl-debugsource` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `curl-minimal` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `curl-minimal-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `libcurl` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `libcurl-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `libcurl-minimal` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `libcurl-minimal-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:7.76.1-29.el9_4.1 |
| `curl-debuginfo` | Red Hat:rhel_eus:9.2::appstream | All versions | 0:7.76.1-23.el9_2.7 |
| `curl-debugsource` | Red Hat:rhel_eus:9.2::appstream | All versions | 0:7.76.1-23.el9_2.7 |
| `curl-minimal-debuginfo` | Red Hat:rhel_eus:9.2::appstream | All versions | 0:7.76.1-23.el9_2.7 |
| `libcurl-debuginfo` | Red Hat:rhel_eus:9.2::appstream | All versions | 0:7.76.1-23.el9_2.7 |
| `libcurl-devel` | Red Hat:rhel_eus:9.2::appstream | All versions | 0:7.76.1-23.el9_2.7 |
| `libcurl-minimal-debuginfo` | Red Hat:rhel_eus:9.2::appstream | All versions | 0:7.76.1-23.el9_2.7 |
| `curl` | Red Hat:rhel_eus:9.2::baseos | All versions | 0:7.76.1-23.el9_2.7 |

Products: Apple Macos, Fedoraproject Fedora, Haxx Curl, Netapp Active Iq Unified Manager, Netapp Bootstrap Os, Netapp Brocade Fabric Operating System, Netapp H300s Firmware, Netapp H410s Firmware, Netapp H500s Firmware, Netapp H610c Firmware, Netapp H610s Firmware, Netapp H615c Firmware, Netapp H700s Firmware, Netapp Ontap Select Deploy Administration Utility.

## How do I fix CVE-2024-2398?

Upgrade to a fixed version.

## Is CVE-2024-2398 being exploited?

There is no known exploitation of CVE-2024-2398 in the wild and no public exploit code.

## Other vulnerabilities in Apple Macos

- [CVE-2026-65400](https://insights.sbomify.com/CVE-2026-65400/): Apple macOS Improper Authentication (critical 9.8, exploited in the wild)
- [CVE-2024-44146](https://insights.sbomify.com/CVE-2024-44146/): Security feature bypass in macOS (critical 10.0)
- [CVE-2024-44148](https://insights.sbomify.com/CVE-2024-44148/): Security feature bypass in macOS (critical 10.0)
- [CVE-2023-38586](https://insights.sbomify.com/CVE-2023-38586/): Security feature bypass in macOS (critical 10.0)
- [CVE-2023-40455](https://insights.sbomify.com/CVE-2023-40455/): Security feature bypass in macOS (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-2398 and fix it if it is affected.

What it is: CVE-2024-2398 is a high-severity denial of service vulnerability in Apple Macos, published on 27 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-2398 in the wild and no public exploit code.

Affected product: Apple Macos. 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-2024-2398/ (Markdown: https://insights.sbomify.com/CVE-2024-2398/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-2398
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-2398
- OSV: https://osv.dev/vulnerability/CVE-2024-2398

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-2398/
Summaries are generated and may contain mistakes; the official description above is the record.