Buffer Access with Incorrect Length Value Affecting libsoup3-devel package, versions <0:3.7.2-1.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.36% (27th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBSOUP3DEVEL-20249868
  • published29 Sept 2026
  • disclosed22 Jun 2026

Introduced: 22 Jun 2026

CVE-2026-12549  (opens in a new tab)
CWE-805  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libsoup3-devel to version 0:3.7.2-1.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3144.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsoup3-devel package and not the libsoup3-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding.

CVSS Base Scores

version 3.1