UBUNTU-CVE-2026-42245

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Source
https://ubuntu.com/security/CVE-2026-42245
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42245.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-42245
Upstream
Published
2026-05-09T20:16:00Z
Modified
2026-06-16T13:30:47.655476360Z
Severity
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

References

Affected packages

Ubuntu:25.10 / jruby

Package

Name
jruby
Purl
pkg:deb/ubuntu/jruby?arch=source&distro=questing

Affected ranges

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

Affected versions

9.*
9.4.8.0+ds-2ubuntu1
9.4.8.0+ds-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "jruby",
            "binary_version": "9.4.8.0+ds-3ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42245.json"

Ubuntu:25.10 / ruby3.3

Package

Name
ruby3.3
Purl
pkg:deb/ubuntu/ruby3.3?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.3.7-1ubuntu2
3.3.8-2ubuntu1
3.3.8-2ubuntu2
3.3.8-2ubuntu2.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libruby3.3",
            "binary_version": "3.3.8-2ubuntu2.1"
        },
        {
            "binary_name": "ruby3.3",
            "binary_version": "3.3.8-2ubuntu2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42245.json"