CVE-2026-12549

Description

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.

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Produits concernés

• Red Hat Enterprise Linux 10
• Red Hat Enterprise Linux 6
• Red Hat Enterprise Linux 7
• Red Hat Enterprise Linux 8
• Red Hat Enterprise Linux 9
• Redhat enterprise linux
• Gnome libsoup

Scores CVSS

Faiblesses (CWE)

• CWE-805

Références

• https://access.redhat.com/security/cve/CVE-2026-12549 Vendor AdvisoryMitigation
• https://access.redhat.com/security/cve/cve-2026-0716 Vendor AdvisoryMitigation
• https://bugzilla.redhat.com/show_bug.cgi?id=2489999 Issue TrackingVendor Advisory
• https://gitlab.gnome.org/GNOME/libsoup/-/work_items/516 ExploitIssue TrackingPatchVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories