CVE intelligence and bounded remediation

CVE-2026-12549 — Redhat Enterprise Linux security vulnerability

Medium CVSS 4.8

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.

Severity: Medium
CVSS: 4.8 (3.1)
Published: 2026-06-22
CISA KEV: Not currently listed
Ecosystem: software/application
Weaknesses: CWE-805

Affected products

redhat / enterprise_linux / 6.0
redhat / enterprise_linux / 7.0
redhat / enterprise_linux / 8.0
redhat / enterprise_linux / 9.0
redhat / enterprise_linux / 10.0
gnome / libsoup

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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