CVE-2025-4945: Libsoup: integer overflow in cookie expiration date handling in libsoup

Severity: low (CVSS 3.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-19 · updated 2026-06-30
Weakness: CWE-190

Description

A flaw was found in the cookie parsing logic of the libsoup HTTP library, used in GNOME applications and other software. The vulnerability arises when processing the expiration date of cookies, where a specially crafted value can trigger an integer overflow. This may result in undefined behavior, allowing an attacker to bypass cookie expiration logic, causing persistent or unintended cookie behavior. The issue stems from improper validation of large integer inputs during date arithmetic operations within the cookie parsing routines.

Affected products

Red Hat Enterprise Linux 10: all versions — fixed in 0:3.6.5-3.el10_0.9, 0:3.6.5-3.el10_1.6
Red Hat Enterprise Linux 7 Extended Lifecycle Support: all versions — fixed in 0:2.62.2-9.el7_9
Red Hat Enterprise Linux 8: all versions — fixed in 0:2.62.3-10.el8_10
Red Hat Enterprise Linux 8.2 Advanced Update Support: all versions — fixed in 0:2.62.3-1.el8_2.6
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:2.62.3-2.el8_4.6
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: all versions — fixed in 0:2.62.3-2.el8_4.6
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:2.62.3-2.el8_6.6
Red Hat Enterprise Linux 8.6 Telecommunications Update Service: all versions — fixed in 0:2.62.3-2.el8_6.6
Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions: all versions — fixed in 0:2.62.3-2.el8_6.6
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: all versions — fixed in 0:2.62.3-3.el8_8.6
Red Hat Enterprise Linux 9: all versions — fixed in 0:2.72.0-10.el9_6.3, 0:2.72.0-12.el9_7.1
Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions: all versions — fixed in 0:2.72.0-8.el9_0.6
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:2.72.0-8.el9_2.6
Red Hat Enterprise Linux 9.4 Extended Update Support: all versions — fixed in 0:2.72.0-8.el9_4.6

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:3.6.5-3.el10_0.9, 0:3.6.5-3.el10_1.6; Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.62.2-9.el7_9; Red Hat Enterprise Linux 8 0:2.62.3-10.el8_10; Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.6; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.6; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.62.3-2.el8_4.6; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.6; Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.6; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.6; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.62.3-3.el8_8.6; Red Hat Enterprise Linux 9 0:2.72.0-10.el9_6.3, 0:2.72.0-12.el9_7.1; Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.6. Check the vendor advisory for mitigations.

References

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