CVE-2025-11021

Libsoup: out-of-bounds read in cookie date handling of libsoup http library

publishedCWE-125

A flaw was found in the cookie date handling logic of the libsoup HTTP library, widely used by GNOME and other applications for web communication. When processing cookies with specially crafted expiration dates, the library may perform an out-of-bounds memory read. This flaw could result in unintended disclosure of memory contents, potentially exposing sensitive information from the process using libsoup.

Technical severity7.5 highCVSS 3.1 · CNA: redhat

Published2025-09-26Source updated 2026-11-04

Collected2026-11-042 attributed sources

Fixes and workarounds

Workaround

Mitigation for this issue is either not available or the currently available options don’t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to a widespread installation base, or stability. It is strongly recommended to apply vendor-supplied patches once available.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
`libsoup` https://gitlab.gnome.org/GNOME/libsoup/	≥ 0; ≤ 3.6.5 (affected, semver) Other versions: unaffected	CNA: redhat
Red Hat Enterprise Linux 10 Red Hat `libsoup3` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.5-3.el10_0.7; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 10 Red Hat `libsoup3` https://access.redhat.com/downloads/content/package-browser/	≥ 0:3.6.5-3.el10_1.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 7 Extended Lifecycle Support Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.2-9.el7_9; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-10.el8_10; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.2 Advanced Update Support Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-1.el8_2.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-2.el8_4.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-2.el8_4.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-2.el8_6.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Telecommunications Update Service Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-2.el8_6.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-2.el8_6.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.62.3-3.el8_8.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.72.0-10.el9_6.3; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.72.0-12.el9_7.1; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.72.0-8.el9_0.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.72.0-8.el9_2.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9.4 Extended Update Support Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	≥ 0:2.72.0-8.el9_4.6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `libsoup` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 7.5 high	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2025:18183CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:19713CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:19714CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:20959CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21032CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21655CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21656CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21657CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21664CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21665CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21666CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:21772CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:22013CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2025-11021CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2399627CNA: redhat · issue-tracking, x_refsource_REDHAT
https://gitlab.gnome.org/GNOME/libsoup/-/issues/459CNA: redhat

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