Bug 2522094 - CVE-2026-77680 CVE-2026-77680 CVE-2026-77014 CVE-2026-12549 libsoup3: libsoup: quadratic CPU denial of service in HTTP Range coalescing after CVE-2025-32907 fix [fedora-all]
Summary: CVE-2026-77680 CVE-2026-77680 CVE-2026-77014 CVE-2026-12549 libsoup3: libsou...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: libsoup3
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Adrian Vovk
QA Contact:
URL:
Whiteboard: {"flaws": ["97dd8501-9a5b-4650-9ac9-4...
: 2490533 2520148 (view as bug list)
Depends On:
Blocks: CVE-2026-12549 CVE-2026-77014 2520892
TreeView+ depends on / blocked
 
Reported: 2026-08-24 17:18 UTC by Ganesh
Modified: 2026-09-12 00:18 UTC (History)
5 users (show)

Fixed In Version: libsoup3-3.6.6-10.fc44 libsoup3-3.6.6-5.fc43 libsoup3-3.7.2-2.fc45
Clone Of:
Environment:
Last Closed: 2026-09-08 01:12:28 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
GNOME Gitlab GNOME/libsoup/-/commit/e82c13ba03defcee10f981ac964f4d570b21a251 0 None None None 2026-09-04 00:31:00 UTC
GNOME Gitlab GNOME libsoup issues 538 0 None closed (CVE-2026-77680) Incomplete fix for CVE-2025-32907: Range-coalescing DoS persists as O(N²) CPU exhaustion on patched lib... 2026-09-04 00:31:00 UTC

Description Ganesh 2026-08-24 17:18:57 UTC
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.

A flaw was found in libsoup's HTTP Range request handling in SoupServer. The fix for CVE-2025-32907 corrected range merge logic but left an O(N²) coalescing algorithm that removes merged ranges with g_array_remove_index(), causing quadratic CPU consumption when a client sends many identical satisfiable ranges in one Range header. An unauthenticated remote attacker can send a crafted HTTP GET with thousands of bytes=0-0 ranges to exhaust CPU on the server worker processing the request. Fixed upstream in merge request !550 (O(N) in-place merge plus 200-range cap).

Comment 1 Milan Crha 2026-09-04 07:17:42 UTC
*** Bug 2520148 has been marked as a duplicate of this bug. ***

Comment 2 Milan Crha 2026-09-04 07:20:22 UTC
*** Bug 2490533 has been marked as a duplicate of this bug. ***

Comment 3 Fedora Update System 2026-09-05 20:54:54 UTC
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

Comment 4 Fedora Update System 2026-09-05 20:55:09 UTC
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

Comment 5 Fedora Update System 2026-09-05 20:55:24 UTC
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

Comment 6 Fedora Update System 2026-09-06 00:57:02 UTC
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.

Comment 7 Fedora Update System 2026-09-06 01:07:45 UTC
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.

Comment 8 Fedora Update System 2026-09-06 01:27:01 UTC
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.

Comment 9 Fedora Update System 2026-09-08 01:12:28 UTC
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.

Comment 10 Fedora Update System 2026-09-10 01:14:30 UTC
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.

Comment 11 Fedora Update System 2026-09-12 00:18:39 UTC
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.


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