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Fencer Vulns
medium 6.5

CVE-2025-46420 json

Libsoup: memory leak on soup_header_parse_quality_list() via soup-headers.c

published 2025-04-24 18 mo ago modified 2026-11-05 3 d ago also EUVD-2025-12110

cvss
6.5
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 48%
public exploits
0
none known

Summary

A flaw was found in libsoup. It is vulnerable to memory leaks in the soup_header_parse_quality_list() function when parsing a quality list that contains elements with all zeroes.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 8 0:2.62.3-8.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.4
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.4
  • Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:2.62.3-2.el8_4.4
  • Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:2.62.3-2.el8_4.4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.4
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.4
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.4
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:2.62.3-3.el8_8.4
  • Red Hat Red Hat Enterprise Linux 9 0:2.72.0-10.el9_6.1
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.4
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:2.72.0-8.el9_2.4
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:2.72.0-8.el9_4.4
  • libsoup3 Debian 12 3.2.3-0+deb12u1
  • libsoup3 Debian 13 3.6.4-1
  • libsoup2.4 Debian 13 2.74.3-10.1

debian advisories DEBIAN-CVE-2025-46420

  • libsoup3 Ubuntu 24.04 LTS 3.4.4-5ubuntu0.3
  • libsoup2.4 Ubuntu 20.04 LTS 2.70.0-1ubuntu0.3
  • libsoup2.4 Ubuntu 22.04 LTS 2.74.2-3ubuntu0.3
  • libsoup2.4 Ubuntu 24.04 LTS 2.74.3-6ubuntu1.3
  • libsoup3 Ubuntu Pro 22.04 LTS 3.0.7-0ubuntu1+esm3
  • libsoup2.4 Ubuntu Pro 16.04 LTS 2.52.2-1ubuntu0.3+esm1
  • libsoup2.4 Ubuntu Pro 18.04 LTS 2.62.1-1ubuntu0.4+esm2

ubuntu advisories UBUNTU-CVE-2025-46420

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

  • libsoup RHEL 9 2.72.0-10.el9_6.1
  • libsoup RHEL 8 2.62.3-8.el8_10
  • libsoup RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 2.62.3-2.el8_6.4
  • libsoup RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 2.62.3-2.el8_4.4
  • libsoup RHEL 8.8 EUS 2.62.3-3.el8_8.4
  • libsoup RHEL 8.2 AUS 2.62.3-1.el8_2.4
  • libsoup RHEL 9.2 EUS 2.72.0-8.el9_2.4
  • libsoup RHEL 9.4 EUS 2.72.0-8.el9_4.4

red hat advisories RHSA-2025:7436RHSA-2025:4624RHSA-2025:4609RHSA-2025:4568RHSA-2025:4560RHSA-2025:4538

  • libsoup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +8 more 2.74.3-150400.3.40.1
  • libsoup Linux Micro 6.1 3.4.4-slfo.1.1_3.1
  • libsoup SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 3.4.4-150600.3.7.1
  • libsoup2 SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.74.3-150600.4.6.1
  • libsoup Linux Micro 6.0 3.4.2-6.1
  • libsoup SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +2 more 2.68.4-150200.4.6.1
  • libsoup SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 3.0.4-150400.3.7.1
  • libsoup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +10 more 2.74.2-150400.3.6.1

suse advisories SUSE-SU-2026:3936-1SUSE-SU-2025:20446-1SUSE-SU-2025:01504-1SUSE-SU-2025:01503-1SUSE-SU-2025:20375-1SUSE-SU-2025:1519-1

  • libsoup2 openSUSE Tumbleweed 2.74.3-9.1

opensuse advisories openSUSE-SU-2025:15044-1

  • libsoup AlmaLinux 9 2.72.0-10.el9_6.1
  • libsoup AlmaLinux 8 2.62.3-8.el8_10

almalinux advisories ALSA-2025:7436ALSA-2025:4560

  • libsoup Rocky Linux 8 2.62.3-8.el8_10

rocky linux advisories RLSA-2025:4560

  • libsoup CBL-Mariner 2.0 3.0.4-6
  • libsoup Azure Linux 3.0 3.4.4-6

azure linux advisories AZL-61567AZL-61615

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-2025-46420 updated cvss 6.5

libsoup: Memory leak on soup_header_parse_quality_list() via soup-headers.c

  • Red Hat Enterprise Linux 6 libsoup Red Hat Enterprise Linux 7 libsoup
    affected: workaround, no fix planned “Currently, no mitigation is available for this vulnerability.”
  • Red Hat Enterprise Linux AppStream (v. 8) libsoup-devel 2.62.3-8.el8_10, libsoup-debuginfo 2.62.3-8.el8_10, libsoup-debugsource 2.62.3-8.el8_10
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4560
  • Red Hat Enterprise Linux AppStream (v. 9) libsoup 2.72.0-10.el9_6.1
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:7436
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libsoup-devel 2.62.3-1.el8_2.4, libsoup-debuginfo 2.62.3-1.el8_2.4, libsoup-debugsource 2.62.3-1.el8_2.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4538
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) libsoup-devel 2.62.3-2.el8_4.4, libsoup-debuginfo 2.62.3-2.el8_4.4, libsoup-debugsource 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) libsoup-devel 2.62.3-2.el8_6.4, libsoup-debuginfo 2.62.3-2.el8_6.4, libsoup-debugsource 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) libsoup-devel 2.62.3-2.el8_4.4, libsoup-debuginfo 2.62.3-2.el8_4.4, libsoup-debugsource 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux AppStream E4S (v.8.6) libsoup-devel 2.62.3-2.el8_6.4, libsoup-debuginfo 2.62.3-2.el8_6.4, libsoup-debugsource 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
show 16 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) libsoup 2.72.0-8.el9_0.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4439
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) libsoup-devel 2.62.3-3.el8_8.4, libsoup-debuginfo 2.62.3-3.el8_8.4, libsoup-debugsource 2.62.3-3.el8_8.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4568
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) libsoup 2.72.0-8.el9_2.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4508
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) libsoup 2.72.0-8.el9_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4440
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) libsoup-devel 2.62.3-2.el8_4.4, libsoup-debuginfo 2.62.3-2.el8_4.4, libsoup-debugsource 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) libsoup-devel 2.62.3-2.el8_6.4, libsoup-debuginfo 2.62.3-2.el8_6.4, libsoup-debugsource 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux BaseOS (v. 8) libsoup 2.62.3-8.el8_10
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4560
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) libsoup 2.62.3-1.el8_2.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4538
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) libsoup 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) libsoup 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux BaseOS E4S (v.8.4) libsoup 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux BaseOS E4S (v.8.6) libsoup 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) libsoup 2.62.3-3.el8_8.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4568
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4) libsoup 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) libsoup 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux 10 libsoup3
    not affected: vulnerable code not present

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
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • 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 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  • 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 Extended Update Support
  • 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 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

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.