CVE-2025-11021: Red Hat Enterprise Linux 10 · Out-of-bounds Read
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade Red Hat Enterprise Linux 10 to 10.0.7 or 9.6.3 soon.
Data as of 26 Oct 2026, 08:30 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 10.0.7, 9.6.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 26 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Red Hat Enterprise Linux 10 to 10.0.7 or 9.6.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Red Hat Enterprise Linux 10 | Affected
| Fixed in
|
AI-suggested
Red Hat has released official security updates that fix this vulnerability in affected versions of libsoup and libsoup3 packages for Red Hat Enterprise Linux 9 and 10. Users should apply these updates promptly. Refer to Red Hat advisories RHSA-2025:18183 and RHSA-2025:19713 and the update instructions at https://access.redhat.com/articles/11258 for detailed remediation steps. No additional mitigations are indicated by the vendor advisory.
Description
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.
References
- access.redhat.com/errata/RHSA-2025:18183 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19713 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:19714 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:20959 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21032 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21655 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21656 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21657 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21664 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21665 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21666 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:21772 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:22013 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-11021 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2399627 (opens in a new tab)
- gitlab.gnome.org/GNOME/libsoup/-/issues/459 (opens in a new tab)