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: Use-After-Free vulnerability in ATM subsystem (CVE-2025-38180) * kernel: Linux kernel:A use-after-free in bridge multicast in br_multicast_port_ctx_init (CVE-2025-38248) * kernel: smc: Fix use-after-free in __pnet_find_base_ndev() (CVE-2025-40064) * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168) * kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001) * kernel: macvlan: fix error recovery in macvlan_common_newlink() (CVE-2026-23209) * 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 kernel-rt packages for Red Hat Enterprise Linux provide a Real Time Linux Kernel for systems requiring high determinism. This advisory addresses several vulnerabilities: a use-after-free (UAF) in the ATM subsystem (CVE-2025-38180), a double free vulnerability in the exFAT filesystem that can cause denial of service (CVE-2025-38206), and a possible UAF in the macvlan_forward_source() function (CVE-2026-23001). These issues have been fixed in updated kernel-rt packages for Red Hat Enterprise Linux 9.2 Real Time. The vendor rates the overall security impact as low.
Potential Impact
Exploitation of these vulnerabilities could lead to use-after-free or double free conditions in kernel components, potentially causing system instability or denial of service. No known exploits are reported in the wild. The impact is considered low by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released updated kernel-rt packages that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.2 Real Time systems should apply the security update as described in the Red Hat advisory and reboot the system for the fixes to 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: Use-After-Free vulnerability in ATM subsystem (CVE-2025-38180) * kernel: Linux kernel:A use-after-free in bridge multicast in br_multicast_port_ctx_init (CVE-2025-38248) * kernel: smc: Fix use-after-free in __pnet_find_base_ndev() (CVE-2025-40064) * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168) * kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001) * kernel: macvlan: fix error recovery in macvlan_common_newlink() (CVE-2026-23209) * 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The kernel-rt packages for Red Hat Enterprise Linux provide a Real Time Linux Kernel for systems requiring high determinism. This advisory addresses several vulnerabilities: a use-after-free (UAF) in the ATM subsystem (CVE-2025-38180), a double free vulnerability in the exFAT filesystem that can cause denial of service (CVE-2025-38206), and a possible UAF in the macvlan_forward_source() function (CVE-2026-23001). These issues have been fixed in updated kernel-rt packages for Red Hat Enterprise Linux 9.2 Real Time. The vendor rates the overall security impact as low.
Potential Impact
Exploitation of these vulnerabilities could lead to use-after-free or double free conditions in kernel components, potentially causing system instability or denial of service. No known exploits are reported in the wild. The impact is considered low by Red Hat Product Security.
Mitigation Recommendations
Red Hat has released updated kernel-rt packages that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.2 Real Time systems should apply the security update as described in the Red Hat advisory and reboot the system for the fixes to 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-2026:6954
- Cve Count
- 7
- Additional Cves
- ["CVE-2025-38248","CVE-2025-40064","CVE-2025-40168","CVE-2025-71238","CVE-2026-23001","CVE-2026-23209"]
Threat ID: 6a160984e29bf47b50650c27
Added to database: 05/26/2026, 20:58:44 UTC
Last enriched: 07/12/2026, 10:46:07 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 183
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