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A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libsoup-develUpgrade libsoup | Oct 15, 2026 | Oct 15, 2026 |
| Amazon_linux_2023 | — | Upgrade libsoup-debuginfoUpgrade libsoup-debugsourceUpgrade libsoup-docUpgrade libsoup-develUpgrade libsoup | Oct 13, 2026 | Sep 29, 2026 |
| Redhat_linux | — | Upgrade libsoup-develUpgrade libsoup-debuginfoUpgrade libsoup3-debugsourceUpgrade libsoupUpgrade libsoup3Upgrade libsoup3-develUpgrade libsoup3-docUpgrade libsoup-debugsourceUpgrade libsoup3-debuginfoNo solution exists | Oct 1, 2026 | Sep 3, 2026 |
| Rocky_linux | — | Upgrade libsoup-debugsourceUpgrade libsoupUpgrade libsoup-debuginfoUpgrade libsoup-devel | Oct 19, 2026 | Oct 16, 2026 |
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