Red Hat Security Advisory: kernel-rt security update
A security update for the Red Hat kernel-rt package addresses multiple vulnerabilities including improper handling of IMA_DIGSIG flags, use-after-free in Bluetooth SCO, race conditions in TCP and nvmet-tcp subsystems, and double free errors in RDMA. These issues affect the Real Time Linux Kernel used for systems requiring high determinism. The update is rated as important by Red Hat and requires a system reboot to apply.
AI Analysis
Technical Summary
The Red Hat kernel-rt security advisory (RHSA-2026:35904) addresses five vulnerabilities in the Real Time Linux Kernel. These include CVE-2025-68183 where the IMA_DIGSIG flag is improperly cleared when setting or removing non-IMA extended attributes; CVE-2026-31408, a use-after-free in Bluetooth SCO due to missing sock_hold; CVE-2026-43198, a potential race condition in tcp_v6_syn_recv_sock; CVE-2026-46189, a double free on pvrdma_alloc_ucontext error path in RDMA; and CVE-2026-46135, a race condition between ICReq handling and queue teardown in nvmet-tcp. Red Hat has released updated kernel-rt packages for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions and Extended Life Cycle 9.2 to fix these issues. The advisory instructs users to apply the update and reboot systems to activate the fixes.
Potential Impact
These vulnerabilities could lead to improper security flag handling, use-after-free memory corruption, race conditions, and double free errors in kernel subsystems, potentially impacting system stability and security. The advisory rates the overall 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-rt packages that fix these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions and Extended Life Cycle 9.2 should apply the kernel-rt update as described in the Red Hat advisory (RHSA-2026:35904) and reboot their systems to ensure the fixes take effect. Patch status is confirmed as available via the official Red Hat update.
Red Hat Security Advisory: kernel-rt security update
Description
A security update for the Red Hat kernel-rt package addresses multiple vulnerabilities including improper handling of IMA_DIGSIG flags, use-after-free in Bluetooth SCO, race conditions in TCP and nvmet-tcp subsystems, and double free errors in RDMA. These issues affect the Real Time Linux Kernel used for systems requiring high determinism. The update is rated as important by Red Hat and requires a system reboot to apply.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat kernel-rt security advisory (RHSA-2026:35904) addresses five vulnerabilities in the Real Time Linux Kernel. These include CVE-2025-68183 where the IMA_DIGSIG flag is improperly cleared when setting or removing non-IMA extended attributes; CVE-2026-31408, a use-after-free in Bluetooth SCO due to missing sock_hold; CVE-2026-43198, a potential race condition in tcp_v6_syn_recv_sock; CVE-2026-46189, a double free on pvrdma_alloc_ucontext error path in RDMA; and CVE-2026-46135, a race condition between ICReq handling and queue teardown in nvmet-tcp. Red Hat has released updated kernel-rt packages for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions and Extended Life Cycle 9.2 to fix these issues. The advisory instructs users to apply the update and reboot systems to activate the fixes.
Potential Impact
These vulnerabilities could lead to improper security flag handling, use-after-free memory corruption, race conditions, and double free errors in kernel subsystems, potentially impacting system stability and security. The advisory rates the overall 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-rt packages that fix these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions and Extended Life Cycle 9.2 should apply the kernel-rt update as described in the Red Hat advisory (RHSA-2026:35904) and reboot their systems to ensure the fixes take effect. Patch status is confirmed as available via the official Red Hat update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:35904
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-31408","CVE-2026-43198","CVE-2026-46135","CVE-2026-46189"]
- Cvss Version
- null
Threat ID: 6a4c341c27e9c797195f87d9
Added to database: 07/06/2026, 23:02:52 UTC
Last enriched: 07/06/2026, 23:19:51 UTC
Last updated: 07/06/2026, 23:31:22 UTC
Views: 2
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