# CVE-2026-48860: Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion in inet_tls_dist CVE-2026-48860 is fixed in 38 products on 1 platform, first by DEBIAN-CVE-2026-48860, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-48860 - Priority: Routine - CVSS: 6.5 (Important) - EPSS: 0.0021 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 10, 2026 - Weakness: Comparison Using Wrong Factors - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48860 ## Description Reliance on IP Address for Authentication vulnerability in Erlang/OTP ssl (inet_tls_dist module) allows unauthenticated bypass of the distribution-over-TLS LAN allowlist. The inet_tls_dist:check_ip/1 function, which enforces a LAN allowlist for Erlang distribution over TLS, calls inet:sockname/1 instead of inet:peername/1 to obtain the peer's IP address. Because inet:sockname/1 returns the local socket address, both the local IP and the supposed peer IP resolve to the same value, causing the subnet mask comparison to always succeed regardless of the actual remote address. Any holder of a CA-signed TLS certificate can therefore bypass the LAN restriction and gain full Erlang distribution access to the node, including rpc:call/4 and code:load_binary/3. This vulnerability is associated with program file lib/ssl/src/inet_tls_dist.erl. This issue affects OTP from OTP 26.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to ssl from 11.0 before 11.2.12.9, 11.6.0.2, and 11.7.2. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | erlang Debian 13.5 (trixie) | 1:27.3.4.1+dfsg-1+deb13u3 | [DEBIAN-CVE-2026-48860](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48860.md) | Jun 24, 2026 | | Linux | erlang Debian 14 | 1:29.0.2+dfsg-1 | [DEBIAN-CVE-2026-48860](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48860.md) | Jun 24, 2026 | | Linux | erlang Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-asn1 Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-asn1 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-asn1-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-base Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-base 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-base-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-common-test Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-common-test 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-common-test-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-crypto Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-crypto 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-crypto-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-debugger Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-debugger 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-debugger-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-dialyzer Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-dialyzer 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-dialyzer-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-diameter Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-diameter 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-diameter-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-edoc Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-edoc 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-edoc-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-eldap Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-eldap 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-eldap-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-et Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-et 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-et-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-eunit Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-eunit 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-eunit-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-examples Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-examples 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-examples-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-ftp Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-ftp 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-ftp-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-inets Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-inets 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-inets-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-jinterface Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-jinterface 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-jinterface-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-megaco Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-megaco 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-megaco-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-mnesia Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-mnesia 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-mnesia-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-mode Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-mode 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-mode-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-nox Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-nox 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-nox-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-observer Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-observer 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-observer-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-odbc Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-odbc 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-odbc-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-os-mon Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-os-mon 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-os-mon-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-parsetools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-parsetools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-parsetools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-public-key Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-public-key 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-public-key-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-reltool Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-reltool 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-reltool-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-runtime-tools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-runtime-tools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-runtime-tools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-snmp Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-snmp 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-snmp-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-src Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-src 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-src-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-ssh Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-ssh 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-ssh-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-ssl Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-ssl 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-ssl-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-syntax-tools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-syntax-tools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-syntax-tools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-tftp Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-tftp 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-tftp-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-tools Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-tools 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-tools-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-wx Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-wx 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-wx-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-x11 Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-x11 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-x11-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang-xmerl Ubuntu 26.04.1 LTS (resolute) | 1:27.3.4.6+dfsg-1ubuntu0.2 | [erlang-xmerl 1:27.3.4.6+dfsg-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-erlang-xmerl-1-27.3.4.6-dfsg-1ubuntu0.2.md) | Sep 22, 2026 | | Linux | erlang26 sles 15.6 | 26.2.1-150300.7.28.1 | [SUSE-SU-2026:3579-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3579-1.md) | Aug 11, 2026 | | Linux | erlang26 sles 15.7 | 26.2.1-150300.7.28.1 | [SUSE-SU-2026:3579-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3579-1.md) | Aug 11, 2026 | --- Data as of 2026-11-08T00:53:09Z UTC. 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