Linux · Security advisory · September 24, 2026
RLSA-2026:70403: kernel-rt security update
RLSA-2026:70403, released September 24, 2026, fixes 20 CVEs in kernel-rt (version 0:4.18.0-553.166.1.rt7.507.el8_10). One of them is being exploited (CVE-2025-39964); 1 on CISA KEV. Patch Radar priority: Patch now.
Patch now1 on CISA KEV
CVEs closed
20
3 rated Critical
Exploited
1
CVE-2025-39964
Exploitation more likely
0
Vendor assessment
Highest EPSS
0.0161
76th percentile
Priority of the 20 CVEs
Patch now 1
Urgent 3
High 16
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| kernel-rt | rocky 8 | 0:4.18.0-553.166.1.rt7.507.el8_10 |
CVEs this fix closes
| Priority | CVE | Title | Impact | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|---|
| Patch now | CVE-2025-39964 | crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg | 8.8 | 0.0161 | KEVExploited | |
| Urgent | CVE-2026-64534 | linux: In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: check INIT_FAILED before nvmet_req_un... | 9.8 | 0.0032 | None reported | |
| Urgent | CVE-2026-53053 | iommu/amd: Fix clone_alias() to use the original device's devid | 9.8 | 0.0013 | None reported | |
| Urgent | CVE-2026-53062 | dm cache policy smq: fix missing locks in invalidating cache blocks | 9.8 | 0.0010 | None reported | |
| High | CVE-2026-46133 | RDMA/rxe: Reject unknown opcodes before ICRC processing | 8.8 | 0.0057 | None reported | |
| High | CVE-2026-46043 | RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv | 9.1 | 0.0051 | None reported | |
| High | CVE-2026-63947 | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system | 8.8 | 0.0035 | None reported | |
| High | CVE-2023-54120 | linux: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix race condition in hidp_session_th... | 8.8 | 0.0031 | None reported | |
| High | CVE-2023-54214 | linux: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix potential user-after-free... | 8.8 | 0.0030 | None reported | |
| High | CVE-2026-43334 | kernel: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SMP: force responder MITM requirements... | 8.8 | 0.0028 | None reported | |
| High | CVE-2026-53254 | Bluetooth: RFCOMM: validate skb length in MCC handlers | 8.1 | 0.0028 | None reported | |
| High | CVE-2026-63975 | kernel-rt-64k-debug-core: The kernel packages contain the Linux kernel, the core of any Linux operating system | 8.8 | 0.0027 | None reported | |
| High | CVE-2026-53256 | kernel-rt-devel: The kernel packages contain the Linux kernel, the core of any Linux operating system | 8.1 | 0.0026 | None reported | |
| High | CVE-2026-52918 | Bluetooth: serialize accept_q access | 8.8 | 0.0022 | None reported | |
| High | CVE-2026-68188 | Bluetooth: RFCOMM: Fix session UAF in set_termios | 8.8 | 0.0022 | None reported | |
| High | CVE-2026-64582 | RDMA/rxe: Fix a use-after-free problem in rxe_mmap | 8.8 | 0.0017 | None reported | |
| High | CVE-2026-63823 | keys: Pin request_key_auth payload in instantiate paths | 8.8 | 0.0016 | None reported | |
| High | CVE-2025-71082 | Bluetooth: btusb: revert use of devm_kzalloc in btusb | 7.8 | 0.0015 | None reported | |
| High | CVE-2026-68293 | net/mlx5: Fix MCIA register buffer overflow on 32 dword reads | 8.8 | 0.0014 | None reported | |
| High | CVE-2026-45894 | iommu/vt-d: Clear Present bit before tearing down PASID entry | 8.8 | 0.0013 | None reported |
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