Libsoup: libsoup: heap buffer overflow during outgoing permessage-deflate buffer growth
Historical advisory recorded 11 Nov 2026 13:57:25 UTC. Read the latest advisory.
cve-program · CVE-2026-102560
PublishedA 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.
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cve-program · CVE-2026-102560
PublishedLibsoup: libsoup: heap buffer overflow during outgoing permessage-deflate buffer growth
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.
- Source published
- 29 Sep 2026 17:15:36 UTC
- Source modified
- 11 Nov 2026 12:48:57 UTC
- Saved here
- 11 Nov 2026 13:57:25 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H