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: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (CVE-2025-38499) * kernel: iommufd: Fix race during abort for file descriptors (CVE-2025-39966) * kernel: net: tun: Update napi->skb after XDP process (CVE-2025-39984) 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-2025:23250 covers three kernel vulnerabilities: CVE-2025-38499 fixes a privilege check in clone_private_mnt() to ensure the caller has CAP_SYS_ADMIN in the correct user namespace; CVE-2025-39966 addresses a race condition in the iommufd subsystem during abort of file descriptors; CVE-2025-39984 updates the napi->skb pointer after XDP processing in the tun network driver. These issues affect the Linux kernel core components in Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants. The advisory provides updated kernel packages that must be installed and followed by a system reboot to apply the fixes.
Potential Impact
The vulnerabilities could allow unauthorized privilege escalation or cause race conditions leading to potential system instability or security bypasses. Red Hat rates the overall security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated kernel packages addressing these vulnerabilities. Systems running Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants should apply the provided kernel update and reboot the system to activate the fixes. Refer to Red Hat's official update instructions at https://access.redhat.com/articles/11258 for detailed guidance.
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: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (CVE-2025-38499) * kernel: iommufd: Fix race during abort for file descriptors (CVE-2025-39966) * kernel: net: tun: Update napi->skb after XDP process (CVE-2025-39984) 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-2025:23250 covers three kernel vulnerabilities: CVE-2025-38499 fixes a privilege check in clone_private_mnt() to ensure the caller has CAP_SYS_ADMIN in the correct user namespace; CVE-2025-39966 addresses a race condition in the iommufd subsystem during abort of file descriptors; CVE-2025-39984 updates the napi->skb pointer after XDP processing in the tun network driver. These issues affect the Linux kernel core components in Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants. The advisory provides updated kernel packages that must be installed and followed by a system reboot to apply the fixes.
Potential Impact
The vulnerabilities could allow unauthorized privilege escalation or cause race conditions leading to potential system instability or security bypasses. Red Hat rates the overall security impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated kernel packages addressing these vulnerabilities. Systems running Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants should apply the provided kernel update and reboot the system to activate the fixes. Refer to Red Hat's official update instructions at https://access.redhat.com/articles/11258 for detailed guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:23250
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-39966","CVE-2025-39984"]
Threat ID: 6a3da1d84853345fc1828382
Added to database: 06/25/2026, 21:47:04 UTC
Last enriched: 06/25/2026, 22:18:20 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 57
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