UBUNTU-CVE-2026-75758

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Source
https://ubuntu.com/security/CVE-2026-75758
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75758.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-75758
Upstream
Published
2026-08-28T16:18:00Z
Modified
2026-09-02T16:27:46Z
Severity
  • 5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Uncontrolled Recursion vulnerability in the Elixir standard library allows an attacker who controls a list passed to inspect/1, List.tostring/1, or List.tocharlist/1 to exhaust a BEAM node's memory. Inspect.List's charlist branch in lib/elixir/lib/inspect.ex classifies a list as a charlist using List.asciiprintable?/2, which examines only the first :printablelimit (4096 by default) elements, and then calls IO.chardatatostring/1 on the whole term. A list whose printable prefix exceeds that limit but which contains a later element that is not a code point (an atom, an out-of-range integer, or an improper tail) is therefore mis-classified, and the conversion raises ArgumentError. That conversion runs inside List.tostring/1, whose rescue clause builds its message by interpolating inspect(list), which re-enters the same branch and raises again. The nested inspection is an argument to raise, so the recursion is not in tail position and every level is retained: the process stack grows monotonically while each cycle re-walks the list, until the process is killed by maxheapsize or, by default, the node runs out of memory. List.tocharlist/1 has the same rescue shape. Below the printable limit the inner inspect/1 sees the invalid element within its counter and renders the list in ordinary bracket form, so a single ArgumentError is raised and no recursion occurs. This issue affects elixir: from 1.15.0-rc.0 before 1.18.5, from 1.19.0-rc.0 before 1.19.6, and from 1.20.0-rc.0 before 1.20.4.

References

Affected packages

Ubuntu:14.04:LTS / elixir

Package

Name
elixir
Purl
pkg:deb/ubuntu/elixir?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.7.1-1
0.7.1-2
0.7.1-4build0.14.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.7.1-4build0.14.04.1",
            "binary_name": "python-elixir"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75758.json"

Ubuntu:16.04:LTS / elixir

Package

Name
elixir
Purl
pkg:deb/ubuntu/elixir?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.7.1-3
0.7.1-4build0.16.04.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.7.1-4build0.16.04.1",
            "binary_name": "python-elixir"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75758.json"

Ubuntu:18.04:LTS / elixir

Package

Name
elixir
Purl
pkg:deb/ubuntu/elixir?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.7.1-4build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.7.1-4build1",
            "binary_name": "python-elixir"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75758.json"