Stack-based buffer overflow in otp - CVE-2026-49759
Published: July 2, 2026
Vulnerability identifier: #VU136817
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-49759
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: erlang
Affected software:
otp
otp
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to stack-based buffer overflow in SCTP error cause parsing in inet_drv.c when processing a crafted SCTP ERROR chunk. A remote attacker can send a specially crafted SCTP ERROR chunk after establishing an SCTP association to cause a denial of service.
Systems are affected only when SCTP support is enabled, a listening SCTP socket is opened via gen_sctp with the default inet backend, and the listening port is reachable from the attacker's network.
How to mitigate CVE-2026-49759
Install security update from vendor's website.