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: nouveau: fix instmem race condition around ptr stores (CVE-2024-26984) * kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193) * kernel: kernel: Privilege escalation or denial of service via use-after-free in nf_tables_addchain() (CVE-2026-23231) * kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. (CVE-2025-71238) 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 security advisory (RHSA-2026:6572) addresses four vulnerabilities in the Real Time Linux Kernel: CVE-2024-26984 fixes a race condition in nouveau instmem pointer stores; CVE-2026-23193 fixes a use-after-free in iscsit_dec_session_usage_count(); CVE-2026-23231 fixes a use-after-free in nf_tables_addchain() that could lead to privilege escalation or denial of service; CVE-2025-71238 fixes a double free vulnerability in the qla2xxx driver that may cause denial of service and potential privilege escalation. These issues affect Red Hat Enterprise Linux 8 Real Time and NFV variants. The advisory provides updated kernel-rt packages and requires rebooting the system to apply the fixes.
Potential Impact
The vulnerabilities addressed could allow attackers to cause denial of service or escalate privileges on affected systems running the Real Time Linux Kernel. The issues include race conditions, use-after-free, and double free bugs, which are common sources of memory corruption and security risks. Red Hat rates the overall security impact as moderate.
Mitigation Recommendations
Red Hat has released updated kernel-rt packages that fix these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:6572 and reboot their systems to ensure the fixes take effect. No additional mitigations are specified or required beyond applying the official update.
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: nouveau: fix instmem race condition around ptr stores (CVE-2024-26984) * kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193) * kernel: kernel: Privilege escalation or denial of service via use-after-free in nf_tables_addchain() (CVE-2026-23231) * kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. (CVE-2025-71238) 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
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat kernel-rt security advisory (RHSA-2026:6572) addresses four vulnerabilities in the Real Time Linux Kernel: CVE-2024-26984 fixes a race condition in nouveau instmem pointer stores; CVE-2026-23193 fixes a use-after-free in iscsit_dec_session_usage_count(); CVE-2026-23231 fixes a use-after-free in nf_tables_addchain() that could lead to privilege escalation or denial of service; CVE-2025-71238 fixes a double free vulnerability in the qla2xxx driver that may cause denial of service and potential privilege escalation. These issues affect Red Hat Enterprise Linux 8 Real Time and NFV variants. The advisory provides updated kernel-rt packages and requires rebooting the system to apply the fixes.
Potential Impact
The vulnerabilities addressed could allow attackers to cause denial of service or escalate privileges on affected systems running the Real Time Linux Kernel. The issues include race conditions, use-after-free, and double free bugs, which are common sources of memory corruption and security risks. Red Hat rates the overall security impact as moderate.
Mitigation Recommendations
Red Hat has released updated kernel-rt packages that fix these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:6572 and reboot their systems to ensure the fixes take effect. No additional mitigations are specified or required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:6572
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-71238","CVE-2026-23193","CVE-2026-23231"]
- Cvss Version
- null
Threat ID: 6a160985e29bf47b50651d1f
Added to database: 05/26/2026, 20:58:45 UTC
Last enriched: 07/12/2026, 10:13:50 UTC
Last updated: 07/27/2026, 08:51:56 UTC
Views: 69
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