CVE-2026-85197Network attack vectorHinoki check available

Code execution via freed HTTP/2 upload state

Published Sep 4, 2026 · Updated Sep 4, 2026

Heap use-after-free in libsoup3 on Red Hat Enterprise Linux 10 allows remote attackers to corrupt memory during HTTP/2 uploads. The on_data_read() callback continues using heap-backed upload state after a GOAWAY frame frees it during an asynchronous body read. A malicious HTTP/2 server or man-in-the-middle attacker must induce a GNOME application to upload a file; exploitation can disclose memory, crash the application, or execute code.

CVSS severity7.6
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Heap use-after-free in libsoup3 on Red Hat Enterprise Linux 10 allows remote attackers to corrupt memory during HTTP/2 uploads. The on_data_read() callback continues using heap-backed upload state after a GOAWAY frame frees it during an asynchronous body read. A malicious HTTP/2 server or man-in-the-middle attacker must induce a GNOME application to upload a file; exploitation can disclose memory, crash the application, or execute code.

The record

CVE
CVE-2026-85197
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 10
Classifications
CWE-416, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.

Published CVSS scores

7.6Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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