CVE-2026-59250: Classic buffer overflow in the Erlang/OTP megaco flex scanner C driver allows a remote unauthenticated attacke

This month

HIGH 8.3REMOTE

CVE-2026-59250 is a high-severity flaw (CVSS 8.3) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Classic buffer overflow in the Erlang/OTP megaco flex scanner C driver allows a remote unauthenticated attacker to corrupt the driver's memory (and potentially achieve remote code execution or a denial-of-service crash) by sending a single text-encoded H.248/Megaco message containing an oversized property parm name. When tokenizing a Local/Remote descriptor, mfs_load_property_groups extracts the attacker-controlled property name (bounded only by

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-120, CWE-787
Published	2026-07-27
Last modified	2026-10-24

Publisher (CNA): EEF

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-07-27 16:18 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

Ubuntu 20.04 · erlang · FIXED · 1:22.2.7+dfsg-1ubuntu0.5+esm2

sudo apt update && sudo apt install --only-upgrade erlang dpkg --compare-versions "$(dpkg-query -W -f='${Version}' erlang)" ge "1:22.2.7+dfsg-1ubuntu0.5+esm2" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 22.04 · erlang · FIXED · 1:24.2.1+dfsg-1ubuntu0.7

sudo apt update && sudo apt install --only-upgrade erlang dpkg --compare-versions "$(dpkg-query -W -f='${Version}' erlang)" ge "1:24.2.1+dfsg-1ubuntu0.7" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 24.04 · erlang · FIXED · 1:25.3.2.8+dfsg-1ubuntu4.7

sudo apt update && sudo apt install --only-upgrade erlang dpkg --compare-versions "$(dpkg-query -W -f='${Version}' erlang)" ge "1:25.3.2.8+dfsg-1ubuntu4.7" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · erlang · NO FIX YET

Debian 13 · erlang · FIXED · 1:27.3.4.1+dfsg-1+deb13u3

sudo apt update && sudo apt install --only-upgrade erlang dpkg --compare-versions "$(dpkg-query -W -f='${Version}' erlang)" ge "1:27.3.4.1+dfsg-1+deb13u3" && echo PATCHED || echo STILL-VULNERABLE

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: cna.erlef.org/cves/CVE-2026-59250.html

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59250?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-59250 being exploited?

CVE-2026-59250 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59250 affect?

CVE-2026-59250 affects affected software. Severity is high (CVSS 8.3). Classic buffer overflow in the Erlang/OTP megaco flex scanner C driver allows a remote unauthenticated attacker to corrupt the driver's memory (and potentially achieve remote code execution or a denial-of-service crash) by sending a single

How urgent is CVE-2026-59250?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs