Out-of-bounds Read Affecting libsoup3 package, versions <0:3.6.5-3.el10_2.20


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.42% (35th percentile)

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  • Snyk IDSNYK-ALMALINUX10-LIBSOUP3-21160149
  • published17 Oct 2026
  • disclosed15 Oct 2026

Introduced: 15 Oct 2026

NewCVE-2026-102560  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:10 libsoup3 to version 0:3.6.5-3.el10_2.20 or higher.
This issue was patched in ALSA-2026:83618.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup3 package and not the libsoup3 package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1