{"cve":"CVE-2024-46857","nvd":{"published":"2024-09-27T13:15:17.277","modified":"2026-06-17T07:56:05.670","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix bridge mode operations when there are no VFs\n\nCurrently, trying to set the bridge mode attribute when numvfs=0 leads to a\ncrash:\n\nbridge link set dev eth2 hwmode vepa\n\n[  168.967392] BUG: kernel NULL pointer dereference, address: 0000000000000030\n[...]\n[  168.969989] RIP: 0010:mlx5_add_flow_rules+0x1f/0x300 [mlx5_core]\n[...]\n[  168.976037] Call Trace:\n[  168.976188]  <TASK>\n[  168.978620]  _mlx5_eswitch_set_vepa_locked+0x113/0x230 [mlx5_core]\n[  168.979074]  mlx5_eswitch_set_vepa+0x7f/0xa0 [mlx5_core]\n[  168.979471]  rtnl_bridge_setlink+0xe9/0x1f0\n[  168.979714]  rtnetlink_rcv_msg+0x159/0x400\n[  168.980451]  netlink_rcv_skb+0x54/0x100\n[  168.980675]  netlink_unicast+0x241/0x360\n[  168.980918]  netlink_sendmsg+0x1f6/0x430\n[  168.981162]  ____sys_sendmsg+0x3bb/0x3f0\n[  168.982155]  ___sys_sendmsg+0x88/0xd0\n[  168.985036]  __sys_sendmsg+0x59/0xa0\n[  168.985477]  do_syscall_64+0x79/0x150\n[  168.987273]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[  168.987773] RIP: 0033:0x7f8f7950f917\n\n(esw->fdb_table.legacy.vepa_fdb is null)\n\nThe bridge mode is only relevant when there are multiple functions per\nport. Therefore, prevent setting and getting this setting when there are no\nVFs.\n\nNote that after this change, there are no settings to change on the PF\ninterface using `bridge link` when there are no VFs, so the interface no\nlonger appears in the `bridge link` output.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/505ae01f75f839b54329164bbfecf24cc1361b31","https://git.kernel.org/stable/c/52c4beb79e095e0631b5cac46ed48a2aefe51985","https://git.kernel.org/stable/c/65feee671e37f3b6eda0b6af28f204b5bcf7fa50","https://git.kernel.org/stable/c/b1d305abef4640af1b4f1b4774d513cd81b10cfc","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:54:38.012257375+00:00"},"epss":{"cve":"CVE-2024-46857","score":0.00207,"percentile":0.10797,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}