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: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193) * kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. (CVE-2025-71238) * kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402) * kernel: crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431) 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
This Red Hat security advisory addresses several vulnerabilities in the Linux kernel packages for Red Hat Enterprise Linux 8.4. Notably, CVE-2025-71238 is a double free vulnerability in the qla2xxx driver that can cause denial of service and potentially allow privilege escalation. Additional fixes include a use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193), a heap overflow in the NFSv4.0 LOCK replay cache (CVE-2026-31402), and a cryptographic algorithm interface issue (CVE-2026-31431). The advisory updates kernel packages to remediate these issues and requires a system reboot for the update to take effect.
Potential Impact
The vulnerabilities impact the Linux kernel in Red Hat Enterprise Linux 8.4, potentially allowing denial of service conditions and privilege escalation through kernel driver flaws. The double free vulnerability in the qla2xxx driver is particularly critical as it may allow attackers to escalate privileges. Other issues may lead to memory corruption or instability in kernel subsystems such as SCSI target, NFS, and cryptographic operations.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 8.4 should apply the provided kernel security update promptly and reboot their systems to ensure the fixes take effect. Detailed update instructions are available in the Red Hat advisory (RHSA-2026:14165). No alternative mitigations are indicated; patching and rebooting is required.
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: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193) * kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. (CVE-2025-71238) * kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402) * kernel: crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431) 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
This Red Hat security advisory addresses several vulnerabilities in the Linux kernel packages for Red Hat Enterprise Linux 8.4. Notably, CVE-2025-71238 is a double free vulnerability in the qla2xxx driver that can cause denial of service and potentially allow privilege escalation. Additional fixes include a use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193), a heap overflow in the NFSv4.0 LOCK replay cache (CVE-2026-31402), and a cryptographic algorithm interface issue (CVE-2026-31431). The advisory updates kernel packages to remediate these issues and requires a system reboot for the update to take effect.
Potential Impact
The vulnerabilities impact the Linux kernel in Red Hat Enterprise Linux 8.4, potentially allowing denial of service conditions and privilege escalation through kernel driver flaws. The double free vulnerability in the qla2xxx driver is particularly critical as it may allow attackers to escalate privileges. Other issues may lead to memory corruption or instability in kernel subsystems such as SCSI target, NFS, and cryptographic operations.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 8.4 should apply the provided kernel security update promptly and reboot their systems to ensure the fixes take effect. Detailed update instructions are available in the Red Hat advisory (RHSA-2026:14165). No alternative mitigations are indicated; patching and rebooting is required.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:14165
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-23193","CVE-2026-31402","CVE-2026-31431","CVE-2026-43077"]
- Cvss Version
- null
Threat ID: 6a16097ee29bf47b5064b004
Added to database: 05/26/2026, 20:58:38 UTC
Last enriched: 07/08/2026, 14:43:28 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 116
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