What’s Vulnerable › Vulnerabilities

CVE-2026-85197: Libsoup: libsoup: heap use-after-free in libsoup http/2 client on_data_read() via goaway during body upload

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-04 · updated 2026-10-22
• Weakness: CWE-416

Description

A flaw was found in libsoup. A malicious HTTP/2 server or a Man-in-the-Middle (MITM) attacker can exploit a heap use-after-free vulnerability in the HTTP/2 client implementation. This occurs when a GNOME application uploads a file using HTTP/2, and the server sends a GOAWAY frame while the file body is being read asynchronously. This can lead to memory corruption, potentially resulting in information disclosure or arbitrary code execution.

Affected products

• Red Hat Enterprise Linux 10: all versions — fixed in 0:3.6.5-3.el10_2.14
• Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:3.6.5-3.el10_0.18

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:3.6.5-3.el10_2.14; Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.6.5-3.el10_0.18. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:68235
• https://access.redhat.com/errata/RHSA-2026:82728
• https://access.redhat.com/security/cve/CVE-2026-85197
• https://bugzilla.redhat.com/show_bug.cgi?id=2528425
• https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552
• https://gitlab.gnome.org/GNOME/libsoup/-/work_items/552

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