Red Hat Security Advisory: kernel-rt security update
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: scsi: lpfc: Fix buffer free/clear order in deferred receive path (CVE-2025-39841) * kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory (CVE-2025-39883) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The Red Hat kernel-rt packages, which enable fine-tuning for real-time Linux systems, contain two security flaws. CVE-2025-39841 is a flaw in the SCSI lpfc driver related to the order of buffer free and clear operations in the deferred receive path. CVE-2025-39883 is a memory management issue where the kernel triggers a VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoisoning memory, indicating improper handling of poisoned pages. Red Hat has issued a security advisory (RHSA-2025:22995) providing updated kernel-rt packages for Red Hat Enterprise Linux 9.2 variants that address these vulnerabilities. The advisory states a moderate security impact and requires a system reboot to apply the fixes. No CVSS scores are provided in the advisory, and no exploits are currently known in the wild.
Potential Impact
The vulnerabilities affect the kernel-rt packages used in Red Hat Enterprise Linux 9.2 variants, potentially causing improper memory handling and buffer management in kernel subsystems. This could lead to system instability or other unintended behavior. Red Hat rates the impact as moderate. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated kernel-rt packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions and Extended Life Cycle 9.2 should apply the security update as described in Red Hat advisory RHSA-2025:22995. A system reboot is required for the update to take effect. Patch status is confirmed as available via the vendor advisory. No additional mitigation steps are indicated.
Red Hat Security Advisory: kernel-rt security update
Description
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: scsi: lpfc: Fix buffer free/clear order in deferred receive path (CVE-2025-39841) * kernel: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory (CVE-2025-39883) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat kernel-rt packages, which enable fine-tuning for real-time Linux systems, contain two security flaws. CVE-2025-39841 is a flaw in the SCSI lpfc driver related to the order of buffer free and clear operations in the deferred receive path. CVE-2025-39883 is a memory management issue where the kernel triggers a VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoisoning memory, indicating improper handling of poisoned pages. Red Hat has issued a security advisory (RHSA-2025:22995) providing updated kernel-rt packages for Red Hat Enterprise Linux 9.2 variants that address these vulnerabilities. The advisory states a moderate security impact and requires a system reboot to apply the fixes. No CVSS scores are provided in the advisory, and no exploits are currently known in the wild.
Potential Impact
The vulnerabilities affect the kernel-rt packages used in Red Hat Enterprise Linux 9.2 variants, potentially causing improper memory handling and buffer management in kernel subsystems. This could lead to system instability or other unintended behavior. Red Hat rates the impact as moderate. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Red Hat has released updated kernel-rt packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions and Extended Life Cycle 9.2 should apply the security update as described in Red Hat advisory RHSA-2025:22995. A system reboot is required for the update to take effect. Patch status is confirmed as available via the vendor advisory. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:22995
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-39883"]
- Cvss Version
- null
Threat ID: 6a3da1d94853345fc182864f
Added to database: 06/25/2026, 21:47:05 UTC
Last enriched: 06/25/2026, 22:19:07 UTC
Last updated: 06/29/2026, 02:51:10 UTC
Views: 9
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