CVE catalog

CVE-2025-25186

Ruby vulnerabilities

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Feb 10, 2025, 3:55:56 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.63% · Oct 25, 2026

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion in `net-imap`'s response parser. At any time while the client is connected, a malicious server can send can send highly compressed `uid-set` data which is automatically read by the client's receiver thread. The response parser uses `Range#to_a` to convert the `uid-set` data into arrays of integers, with no limitation on the expanded size of the ranges. Versions 0.3.8, 0.4.19, 0.5.6, and higher fix this issue. Additional details for proper configuration of fixed versions and backward compatibility are available in the GitHub Security Advisory.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ruby3.1	bookworm	`3.1.2-7+deb12u1`	vulnerable
Debian	ruby3.1	bookworm-security	`3.1.2-7+deb12u1`	vulnerable
Ubuntu	ruby3.1	noble	Not reported	vulnerable
Ubuntu	ruby3.2	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Ubuntu	libruby3.2	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Ubuntu	ruby3.2-dev	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Ubuntu	ruby3.2-doc	noble	`3.2.3-1ubuntu0.24.04.5`	fixed
Ubuntu	ruby3.2	24.04	`3.2.3-1`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1build2`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1build3`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1ubuntu0.24.04.1`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1ubuntu0.24.04.3`	vulnerable
Ubuntu	ruby3.2	24.04	`3.2.3-1ubuntu0.24.04.5`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ruby3.1	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1103791]
Ubuntu	ruby3.2	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	libruby3.2	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	ruby3.2-dev	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	ruby3.2-doc	deb	noble	`3.2.3-1ubuntu0.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	ruby3.2	deb	24.04	`3.2.3-1ubuntu0.24.04.5`	Not reported	UBUNTU-CVE-2025-25186	Not reported

[Debian bug #1103791]

Notes

[bookworm] ruby3.1: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libruby3.1]Affected
Source package: [ruby3.1]
Details (4)
- 3.1.2-7+deb12u1 · amd64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · amd64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
[ruby3.1]Affected
Details (4)
- 3.1.2-7+deb12u1 · amd64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · amd64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
[ruby3.1-dev]Affected
Source package: [ruby3.1]
Details (4)
- 3.1.2-7+deb12u1 · amd64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · amd64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · arm64 · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
[ruby3.1-doc]Affected
Source package: [ruby3.1]
Details (4)
- 3.1.2-7+deb12u1 · all · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · all · bookworm
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · all · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12
- 3.1.2-7+deb12u1 · all · bookworm-security
  Affected
  usn · ruby3.1 · debian · bookworm; usn · ruby3.1 · debian · 12

[Debian 13 (Trixie)]

[libruby3.3]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13
[ruby3.3]Fixed
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13
[ruby3.3-dev]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · amd64 · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · arm64 · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13
[ruby3.3-doc]Fixed
Source package: [ruby3.3]
Details (2)
- 3.3.8-2 · all · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13
- 3.3.8-2 · all · trixie
  Fixed · Fixed: 3.3.8-1
  usn · ruby3.3 · debian · 13

Observed: Oct 26, 2026, 11:20:05 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]