UBUNTU-CVE-2026-42792
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.
UBUNTU-CVE-2026-42792
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:UBUNTU-CVE-2026-42792
erlang
Source reference: /affected/0/package/name
- Affected versions
- 1:16.b.1-dfsg-4ubuntu1
Source reference:
/affected/0/versions1:16.b.2-dfsg-1ubuntu1Source reference:
/affected/0/versions1:16.b.2-dfsg-2ubuntu1Source reference:
/affected/0/versions1:16.b.3-dfsg-1ubuntu1Source reference:
/affected/0/versions1:16.b.3-dfsg-1ubuntu2Source reference:
/affected/0/versions1:16.b.3-dfsg-1ubuntu2.1Source reference:
/affected/0/versions1:16.b.3-dfsg-1ubuntu2.2Source reference:
/affected/0/versions1:16.b.3-dfsg-1ubuntu2.2+esm1Source reference:
/affected/0/versions - Fixed versions
- 1:16.b.3-dfsg-1ubuntu2.2+esm2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
erlang
Source reference: /affected/1/package/name
- Affected versions
- 1:18.0-dfsg-1ubuntu1
Source reference:
/affected/1/versions1:18.0-dfsg-1ubuntu2Source reference:
/affected/1/versions1:18.2-dfsg-2ubuntu1Source reference:
/affected/1/versions1:18.3-dfsg-1ubuntu1Source reference:
/affected/1/versions1:18.3-dfsg-1ubuntu2Source reference:
/affected/1/versions1:18.3-dfsg-1ubuntu3Source reference:
/affected/1/versions1:18.3-dfsg-1ubuntu3.1Source reference:
/affected/1/versions1:18.3-dfsg-1ubuntu3.1+esm1Source reference:
/affected/1/versions1:18.3-dfsg-1ubuntu3.1+esm2Source reference:
/affected/1/versions - Fixed versions
- 1:18.3-dfsg-1ubuntu3.1+esm3
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
erlang
Source reference: /affected/2/package/name
- Affected versions
- 1:20.0.4+dfsg-1ubuntu1
Source reference:
/affected/2/versions1:20.1.2+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.1.3+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.1.4+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.1.5+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.1.6+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.1.7+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.2.1+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.2.2+dfsg-1ubuntu1Source reference:
/affected/2/versions1:20.2.2+dfsg-1ubuntu2Source reference:
/affected/2/versions1:20.2.2+dfsg-1ubuntu2+esm1Source reference:
/affected/2/versions1:20.2.2+dfsg-1ubuntu2+esm2Source reference:
/affected/2/versions - Fixed versions
- 1:20.2.2+dfsg-1ubuntu2+esm3
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
erlang
Source reference: /affected/3/package/name
- Affected versions
- 1:22.0.7+dfsg-1build1
Source reference:
/affected/3/versions1:22.2+dfsg-1Source reference:
/affected/3/versions1:22.2.1+dfsg-1Source reference:
/affected/3/versions1:22.2.2+dfsg-1Source reference:
/affected/3/versions1:22.2.3+dfsg-1Source reference:
/affected/3/versions1:22.2.3+dfsg-2Source reference:
/affected/3/versions1:22.2.4+dfsg-1Source reference:
/affected/3/versions1:22.2.7+dfsg-1Source reference:
/affected/3/versions1:22.2.7+dfsg-1ubuntu0.2Source reference:
/affected/3/versions1:22.2.7+dfsg-1ubuntu0.3Source reference:
/affected/3/versions1:22.2.7+dfsg-1ubuntu0.4Source reference:
/affected/3/versions1:22.2.7+dfsg-1ubuntu0.5Source reference:
/affected/3/versions1:22.2.7+dfsg-1ubuntu0.5+esm1Source reference:
/affected/3/versions - Fixed versions
- 1:22.2.7+dfsg-1ubuntu0.5+esm2
Source reference:
/affected/3/ranges - Prerequisites
- Not stated in this record
erlang
Source reference: /affected/4/package/name
- Affected versions
- 1:23.2.6+dfsg-1build1
Source reference:
/affected/4/versions1:24.1.1+dfsg-1Source reference:
/affected/4/versions1:24.1.4+dfsg-1Source reference:
/affected/4/versions1:24.1.5+dfsg-1Source reference:
/affected/4/versions1:24.1.5+dfsg-1ubuntu1Source reference:
/affected/4/versions1:24.2+dfsg-1Source reference:
/affected/4/versions1:24.2.1+dfsg-1Source reference:
/affected/4/versions1:24.2.1+dfsg-1ubuntu0.1Source reference:
/affected/4/versions1:24.2.1+dfsg-1ubuntu0.2Source reference:
/affected/4/versions1:24.2.1+dfsg-1ubuntu0.3Source reference:
/affected/4/versions1:24.2.1+dfsg-1ubuntu0.4Source reference:
/affected/4/versions1:24.2.1+dfsg-1ubuntu0.5Source reference:
/affected/4/versions1:24.2.1+dfsg-1ubuntu0.6Source reference:
/affected/4/versions - Fixed versions
- 1:24.2.1+dfsg-1ubuntu0.7
Source reference:
/affected/4/ranges - Prerequisites
- Not stated in this record
erlang
Source reference: /affected/5/package/name
- Affected versions
- 1:25.2.3+dfsg-1
Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu1Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu3Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu4Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu4.1Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu4.2Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu4.3Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu4.4Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu4.5Source reference:
/affected/5/versions1:25.3.2.8+dfsg-1ubuntu4.6Source reference:
/affected/5/versions - Fixed versions
- 1:25.3.2.8+dfsg-1ubuntu4.7
Source reference:
/affected/5/ranges - Prerequisites
- Not stated in this record
erlang
Source reference: /affected/6/package/name
- Affected versions
- 1:27.3.4.1+dfsg-1build1
Source reference:
/affected/6/versions1:27.3.4.3+dfsg-1Source reference:
/affected/6/versions1:27.3.4.4+dfsg-1Source reference:
/affected/6/versions1:27.3.4.6+dfsg-1Source reference:
/affected/6/versions - Fixed versions
- 1:27.3.4.6+dfsg-1ubuntu0.1
Source reference:
/affected/6/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
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"package": {
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"purl": "pkg:deb/ubuntu/erlang?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
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"1:16.b.3-dfsg-1ubuntu2",
"1:16.b.3-dfsg-1ubuntu2.1",
"1:16.b.3-dfsg-1ubuntu2.2",
"1:16.b.3-dfsg-1ubuntu2.2+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42792.json"
},
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{
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"binary_version": "1:16.b.3-dfsg-1ubuntu2.2+esm2"
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{
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{
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{
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{
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{
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},
{
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},
{
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{
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{
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{
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},
{
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},
{
"binary_name": "erlang-xmerl",
"binary_version": "1:18.3-dfsg-1ubuntu3.1+esm3"
}
],
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"
}
},
{
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{
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{
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{
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]
}
],
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"1:20.1.4+dfsg-1ubuntu1",
"1:20.1.5+dfsg-1ubuntu1",
"1:20.1.6+dfsg-1ubuntu1",
"1:20.1.7+dfsg-1ubuntu1",
"1:20.2.1+dfsg-1ubuntu1",
"1:20.2.2+dfsg-1ubuntu1",
"1:20.2.2+dfsg-1ubuntu2",
"1:20.2.2+dfsg-1ubuntu2+esm1",
"1:20.2.2+dfsg-1ubuntu2+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42792.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-asn1",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-base",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-base-hipe",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-common-test",
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},
{
"binary_name": "erlang-corba",
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},
{
"binary_name": "erlang-crypto",
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},
{
"binary_name": "erlang-debugger",
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},
{
"binary_name": "erlang-dialyzer",
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},
{
"binary_name": "erlang-diameter",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-edoc",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-eldap",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-erl-docgen",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-et",
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},
{
"binary_name": "erlang-eunit",
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},
{
"binary_name": "erlang-examples",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-ic",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-ic-java",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-inets",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-jinterface",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-manpages",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-megaco",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-mnesia",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-mode",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-nox",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-observer",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-odbc",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-os-mon",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-parsetools",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-public-key",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-reltool",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-runtime-tools",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-snmp",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-src",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-ssh",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-ssl",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-syntax-tools",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-tools",
"binary_version": "1:20.2.2+dfsg-1ubuntu2+esm3"
},
{
"binary_name": "erlang-wx",
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},
{
"binary_name": "erlang-x11",
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},
{
"binary_name": "erlang-xmerl",
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}
],
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}
},
{
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{
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{
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},
{
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]
}
],
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},
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"1:22.2+dfsg-1",
"1:22.2.1+dfsg-1",
"1:22.2.2+dfsg-1",
"1:22.2.3+dfsg-1",
"1:22.2.3+dfsg-2",
"1:22.2.4+dfsg-1",
"1:22.2.7+dfsg-1",
"1:22.2.7+dfsg-1ubuntu0.2",
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"1:22.2.7+dfsg-1ubuntu0.5",
"1:22.2.7+dfsg-1ubuntu0.5+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42792.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang",
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},
{
"binary_name": "erlang-asn1",
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},
{
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},
{
"binary_name": "erlang-base-hipe",
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},
{
"binary_name": "erlang-common-test",
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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{
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{
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},
{
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},
{
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},
{
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},
{
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},
{
"binary_name": "erlang-jinterface",
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},
{
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},
{
"binary_name": "erlang-megaco",
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{
"binary_name": "erlang-mnesia",
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},
{
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{
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{
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{
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},
{
"binary_name": "erlang-os-mon",
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},
{
"binary_name": "erlang-parsetools",
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},
{
"binary_name": "erlang-public-key",
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},
{
"binary_name": "erlang-reltool",
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},
{
"binary_name": "erlang-runtime-tools",
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},
{
"binary_name": "erlang-snmp",
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},
{
"binary_name": "erlang-src",
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},
{
"binary_name": "erlang-ssh",
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},
{
"binary_name": "erlang-ssl",
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{
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{
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{
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{
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},
{
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"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42792.json"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"binary_name": "erlang-os-mon",
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{
"binary_name": "erlang-parsetools",
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{
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{
"binary_name": "erlang-reltool",
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{
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{
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{
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{
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{
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{
"binary_name": "erlang-syntax-tools",
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{
"binary_name": "erlang-tftp",
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{
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{
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{
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{
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],
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},
{
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"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42792.json"
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{
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{
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{
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{
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{
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]Publisher severity
No explicit severity was provided.
- Event
- #23722 · Revision 1
- Added to Heist Feed
- Publisher date