Out-of-bounds Read in Red Hat Enterprise Linux 10
CVE-2025-11021
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (48.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Red Hat Enterprise Linux 10 — versions 0:3.6.5-3.el10_0.7, 0:3.6.5-3.el10_1.6
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7 Extended Lifecycle Support — versions 0:2.62.2-9.el7_9
- Red Hat Enterprise Linux 8 — versions 0:2.62.3-10.el8_10
- Red Hat Enterprise Linux 8.2 Advanced Update Support — versions 0:2.62.3-1.el8_2.6
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:2.62.3-2.el8_4.6
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On — versions 0:2.62.3-2.el8_4.6
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support — versions 0:2.62.3-2.el8_6.6
- Red Hat Enterprise Linux 8.6 Telecommunications Update Service — versions 0:2.62.3-2.el8_6.6
- Red Hat Enterprise Linux 8.6 Update Services For SAP Solutions — versions 0:2.62.3-2.el8_6.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2025:18183 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:19713 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:19714 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:20959 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:21032 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:21655 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:21656 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:21657 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:21664 (vendor-advisory)
- access.redhat.com/errata/RHSA-2025:21665 (vendor-advisory)
Frequently asked questions
- What is CVE-2025-11021?
- CVE-2025-11021 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2025-09-26.
- How severe is CVE-2025-11021?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-11021 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.