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Vulnerability · Published Dec 9, 2025 · Assigned by Linux

CVE-2023-53811RDMA/irdma: Cap MSIX used to online CPUs + 1

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 91.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Cap MSIX used to online CPUs + 1 The irdma driver can use a maximum number of msix vectors equal to num_online_cpus() + 1 and the kernel warning stack below is shown if that number is exceeded. The kernel throws a warning as the driver tries to update the affinity hint with a CPU mask greater than the max CPU IDs. Fix this by capping the MSIX vectors to num_online_cpus() + 1. WARNING: CPU: 7 PID: 23655 at include/linux/cpumask.h:106 irdma_cfg_ceq_vector+0x34c/0x3f0 [irdma] RIP: 0010:irdma_cfg_ceq_vector+0x34c/0x3f0 [irdma] Call Trace: irdma_rt_init_hw+0xa62/0x1290 [irdma] ? irdma_alloc_local_mac_entry+0x1a0/0x1a0 [irdma] ? __is_kernel_percpu_address+0x63/0x310 ? rcu_read_lock_held_common+0xe/0xb0 ? irdma_lan_unregister_qset+0x280/0x280 [irdma] ? irdma_request_reset+0x80/0x80 [irdma] ? ice_get_qos_params+0x84/0x390 [ice] irdma_probe+0xa40/0xfc0 [irdma] ? rcu_read_lock_bh_held+0xd0/0xd0 ? irdma_remove+0x140/0x140 [irdma] ? rcu_read_lock_sched_held+0x62/0xe0 ? down_write+0x187/0x3d0 ? auxiliary_match_id+0xf0/0x1a0 ? irdma_remove+0x140/0x140 [irdma] auxiliary_bus_probe+0xa6/0x100 __driver_probe_device+0x4a4/0xd50 ? __device_attach_driver+0x2c0/0x2c0 driver_probe_device+0x4a/0x110 __driver_attach+0x1aa/0x350 bus_for_each_dev+0x11d/0x1b0 ? subsys_dev_iter_init+0xe0/0xe0 bus_add_driver+0x3b1/0x610 driver_register+0x18e/0x410 ? 0xffffffffc0b88000 irdma_init_module+0x50/0xaa [irdma] do_one_initcall+0x103/0x5f0 ? perf_trace_initcall_level+0x420/0x420 ? do_init_module+0x4e/0x700 ? __kasan_kmalloc+0x7d/0xa0 ? kmem_cache_alloc_trace+0x188/0x2b0 ? kasan_unpoison+0x21/0x50 do_init_module+0x1d1/0x700 load_module+0x3867/0x5260 ? layout_and_allocate+0x3990/0x3990 ? rcu_read_lock_held_common+0xe/0xb0 ? rcu_read_lock_sched_held+0x62/0xe0 ? rcu_read_lock_bh_held+0xd0/0xd0 ? __vmalloc_node_range+0x46b/0x890 ? lock_release+0x5c8/0xba0 ? alloc_vm_area+0x120/0x120 ? selinux_kernel_module_from_file+0x2a5/0x300 ? __inode_security_revalidate+0xf0/0xf0 ? __do_sys_init_module+0x1db/0x260 __do_sys_init_module+0x1db/0x260 ? load_module+0x5260/0x5260 ? do_syscall_64+0x22/0x450 do_syscall_64+0xa5/0x450 entry_SYSCALL_64_after_hwframe+0x66/0xdb

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.20-1DEBIAN-CVE-2023-53811
Debian:13linux6.1.20-1DEBIAN-CVE-2023-53811
Debian:14linux6.1.20-1DEBIAN-CVE-2023-53811
Ubuntu:22.04:LTSlinux5.15.0-75.82UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-aws5.15.0-1038.43UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-azure5.15.0-1040.47UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1041.48.1UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-gcp5.15.0-1036.44UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-gke5.15.0-1036.41UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1022.27UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-ibm5.15.0-1032.35UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1033.38UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-kvm5.15.0-1035.40UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-75.82UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1027.27UBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1015.15UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-oracle5.15.0-1037.43UBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-raspi5.15.0-1032.35UBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53811
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53811

Affected products (as reported)

VendorProductVersions
Linux Linux 44d9e52977a1b90b0db1c7f8b197c218e9226520 – before 87674a359ad173a3b8cd484e92e4f1901666da4c44d9e52977a1b90b0db1c7f8b197c218e9226520 – before b3bd44bf20cb3a6a47aa4373e1817147efb4be0444d9e52977a1b90b0db1c7f8b197c218e9226520 – before 209e4aa9a7b636d8aaa1297e1d089ee2ed91d73f44d9e52977a1b90b0db1c7f8b197c218e9226520 – before 9cd9842c46996ef62173c36619c746f57416bcb0
Linux Linux 5.14

References