Red Hat Security Advisory: kernel security update
This advisory addresses two security vulnerabilities in the Linux kernel packages used by Red Hat Enterprise Linux 9 and related products. The first vulnerability (CVE-2025-39766) involves the network scheduler component where the cake_enqueue function did not properly handle conditions past the buffer limit. The second vulnerability (CVE-2025-68741) concerns improper freeing of a purex item in the SCSI qla2xxx driver. Red Hat has released an important security update that fixes these issues. The update requires a system reboot to take effect. No known exploits in the wild have been reported at this time.
AI Analysis
Technical Summary
Two vulnerabilities in the Linux kernel for Red Hat Enterprise Linux 9 are addressed in this security advisory. CVE-2025-39766 fixes the net/sched component by making cake_enqueue return NET_XMIT_CN when past the buffer limit, preventing improper behavior. CVE-2025-68741 fixes an issue in the SCSI qla2xxx driver related to improper freeing of a purex item, which could lead to memory management errors. These fixes are included in an updated kernel package that must be installed and the system rebooted to apply the changes.
Potential Impact
The vulnerabilities affect the Linux kernel, the core of the operating system, potentially impacting system stability or security. The advisory rates the update as Important, indicating a high severity level. However, there are no reports of exploitation in the wild. The issues could lead to improper network packet handling or memory management errors in the SCSI driver, which might be leveraged in targeted attacks or cause system crashes.
Mitigation Recommendations
Red Hat has released an official security update that addresses these vulnerabilities. Users should apply the updated kernel packages for Red Hat Enterprise Linux 9 and reboot their systems to ensure the fixes take effect. Detailed update instructions are available in the Red Hat advisory. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: kernel security update
Description
This advisory addresses two security vulnerabilities in the Linux kernel packages used by Red Hat Enterprise Linux 9 and related products. The first vulnerability (CVE-2025-39766) involves the network scheduler component where the cake_enqueue function did not properly handle conditions past the buffer limit. The second vulnerability (CVE-2025-68741) concerns improper freeing of a purex item in the SCSI qla2xxx driver. Red Hat has released an important security update that fixes these issues. The update requires a system reboot to take effect. No known exploits in the wild have been reported at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Two vulnerabilities in the Linux kernel for Red Hat Enterprise Linux 9 are addressed in this security advisory. CVE-2025-39766 fixes the net/sched component by making cake_enqueue return NET_XMIT_CN when past the buffer limit, preventing improper behavior. CVE-2025-68741 fixes an issue in the SCSI qla2xxx driver related to improper freeing of a purex item, which could lead to memory management errors. These fixes are included in an updated kernel package that must be installed and the system rebooted to apply the changes.
Potential Impact
The vulnerabilities affect the Linux kernel, the core of the operating system, potentially impacting system stability or security. The advisory rates the update as Important, indicating a high severity level. However, there are no reports of exploitation in the wild. The issues could lead to improper network packet handling or memory management errors in the SCSI driver, which might be leveraged in targeted attacks or cause system crashes.
Mitigation Recommendations
Red Hat has released an official security update that addresses these vulnerabilities. Users should apply the updated kernel packages for Red Hat Enterprise Linux 9 and reboot their systems to ensure the fixes take effect. Detailed update instructions are available in the Red Hat advisory. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:8921
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-68741"]
- Cvss Version
- null
Threat ID: 6a175eede29bf47b50edbbb1
Added to database: 5/27/2026, 9:15:25 PM
Last enriched: 5/27/2026, 9:19:41 PM
Last updated: 5/29/2026, 1:33:19 PM
Views: 14
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