{"id":"CVE-2025-21717","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: add missing cpu_to_node to kvzalloc_node in mlx5e_open_xdpredirect_sq\n\nkvzalloc_node is not doing a runtime check on the node argument\n(__alloc_pages_node_no…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: add missing cpu_to_node to kvzalloc_node in mlx5e_open_xdpredirect_sq\n\nkvzalloc_node is not doing a runtime check on the node argument\n(__alloc_pages_node_no…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-125"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.13, < 6.13.2"],"patched":["linux_kernel 6.13.2"],"published":"2025-02-27","updated":"2026-07-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-21717","references":[{"url":"https://git.kernel.org/stable/c/979284535aaf12a287a2f43d9d5dfcbdc1dc4cac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a275db45b4161d01716559dd7557db9ea0450952","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00173,"epssPercentile":0.07008,"ingestedAt":"2026-07-30T06:53:09.404Z","slug":"CVE-2025-21717","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: add missing cpu_to_node to kvzalloc_node in mlx5e_open_xdpredirect_sq\n\nkvzalloc_node is not doing a runtime check on the node argument\n(__alloc_pages_node_noprof does have a VM_BUG_ON, but it expands to\nnothing on !CONFIG_DEBUG_VM builds), so doing any ethtool/netlink\noperation that calls mlx5e_open on a CPU that's larger that MAX_NUMNODES\ntriggers OOB access and panic (see the trace below).\n\nAdd missing cpu_to_node call to convert cpu id to node id.\n\n[  165.427394] mlx5_core 0000:5c:00.0 beth1: Link up\n[  166.479327] BUG: unable to handle page fault for address: 0000000800000010\n[  166.494592] #PF: supervisor read access in kernel mode\n[  166.505995] #PF: error_code(0x0000) - not-present page\n...\n[  166.816958] Call Trace:\n[  166.822380]  <TASK>\n[  166.827034]  ? __die_body+0x64/0xb0\n[  166.834774]  ? page_fault_oops+0x2cd/0x3f0\n[  166.843862]  ? exc_page_fault+0x63/0x130\n[  166.852564]  ? asm_exc_page_fault+0x22/0x30\n[  166.861843]  ? __kvmalloc_node_noprof+0x43/0xd0\n[  166.871897]  ? get_partial_node+0x1c/0x320\n[  166.880983]  ? deactivate_slab+0x269/0x2b0\n[  166.890069]  ___slab_alloc+0x521/0xa90\n[  166.898389]  ? __kvmalloc_node_noprof+0x43/0xd0\n[  166.908442]  __kmalloc_node_noprof+0x216/0x3f0\n[  166.918302]  ? __kvmalloc_node_noprof+0x43/0xd0\n[  166.928354]  __kvmalloc_node_noprof+0x43/0xd0\n[  166.938021]  mlx5e_open_channels+0x5e2/0xc00\n[  166.947496]  mlx5e_open_locked+0x3e/0xf0\n[  166.956201]  mlx5e_open+0x23/0x50\n[  166.963551]  __dev_open+0x114/0x1c0\n[  166.971292]  __dev_change_flags+0xa2/0x1b0\n[  166.980378]  dev_change_flags+0x21/0x60\n[  166.988887]  do_setlink+0x38d/0xf20\n[  166.996628]  ? ep_poll_callback+0x1b9/0x240\n[  167.005910]  ? __nla_validate_parse.llvm.10713395753544950386+0x80/0xd70\n[  167.020782]  ? __wake_up_sync_key+0x52/0x80\n[  167.030066]  ? __mutex_lock+0xff/0x550\n[  167.038382]  ? security_capable+0x50/0x90\n[  167.047279]  rtnl_setlink+0x1c9/0x210\n[  167.055403]  ? ep_poll_callback+0x1b9/0x240\n[  167.064684]  ? security_capable+0x50/0x90\n[  167.073579]  rtnetlink_rcv_msg+0x2f9/0x310\n[  167.082667]  ? rtnetlink_bind+0x30/0x30\n[  167.091173]  netlink_rcv_skb+0xb1/0xe0\n[  167.099492]  netlink_unicast+0x20f/0x2e0\n[  167.108191]  netlink_sendmsg+0x389/0x420\n[  167.116896]  __sys_sendto+0x158/0x1c0\n[  167.125024]  __x64_sys_sendto+0x22/0x30\n[  167.133534]  do_syscall_64+0x63/0x130\n[  167.141657]  ? __irq_exit_rcu.llvm.17843942359718260576+0x52/0xd0\n[  167.155181]  entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\n## Affected\n\n- `linux_kernel >= 6.13, < 6.13.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.13.2`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}