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: Linux kernel: Local denial of service and memory leak in DAMON sysfs via setup failure (CVE-2026-23144) * kernel: Linux kernel: Use-after-free in bonding module can cause system crash or arbitrary code execution (CVE-2026-23171) * kernel: net/sched: cls_u32: use skb_header_pointer_careful() (CVE-2026-23204) * 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 advisory covers four Linux kernel vulnerabilities affecting Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants. CVE-2026-23144 involves a local denial of service and memory leak in the DAMON sysfs interface due to setup failure. CVE-2026-23171 is a use-after-free vulnerability in the bonding module that may cause system crashes or arbitrary code execution. CVE-2026-23204 addresses a fix in the net/sched cls_u32 component to use skb_header_pointer_careful(). CVE-2025-71238 is a double free vulnerability in the qla2xxx driver that can result in denial of service and potential privilege escalation. Red Hat has released updated kernel packages to fix these vulnerabilities, and a reboot is necessary to apply the changes.
Potential Impact
Successful exploitation of these vulnerabilities can lead to local denial of service conditions, memory leaks, system crashes, arbitrary code execution, and potential privilege escalation on affected systems running the specified Red Hat Enterprise Linux 10.0 Extended Update Support kernels. The overall security impact is rated as moderate by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:8342 and reboot their systems to ensure the fixes take effect. No additional mitigation steps are indicated by the vendor.
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: Linux kernel: Local denial of service and memory leak in DAMON sysfs via setup failure (CVE-2026-23144) * kernel: Linux kernel: Use-after-free in bonding module can cause system crash or arbitrary code execution (CVE-2026-23171) * kernel: net/sched: cls_u32: use skb_header_pointer_careful() (CVE-2026-23204) * 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 advisory covers four Linux kernel vulnerabilities affecting Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants. CVE-2026-23144 involves a local denial of service and memory leak in the DAMON sysfs interface due to setup failure. CVE-2026-23171 is a use-after-free vulnerability in the bonding module that may cause system crashes or arbitrary code execution. CVE-2026-23204 addresses a fix in the net/sched cls_u32 component to use skb_header_pointer_careful(). CVE-2025-71238 is a double free vulnerability in the qla2xxx driver that can result in denial of service and potential privilege escalation. Red Hat has released updated kernel packages to fix these vulnerabilities, and a reboot is necessary to apply the changes.
Potential Impact
Successful exploitation of these vulnerabilities can lead to local denial of service conditions, memory leaks, system crashes, arbitrary code execution, and potential privilege escalation on affected systems running the specified Red Hat Enterprise Linux 10.0 Extended Update Support kernels. The overall security impact is rated as moderate by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:8342 and reboot their systems to ensure the fixes take effect. 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-2026:8342
- Cve Count
- 4
- Additional Cves
- ["CVE-2026-23144","CVE-2026-23171","CVE-2026-23204"]
- Cvss Version
- null
Threat ID: 6a160983e29bf47b5064fec0
Added to database: 05/26/2026, 20:58:43 UTC
Last enriched: 07/12/2026, 10:49:07 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 74
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