Vulnerability · Published Oct 23, 2025 · Assigned by redhat
CVE-2025-12105Libsoup: heap use-after-free in libsoup message queue handling during http/2 read completion
High 7.5
In plain English
A high-severity use-after-free in libsoup from GNOME. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | libsoup3-doc | 3.6.5-3.el10_1.7 | ALSA-2025:23139 |
| Debian:12 | libsoup3 | no fix listed | DEBIAN-CVE-2025-12105 |
| Debian:13 | libsoup3 | no fix listed | DEBIAN-CVE-2025-12105 |
| Rocky Linux:10 | libsoup3 | 0:3.6.5-3.el10_1.7 | RLSA-2025:23139 |
| Ubuntu:24.04:LTS | libsoup3 | 3.4.4-5ubuntu0.6 | USN-7932-1 |
| Ubuntu:24.04:LTS | libsoup3 | 3.4.4-5ubuntu0.6 | UBUNTU-CVE-2025-12105 |
| Ubuntu:25.10 | libsoup3 | 3.6.5-4ubuntu0.1 | USN-7932-1 |
| Ubuntu:25.10 | libsoup3 | 3.6.5-4ubuntu0.1 | UBUNTU-CVE-2025-12105 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GNOME | libsoup | 0 – through 3.6.5 |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- RHSA-2025:23139 vendor-advisory, x_refsource_REDHAT
- RHSA-2025:23437 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2025-12105 vdb-entry, x_refsource_REDHAT
- RHBZ#2405992 issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/481