Integer underflow in Erlang OTP - CVE-2026-54890

Vulnerability identifier: #VU146820

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2026-54890

CWE-ID: CWE-191

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to integer underflow in the ETF decoder in binary_to_term/1,2 and enif_binary_to_term() when parsing a crafted BIT_BINARY_EXT input. A remote attacker can send a specially crafted payload to cause a denial of service.

The issue causes a full BEAM virtual machine crash rather than a process-level exception, and the [safe] option to binary_to_term/2 does not prevent it.

Erlang OTP
Debian Linux
Ubuntu
openSUSE Leap
erlang27-jinterface-src
erlang27-src
erlang27-dialyzer-debuginfo
erlang27-reltool-src
erlang27-dialyzer
erlang27-debuginfo
erlang27-diameter-src
erlang27-epmd
erlang27
erlang27-dialyzer-src
erlang27-debugsource
erlang27-reltool
erlang27-jinterface
erlang27-epmd-debuginfo
erlang27-diameter
erlang (Ubuntu package)
erlang (Debian package)

Install security update from vendor's website.

Erlang OTP - addressed in versions 27.3.4.15, 28.5.0.4, 29.0.4
erlang27-jinterface-src - update to 27.1.3-150300.7.7.1
erlang27-src - update to 27.1.3-150300.7.7.1
erlang27-dialyzer-debuginfo - update to 27.1.3-150300.7.7.1
erlang27-reltool-src - update to 27.1.3-150300.7.7.1
erlang27-dialyzer - update to 27.1.3-150300.7.7.1
erlang27-debuginfo - update to 27.1.3-150300.7.7.1
erlang27-diameter-src - update to 27.1.3-150300.7.7.1
erlang27-epmd - update to 27.1.3-150300.7.7.1
erlang27 - update to 27.1.3-150300.7.7.1
erlang27-dialyzer-src - update to 27.1.3-150300.7.7.1
erlang27-debugsource - update to 27.1.3-150300.7.7.1
erlang27-reltool - update to 27.1.3-150300.7.7.1
erlang27-jinterface - update to 27.1.3-150300.7.7.1
erlang27-epmd-debuginfo - update to 27.1.3-150300.7.7.1
erlang27-diameter - update to 27.1.3-150300.7.7.1
erlang (Ubuntu package) - addressed in versions 1:16.b.3-dfsg-1ubuntu2.2+esm2, 1:18.3-dfsg-1ubuntu3.1+esm3, 1:20.2.2+dfsg-1ubuntu2+esm3, 1:22.2.7+dfsg-1ubuntu0.5+esm2, 1:24.2.1+dfsg-1ubuntu0.7, 1:25.3.2.8+dfsg-1ubuntu4.7, 1:27.3.4.6+dfsg-1ubuntu0.1
erlang (Debian package) - update to 1:27.3.4.1+dfsg-1+deb13u3

• https://github.com/erlang/otp/security/advisories/GHSA-54pw-5645-jh86

• Debian update for erlang
• Multiple vulnerabilities in Erlang OTP
• Ubuntu update for erlang
• SUSE update for erlang27