CVE-2026-102560
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|
Weaknesses
- CWE-125: Out-of-bounds Read
Workarounds
To mitigate this disable the permessage-deflate WebSocket extension if it is not required, and cap outgoing message sizes.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://access.redhat.com/security/cve/CVE-2026-102560
- https://bugzilla.redhat.com/show_bug.cgi?id=2543296
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