Libsoup: incomplete fix for cve-2026-2443: range suffix overflow in libsoup soupserver
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | affected | — |
| Red Hat | Red Hat Enterprise Linux 6 | unknown | — |
| Red Hat | Red Hat Enterprise Linux 7 | unknown | — |
| Red Hat | Red Hat Enterprise Linux 8 | affected | — |
| Red Hat | Red Hat Enterprise Linux 9 | affected | — |
Configuration 1 [-]
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Configuration 2 [-]
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No data.
| Vendor | Product | Versions | ||||||||
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| Libsoup | Libsoup |
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| Redhat | Enterprise Linux |
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Vendor Workaround
To mitigate this issue, applications utilizing libsoup's WebSocket support should ensure that the `max_incoming_payload_size` is explicitly set to a non-zero value. This prevents the library from processing WebSocket frames with an unset or zero maximum payload size, which can lead to out-of-bounds reads. Consult application-specific documentation for configuring libsoup parameters.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.357% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat rhel Els
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| CPEs | cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:rhel_els:6 cpe:/o:redhat:rhel_els:7 |
| Vendors & Products |
Redhat rhel Els
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| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Libsoup
Libsoup libsoup |
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| Vendors & Products |
Libsoup
Libsoup libsoup |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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| Type | Values Removed | Values Added |
|---|---|---|
| Description | The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding. | |
| Title | Libsoup: incomplete fix for cve-2026-2443: range suffix overflow in libsoup soupserver | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
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| Weaknesses | CWE-805 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
| |
| Metrics |
cvssV3_1
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