Red Hat Security Advisory: kernel security update
The kernel packages contain the Linux kernel, the core of any Linux operating system. 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 security advisory RHSA-2026:6571 addresses four kernel vulnerabilities in Red Hat Enterprise Linux 8. CVE-2024-26984 fixes a race condition in the nouveau driver's instmem pointer stores. CVE-2026-23193 resolves a use-after-free in the iscsi target's iscsit_dec_session_usage_count() function. CVE-2026-23231 patches 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 can cause denial of service and potential privilege escalation. Red Hat has released updated kernel packages to address these issues, requiring a system reboot for the fixes to take effect.
Potential Impact
The vulnerabilities collectively allow for potential privilege escalation and denial of service on affected Red Hat Enterprise Linux 8 systems. The race condition and use-after-free flaws can lead to unstable kernel behavior or unauthorized privilege gains. The double free vulnerability may cause system crashes or escalation of privileges. These impacts affect the core Linux kernel, which is critical for system security and stability.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:6571 and reboot their systems to ensure the fixes take effect. No additional mitigation steps are indicated beyond applying the official update and rebooting.
Red Hat Security Advisory: kernel security update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system. 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 security advisory RHSA-2026:6571 addresses four kernel vulnerabilities in Red Hat Enterprise Linux 8. CVE-2024-26984 fixes a race condition in the nouveau driver's instmem pointer stores. CVE-2026-23193 resolves a use-after-free in the iscsi target's iscsit_dec_session_usage_count() function. CVE-2026-23231 patches 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 can cause denial of service and potential privilege escalation. Red Hat has released updated kernel packages to address these issues, requiring a system reboot for the fixes to take effect.
Potential Impact
The vulnerabilities collectively allow for potential privilege escalation and denial of service on affected Red Hat Enterprise Linux 8 systems. The race condition and use-after-free flaws can lead to unstable kernel behavior or unauthorized privilege gains. The double free vulnerability may cause system crashes or escalation of privileges. These impacts affect the core Linux kernel, which is critical for system security and stability.
Mitigation Recommendations
Red Hat has released updated kernel packages that fix these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:6571 and reboot their systems to ensure the fixes take effect. No additional mitigation steps are indicated beyond applying the official update and rebooting.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:6571
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-71238","CVE-2026-23193","CVE-2026-23231"]
- Cvss Version
- null
Threat ID: 6a160983e29bf47b5064fefc
Added to database: 05/26/2026, 20:58:43 UTC
Last enriched: 07/12/2026, 10:13:57 UTC
Last updated: 07/31/2026, 19:22:51 UTC
Views: 87
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