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: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry (CVE-2025-38472) * kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527) * kernel: sctp: linearize cloned gso packets in sctp_rcv (CVE-2025-38718) * kernel: tls: fix handling of zero-length records on the rx_list (CVE-2025-39682) * kernel: io_uring/futex: ensure io_futex_wait() cleans up properly on failure (CVE-2025-39698) 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
Red Hat issued a security advisory (RHSA-2025:16880) for Red Hat Enterprise Linux 9 kernel packages addressing five vulnerabilities: CVE-2025-38472 (netfilter nf_conntrack crash from uninitialized entry removal), CVE-2025-38527 (use-after-free in SMB client cifs_oplock_break), CVE-2025-38718 (SCTP cloned GSO packet linearization), CVE-2025-39682 (TLS zero-length record handling), and CVE-2025-39698 (io_uring/futex cleanup on failure). These kernel flaws could cause crashes, memory corruption, or improper resource handling. The advisory provides updated kernel packages for multiple architectures and variants of RHEL 9. The update must be installed and the system rebooted to mitigate the vulnerabilities. No known exploits in the wild have been reported at this time.
Potential Impact
The vulnerabilities affect critical kernel subsystems, potentially leading to system crashes, use-after-free memory corruption, or improper handling of network packets and synchronization primitives. While no active exploitation has been reported, successful exploitation could impact system stability and security. The overall severity is rated moderate by Red Hat.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users should apply the kernel update as provided in advisory RHSA-2025:16880 and reboot affected 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: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry (CVE-2025-38472) * kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527) * kernel: sctp: linearize cloned gso packets in sctp_rcv (CVE-2025-38718) * kernel: tls: fix handling of zero-length records on the rx_list (CVE-2025-39682) * kernel: io_uring/futex: ensure io_futex_wait() cleans up properly on failure (CVE-2025-39698) 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
Red Hat issued a security advisory (RHSA-2025:16880) for Red Hat Enterprise Linux 9 kernel packages addressing five vulnerabilities: CVE-2025-38472 (netfilter nf_conntrack crash from uninitialized entry removal), CVE-2025-38527 (use-after-free in SMB client cifs_oplock_break), CVE-2025-38718 (SCTP cloned GSO packet linearization), CVE-2025-39682 (TLS zero-length record handling), and CVE-2025-39698 (io_uring/futex cleanup on failure). These kernel flaws could cause crashes, memory corruption, or improper resource handling. The advisory provides updated kernel packages for multiple architectures and variants of RHEL 9. The update must be installed and the system rebooted to mitigate the vulnerabilities. No known exploits in the wild have been reported at this time.
Potential Impact
The vulnerabilities affect critical kernel subsystems, potentially leading to system crashes, use-after-free memory corruption, or improper handling of network packets and synchronization primitives. While no active exploitation has been reported, successful exploitation could impact system stability and security. The overall severity is rated moderate by Red Hat.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users should apply the kernel update as provided in advisory RHSA-2025:16880 and reboot affected 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-2025:16880
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-38527","CVE-2025-38718","CVE-2025-39682","CVE-2025-39698"]
- Cvss Version
- null
Threat ID: 6a3da1e24853345fc182c8a4
Added to database: 06/25/2026, 21:47:14 UTC
Last enriched: 06/25/2026, 22:29:46 UTC
Last updated: 07/01/2026, 23:59:45 UTC
Views: 12
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