Stack Buffer Overflow in ei_s_print_term at Very Large Integer (CVE-2026-49760) | HOL Guard CVE

Medium · CVSS 6.9CVE-2026-49760

Stack Buffer Overflow in ei_s_print_term at Very Large Integer

Answer in brief

CVE-2026-49760 records a Medium severity (CVSS 6.9) vulnerability in Stack Buffer Overflow in ei_s_print_term at Very Large Integer. The current sources do not mark it as known exploited. The current feed maps Erlang/erlang/otp (generic), Erlang/OTP (generic), Erlang/OTP (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 10, 2026Updated Sep 24, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 24, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.9
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Erlang/erlang/otp (generic), Erlang/OTP (generic), Erlang/OTP (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Erlang/erlang/otpgeneric	>=84adefa331c4159d432d22840663c38f155cd4c1 <0bef277b2d39dc8babb9ceb4f5d0a456f3007111	0bef277b2d39dc8babb9ceb4f5d0a456f3007111
Erlang/OTPgeneric	>=17.0 <*	*
Erlang/OTPgeneric	>=3.7.16 <*	*

Recommended response

Check inventory. Check lockfiles and deployed manifests for Erlang/erlang/otp, Erlang/OTP, Erlang/OTP.
Review the reported fix. Source-reported workaround: Avoid calling ei_s_print_term with untrusted data whose encoded integer representation could exceed 2000 characters.

Evidence timeline and material changes

Published upstream
Jun 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

Stack-based Buffer Overflow vulnerability in Erlang OTP (erl_interface) allows Stack-based Buffer Overflow. This vulnerability is associated with program file lib/erl_interface/src/misc/ei_printterm.c and program routine ei_s_print_term. The C function ei_s_print_term uses an internal 2000-character stack buffer to format terms. When called with an encoded Erlang term containing a very large integer (encoded representation exceeding 2000 characters), the buffer overflows. The overflow bytes are restricted to the ASCII values of 0-9 and A-F, which limits exploitation to Denial of Service. The companion function ei_print_term, which prints directly to a FILE instead of a memory buffer, does not contain this bug. This issue affects OTP from OTP 17.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to erl_interface from 3.7.16 before 5.5.2.1, 5.7.0.1, and 5.8.1. Whether OTP before OTP 17.0, corresponding to erl_interface before 3.7.16, is affected is unknown.

Quoted source text, attributed separately from HOL analysis.