Heap Buffer Over-Read in libsoup's HTTP/2 Connection Tracking Framework
CVE-2026-15712

5.9MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Vendor
CVE Published:
14 July 2026

What is CVE-2026-15712?

A vulnerability in libsoup's HTTP/2 connection tracking framework allows a remote, unauthenticated attacker to exploit the improper handling of the 'Additional Debug Data' in a malformed GOAWAY frame. This oversight results from the parser's failure to conduct strict length-boundary verification before reading the data, which leads to a heap buffer over-read condition. Consequently, this may crash applications, causing denial of service (DoS), and potentially exposing sensitive memory fragments.

References

https://access.redhat.com/security/cve/CVE-2026-15712
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2499939
issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/540

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank cavid for reporting this issue.
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