What’s Vulnerable › Vulnerabilities

CVE-2025-46420: Libsoup: memory leak on soup_header_parse_quality_list() via soup-headers.c

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-24 · updated 2026-06-30
• Weakness: CWE-401

Description

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.

Affected products

• Red Hat Enterprise Linux 8: all versions — fixed in 0:2.62.3-8.el8_10
• Red Hat Enterprise Linux 8.2 Advanced Update Support: all versions — fixed in 0:2.62.3-1.el8_2.4
• Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:2.62.3-2.el8_4.4
• Red Hat Enterprise Linux 8.4 Telecommunications Update Service: all versions — fixed in 0:2.62.3-2.el8_4.4
• Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions: all versions — fixed in 0:2.62.3-2.el8_4.4
• Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:2.62.3-2.el8_6.4
• Red Hat Enterprise Linux 8.6 Telecommunications Update Service: all versions — fixed in 0:2.62.3-2.el8_6.4
• Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions: all versions — fixed in 0:2.62.3-2.el8_6.4
• Red Hat Enterprise Linux 8.8 Extended Update Support: all versions — fixed in 0:2.62.3-3.el8_8.4
• Red Hat Enterprise Linux 9: all versions — fixed in 0:2.72.0-10.el9_6.1
• Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions: all versions — fixed in 0:2.72.0-8.el9_0.4
• Red Hat Enterprise Linux 9.2 Extended Update Support: all versions — fixed in 0:2.72.0-8.el9_2.4
• Red Hat Enterprise Linux 9.4 Extended Update Support: all versions — fixed in 0:2.72.0-8.el9_4.4

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 8 0:2.62.3-8.el8_10; Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.4; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.4; Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:2.62.3-2.el8_4.4; Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:2.62.3-2.el8_4.4; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.4; Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.4; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.4; Red Hat Enterprise Linux 8.8 Extended Update Support 0:2.62.3-3.el8_8.4; Red Hat Enterprise Linux 9 0:2.72.0-10.el9_6.1; Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.4; Red Hat Enterprise Linux 9.2 Extended Update Support 0:2.72.0-8.el9_2.4. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2025:4439
• https://access.redhat.com/errata/RHSA-2025:4440
• https://access.redhat.com/errata/RHSA-2025:4508
• https://access.redhat.com/errata/RHSA-2025:4538
• https://access.redhat.com/errata/RHSA-2025:4560
• https://access.redhat.com/errata/RHSA-2025:4568
• https://access.redhat.com/errata/RHSA-2025:4609
• https://access.redhat.com/errata/RHSA-2025:4624
• https://access.redhat.com/errata/RHSA-2025:7436
• https://access.redhat.com/security/cve/CVE-2025-46420
• https://bugzilla.redhat.com/show_bug.cgi?id=2361963
• https://gitlab.gnome.org/GNOME/libsoup/-/issues/438

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