CVE-2025-12105
Libsoup: heap use-after-free in libsoup message queue handling during http/2 read completion
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-416 |
| Vendor | gnome |
| Product | libsoup |
| Published | Oct 23, 2025 |
| Last Updated | Mar 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
GNOME / libsoup
0 ≤ 3.6.5
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2025:23139 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:23437 access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-12105 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2405992 gitlab.gnome.org: https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/481
Credits
Red Hat would like to thank Eugene Mutavchi for reporting this issue.