# CVE-2026-15712: Memory corruption in Red Hat Enterprise Linux 10

> A remote attacker can cause a denial of service or expose memory contents by sending a malformed HTTP/2 GOAWAY frame to applications using libsoup.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** AZL-92409, DEBIAN-CVE-2026-15712, ECHO-b2ac-84d5-8c29, GHSA-9fmg-hf32-22c3, UBUNTU-CVE-2026-15712

## What is CVE-2026-15712?

CVE-2026-15712 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A heap buffer over-read vulnerability was discovered in libsoup's (versions: libsoup 3.0 to 3.7.0) HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the "Additional Debug Data" payload by assuming the data stream is a safely NUL-terminated C-string. Because the parser lacks strict length-boundary verification before reading this data, a remote, unauthenticated attacker can intentionally send a malformed GOAWAY frame missing the appropriate null delimiter. This causes the library to read past the end of the allocated buffer, triggering an application crash that results in a denial of service (DoS), or potentially exposing fragments of memory contents.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-15712?


## How do I fix CVE-2026-15712?

Upgrade to a fixed version.

## Is CVE-2026-15712 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15712 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15712 and fix it if it is affected.

What it is: CVE-2026-15712 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 14 Jul 2026. 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-2026-15712 exists.

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-2026-15712/ (Markdown: https://insights.sbomify.com/CVE-2026-15712/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15712
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15712
- OSV: https://osv.dev/vulnerability/CVE-2026-15712

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15712/
Summaries are generated and may contain mistakes; the official description above is the record.