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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. Vulnerability Reference: An out-of-bounds (OOB) read flaw was discovered in libsoup's multipart input streaming parser, allowing a remote attacker to trigger a crash or potentially expose sensitive memory contents. Component / Vulnerable Part: libsoup -> Multipart handling engine (libsoup/soup-multipart-input-stream.c -> soup_multipart_input_stream_read_headers()) Technical Analysis & Root Cause: When an application utilizing a SoupSession parses a multipart MIME message response, it invokes soup_multipart_input_stream_read_headers() to extract contextual block structures. A validation vulnerability exists where the logic fails to enforce strict length limits on the incoming boundary string delimiter. If a malicious remote endpoint supplies an exceptionally large multipart boundary string, the internal memory pointer indexing calculations drift past the expected buffer boundaries, triggering an out-of-bounds read operation on the heap or stack layout. Impact: A remote, unauthenticated attacker serving a malformed multipart HTTP payload can cause the application process to terminate unexpectedly (Denial of Service) via a segmentation fault or glean layout information from adjacent memory locations.
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle. Changing version to 45.
Proposed upstream fix: https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/546
FEDORA-2026-3f60ccf61f (libsoup3-3.6.6-10.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-3f60ccf61f
FEDORA-2026-ce24b84bb1 (libsoup3-3.7.2-2.fc45) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-ce24b84bb1
FEDORA-2026-fce2f41203 (libsoup3-3.6.6-5.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2026-fce2f41203
FEDORA-2026-3f60ccf61f has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-3f60ccf61f` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-3f60ccf61f See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-ce24b84bb1 has been pushed to the Fedora 45 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-ce24b84bb1` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-ce24b84bb1 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-fce2f41203 has been pushed to the Fedora 43 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-fce2f41203` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-fce2f41203 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-3f60ccf61f (libsoup3-3.6.6-10.fc44) has been pushed to the Fedora 44 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-fce2f41203 (libsoup3-3.6.6-5.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.
FEDORA-2026-ce24b84bb1 (libsoup3-3.7.2-2.fc45) has been pushed to the Fedora 45 stable repository. If problem still persists, please make note of it in this bug report.