CVE-2025-12105
Publication date 23 October 2025
Last updated 15 December 2025
Ubuntu priority
Description
A flaw was found in the asynchronous message queue handling of the libsoup library, widely used by GNOME and WebKit-based applications to manage HTTP/2 communications. When network operations are aborted at specific timing intervals, an internal message queue item may be freed twice due to missing state synchronization. This leads to a use-after-free memory access, potentially crashing the affected application. Attackers could exploit this behavior remotely by triggering specific HTTP/2 read and cancel sequences, resulting in a denial-of-service condition.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libsoup2.4 | 25.10 questing |
Not affected
|
| 25.04 plucky |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| libsoup3 | 25.10 questing |
Fixed 3.6.5-4ubuntu0.1
|
| 25.04 plucky |
Fixed 3.6.5-1ubuntu0.3
|
|
| 24.04 LTS noble |
Fixed 3.4.4-5ubuntu0.6
|
|
| 22.04 LTS jammy |
Fixed 3.0.7-0ubuntu1+esm6
|
Get expanded security coverage with Ubuntu Pro
Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.
Get Ubuntu Pro 30-day free trialPatch details
| Package | Patch details |
|---|---|
| libsoup3 |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-7932-1
- libsoup vulnerability
- 15 December 2025