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

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 libsoup 中发现一个缺陷。恶意的 HTTP/2 服务器或中间人（MITM）攻击者可以利用 HTTP/2 客户端实现中的堆内存“释放后使用”（heap use-after-free）漏洞进行攻击。该漏洞发生在 GNOME 应用程序通过 HTTP/2 上传文件时，服务器在异步读取文件主体期间发送 GOAWAY 帧。这可能导致内存损坏，进而引发信息泄露或任意代码执行。

CVSS 7.6 · High EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1095 · Non-Application Layer Protocol

Affected Version Matrix 5

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
Red Hat Red Hat Enterprise Linux 8 any unaffected
Red Hat Red Hat Enterprise Linux 9 any unaffected
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I. Basic Information for CVE-2026-85197

Vulnerability Information
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Vulnerability Title
Libsoup: libsoup: heap use-after-free in libsoup http/2 client on_data_read() via goaway during body upload
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-85197

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III. Intelligence Information for CVE-2026-85197

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Vendor Advisories for CVE-2026-85197 (1)

Other References for CVE-2026-85197 (1)

Other References for CVE-2026-85197 (1)

Same Patch Batch · Red Hat · 2026-09-04 · 6 CVEs total

CVE-2026-81665 7.5 HIGH Corosync: corosync: heap-based buffer overflow in totempg assembly buffer during fragmente
CVE-2026-81666 6.5 MEDIUM Corosync: corosync: integer overflow in check_memb_commit_token_sanity may bypass message
CVE-2026-85769 6.5 MEDIUM Libtpms: libtpms: heap out-of-bounds read in tpm2 state unmarshalling via unchecked block_
CVE-2026-85534 5.9 MEDIUM Libsoup: libsoup: http/2 client crash in on_data_source_read_callback when settings initia
CVE-2026-76925 5.8 MEDIUM Flatpak: flatpak: toctou race condition allows symlink redirection

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-416

V. Comments for CVE-2026-85197

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