cveboard RSS feed

CVE-2026-42792

CVE.org · Published

Historical CVEsJSONAI instructions

Record status
Published
Identifier year (not publication year)
2026
Source publication
Source updated
Imported by cveboard
Source snapshot
cve_2026-10-24_midnight_baseline ·

Plain text

CNA source text (English)

epmd permanent DoS via EMFILE on accept(2) in erts

Improper Handling of Exceptional Conditions vulnerability in Erlang OTP erts (epmd) allows an unauthenticated remote attacker to permanently terminate the Erlang Port Mapper Daemon (epmd) via connection slot exhaustion. The do_accept function in erts/epmd/src/epmd_srv.c calls epmd_cleanup_exit() when accept(2) returns EMFILE (per-process file descriptor limit reached) or ENFILE (system-wide file descriptor limit reached), rather than treating these as recoverable conditions. An attacker can exhaust epmd's file descriptor slots by holding many TCP connections open while periodically sending a single byte to reset the idle timeout, then causing accept(2) to return EMFILE, which kills the daemon. epmd has no per-source-IP connection cap, making the attack feasible from a single source. On Debian/Ubuntu default packaging the impact is amplified: the systemd unit inherits a low file descriptor soft limit, and repeated daemon deaths trigger systemd's start-rate-limit, permanently failing both epmd.service and epmd.socket and requiring manual operator intervention to recover. This issue affects OTP from OTP 17.0 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

OTP

Vendor
Erlang
Product
OTP
Platforms
Unknown
Default status
unaffected
Package
erts
OTP · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
6.0affectedotp*Unavailable
  1. 17.0.4 → unaffected
  2. 16.4.0.4 → unaffected
  3. 15.2.7.11 → unaffected

OTP

Vendor
Erlang
Product
OTP
Platforms
Unknown
Default status
unaffected
Package
erlang/otp
Package collection
https://github.com
OTP · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
17.0affectedotp*Unavailable
  1. 29.0.4 → unaffected
  2. 28.5.0.4 → unaffected
  3. 27.3.4.15 → unaffected
07b8f441ca711f9812fad9e9115bab3c3aa92f79affectedgit865d203e4a6a8f44179eced9e1428f9259e4a3bbUnavailableNone listed