CVE-2026-15712: Red Hat Enterprise Linux 10

Medium severity, CVSS 5.9. EPSS: 0.5% chance of exploitation in the next 30 days.

A heap buffer over-read vulnerability was discovered in libsoup's (versions: libsoup 3.0 to 3.7.0) HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the "Additional Debug Data" payload by assuming the data stream is a safely NUL-terminated C-string. Because the parser lacks strict length-boundary verification before reading this data, a remote, unauthenticated attacker can intentionally send a malformed GOAWAY frame missing the appropriate null delimiter. This causes the library to read past the end of the allocated buffer, triggering an application crash that results in a denial of service (DoS), or potentially exposing fragments of memory contents.

Affected products

• Red Hat Red Hat Enterprise Linux 10

Published 2026-07-14. Last modified 2026-07-15.