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Fencer Vulns
high 7.5

CVE-2025-11021 json

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

published 2025-09-26 13 mo ago modified 2026-11-04 4 d ago also EUVD-2025-31225

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:3.6.5-3.el10_0.7, 0:3.6.5-3.el10_1.6
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.62.2-9.el7_9
  • Red Hat Red Hat Enterprise Linux 8 0:2.62.3-10.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.6
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.6
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.62.3-2.el8_4.6
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.6
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.6
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.6
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.62.3-3.el8_8.6
  • Red Hat Red Hat Enterprise Linux 9 0:2.72.0-10.el9_6.3, 0:2.72.0-12.el9_7.1
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.6
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.72.0-8.el9_2.6
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:2.72.0-8.el9_4.6
  • libsoup3 Ubuntu 24.04 LTS 3.4.4-5ubuntu0.5
  • libsoup3 Ubuntu 25.10 3.6.5-3
  • libsoup2.4 Ubuntu 22.04 LTS 2.74.2-3ubuntu0.6
  • libsoup2.4 Ubuntu 24.04 LTS 2.74.3-6ubuntu1.6
  • libsoup2.4 Ubuntu 26.04 LTS, Ubuntu 25.10 2.74.3-10.1ubuntu4
  • libsoup3 Ubuntu Pro 22.04 LTS 3.0.7-0ubuntu1+esm5
  • libsoup2.4 Ubuntu Pro 16.04 LTS 2.52.2-1ubuntu0.3+esm5
  • libsoup2.4 Ubuntu Pro 18.04 LTS 2.62.1-1ubuntu0.4+esm6

ubuntu advisories UBUNTU-CVE-2025-11021

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libsoup3 RHEL 10.1 3.6.5-3.el10_1.6
  • libsoup RHEL 9 2.72.0-12.el9_7.1
  • libsoup RHEL 9 2.72.0-10.el9_6.3
  • libsoup RHEL 8 2.62.3-10.el8_10
  • libsoup3 RHEL 10.0 3.6.5-3.el10_0.7
  • libsoup RHEL 8.2 AUS 2.62.3-1.el8_2.6
  • libsoup RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 2.62.3-2.el8_4.6
  • libsoup RHEL 8.8 E4S 2.62.3-3.el8_8.6

red hat advisories RHSA-2025:22013RHSA-2025:21772RHSA-2025:21665RHSA-2025:21666RHSA-2025:21664RHSA-2025:21657

  • libsoup SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3.6.5-160000.3.1
  • libsoup Linux Micro 6.0 3.4.2-9.1
  • libsoup Linux Micro 6.1 3.4.4-slfo.1.1_5.1
  • libsoup SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 3.4.4-150600.3.18.1
  • libsoup SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 3.0.4-150400.3.18.1

suse advisories SUSE-SU-2026:20205-1SUSE-SU-2026:20212-1SUSE-SU-2025:20937-1SUSE-SU-2025:20965-1SUSE-SU-2025:3753-1SUSE-SU-2025:3752-1

  • libsoup openSUSE Leap 16.0 3.6.5-160000.3.1
  • libsoup openSUSE Tumbleweed 3.6.5-7.1

opensuse advisories openSUSE-SU-2026:20142-1openSUSE-SU-2025:15633-1

  • libsoup AlmaLinux 9 2.72.0-12.el9_7.1
  • libsoup3 AlmaLinux 10 3.6.5-3.el10_1.6
  • libsoup AlmaLinux 8 2.62.3-10.el8_10

almalinux advisories ALSA-2025:20959ALSA-2025:21032ALSA-2025:19714

  • libsoup3 Rocky Linux 10 3.6.5-3.el10_1.6
  • libsoup Rocky Linux 9 2.72.0-12.el9_7.1
  • libsoup Rocky Linux 9 2.72.0-10.el9_6.3
  • libsoup Rocky Linux 8 2.62.3-10.el8_10
  • libsoup3 Rocky Linux 10 3.6.5-3.el10_0.7

rocky linux advisories RLSA-2025:21032RLSA-2025:20959RLSA-2025:19713RLSA-2025:19714RLSA-2025:18183

  • libsoup CBL-Mariner 2.0 3.0.4-10
  • libsoup Azure Linux 3.0 3.4.4-10

azure linux advisories AZL-67860AZL-67875

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-11021 updated cvss 7.5

libsoup: Out-of-Bounds Read in Cookie Date Handling of libsoup HTTP Library

  • Red Hat Enterprise Linux 6 libsoup
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) libsoup-devel 2.62.3-10.el8_10, libsoup-debuginfo 2.62.3-10.el8_10, libsoup-debugsource 2.62.3-10.el8_10
    fixed: vendor fix RHSA-2025:19714
  • Red Hat Enterprise Linux AppStream (v. 9) libsoup 2.72.0-10.el9_6.3, libsoup 2.72.0-12.el9_7.1
    fixed: vendor fix RHSA-2025:19713
  • Red Hat Enterprise Linux AppStream (v. 10) libsoup3 3.6.5-3.el10_0.7, libsoup3 3.6.5-3.el10_1.6
    fixed: vendor fix RHSA-2025:18183
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libsoup-devel 2.62.3-1.el8_2.6, libsoup-debuginfo 2.62.3-1.el8_2.6, libsoup-debugsource 2.62.3-1.el8_2.6
    fixed: vendor fix RHSA-2025:22013
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) libsoup-devel 2.62.3-2.el8_4.6, libsoup-debuginfo 2.62.3-2.el8_4.6, libsoup-debugsource 2.62.3-2.el8_4.6
    fixed: vendor fix RHSA-2025:21772
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) libsoup-devel 2.62.3-2.el8_6.6, libsoup-debuginfo 2.62.3-2.el8_6.6, libsoup-debugsource 2.62.3-2.el8_6.6 Red Hat Enterprise Linux AppStream E4S (v.8.6) libsoup-devel 2.62.3-2.el8_6.6, libsoup-debuginfo 2.62.3-2.el8_6.6, libsoup-debugsource 2.62.3-2.el8_6.6
    fixed: vendor fix RHSA-2025:21664
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) libsoup-devel 2.62.3-3.el8_8.6, libsoup-debuginfo 2.62.3-3.el8_8.6, libsoup-debugsource 2.62.3-3.el8_8.6
    fixed: vendor fix RHSA-2025:21665
show 14 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) libsoup 2.72.0-8.el9_0.6
    fixed: vendor fix RHSA-2025:21656
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) libsoup 2.72.0-8.el9_2.6
    fixed: vendor fix RHSA-2025:21655
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) libsoup 2.72.0-8.el9_4.6
    fixed: vendor fix RHSA-2025:21666
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) libsoup-devel 2.62.3-2.el8_4.6, libsoup-debuginfo 2.62.3-2.el8_4.6, libsoup-debugsource 2.62.3-2.el8_4.6
    fixed: vendor fix RHSA-2025:21772
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) libsoup-devel 2.62.3-2.el8_6.6, libsoup-debuginfo 2.62.3-2.el8_6.6, libsoup-debugsource 2.62.3-2.el8_6.6
    fixed: vendor fix RHSA-2025:21664
  • Red Hat Enterprise Linux BaseOS (v. 8) libsoup 2.62.3-10.el8_10
    fixed: vendor fix RHSA-2025:19714
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) libsoup 2.62.3-1.el8_2.6
    fixed: vendor fix RHSA-2025:22013
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) libsoup 2.62.3-2.el8_4.6
    fixed: vendor fix RHSA-2025:21772
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) libsoup 2.62.3-2.el8_6.6 Red Hat Enterprise Linux BaseOS E4S (v.8.6) libsoup 2.62.3-2.el8_6.6
    fixed: vendor fix RHSA-2025:21664
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) libsoup 2.62.3-3.el8_8.6
    fixed: vendor fix RHSA-2025:21665
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) libsoup 2.62.3-2.el8_4.6
    fixed: vendor fix RHSA-2025:21772
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) libsoup 2.62.3-2.el8_6.6
    fixed: vendor fix RHSA-2025:21664
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libsoup3-doc 3.6.5-3.el10_0.7, libsoup3-doc 3.6.5-3.el10_1.6
    fixed: vendor fix RHSA-2025:18183
  • Red Hat Enterprise Linux Server (v. 7 ELS) libsoup 2.62.2-9.el7_9
    fixed: vendor fix RHSA-2025:21657

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
13 mo ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.