A flaw was found in libsoup.
CVE-2026-102560
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.
Assessment
- CVSS
- 8.6 (v3.1)
- Severity
- High
- EPSS
- 0.42% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 29 September 2026
- Last updated
- 2 November 2026
- Affected
- Red Hat · Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat Enterprise Linux 9 · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- Assigner
- redhat
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
At the source
References
- https://access.redhat.com/errata/RHSA-2026:83384
- https://access.redhat.com/errata/RHSA-2026:83618
- https://access.redhat.com/errata/RHSA-2026:93445
- https://access.redhat.com/errata/RHSA-2026:93446
- https://access.redhat.com/errata/RHSA-2026:93447
- https://access.redhat.com/errata/RHSA-2026:93583
- https://access.redhat.com/security/cve/CVE-2026-102560
- https://bugzilla.redhat.com/show_bug.cgi?id=2543296
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