--- title: "CVE-2026-48860\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2026-48860?format=md keywords: index, follow --- # CVE-2026-48860 Publication date 10 June 2026 Last updated 7 August 2026 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **6.5 · Medium** [Score breakdown](https://ubuntu.com/security/CVE-2026-48860?format=md#impact-score) Toggle side navigation ## 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 29.0.2, OTP 28.5.0.2 and OTP 27.3.4.13, corresponding to ssl from 11.0 before 11.7.2, 11.6.0.2 and 11.2.12.9. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | erlang | 26.04 LTS resolute | Needs evaluation | | 25.10 questing | Ignored end of life, was needs-triage | | 24.04 LTS noble | Needs evaluation | | 22.04 LTS jammy | Needs evaluation | | 20.04 LTS focal | Needs evaluation | | 18.04 LTS bionic | Needs evaluation | | 16.04 LTS xenial | Needs evaluation | | 14.04 LTS trusty | Needs evaluation | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ## Severity score breakdown CVSS version: CVSS v4.0 [CVSS v4.0](https://ubuntu.com/security/CVE-2026-48860?format=md) [CVSS v3.0](https://ubuntu.com/security/CVE-2026-48860?format=md) **Base score** 7.5 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Adjacent | | Attack complexity | High | | Attack requirements | Present | | Privileges required | Low | | User interaction | None | | Vulnerable system - Confidentiality impact | High | | Vulnerable system - Integrity impact | High | | Vulnerable system - Availability impact | High | | Subsequent system - Confidentiality impact | None | | Subsequent system - Integrity impact | None | | Subsequent system - Availability impact | None | * Scores | Parameter | Value | | --- | --- | | Base score | 7.5 · High | | Base + Threat score | - | | Base + Environmental score | - | | Base + Threat + Environmental score | - | **Vector:** CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-48860) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-48860) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-48860) * [Debian](https://security-tracker.debian.org/tracker/CVE-2026-48860) ### Other references * * * *