CVE-2024-46857— net/mlx5: Fix bridge mode operations when there are no VFs
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I. Basic Information for CVE-2024-46857
Vulnerability Information
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Vulnerability Title
net/mlx5: Fix bridge mode operations when there are no VFs
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix bridge mode operations when there are no VFs Currently, trying to set the bridge mode attribute when numvfs=0 leads to a crash: bridge link set dev eth2 hwmode vepa [ 168.967392] BUG: kernel NULL pointer dereference, address: 0000000000000030 [...] [ 168.969989] RIP: 0010:mlx5_add_flow_rules+0x1f/0x300 [mlx5_core] [...] [ 168.976037] Call Trace: [ 168.976188] <TASK> [ 168.978620] _mlx5_eswitch_set_vepa_locked+0x113/0x230 [mlx5_core] [ 168.979074] mlx5_eswitch_set_vepa+0x7f/0xa0 [mlx5_core] [ 168.979471] rtnl_bridge_setlink+0xe9/0x1f0 [ 168.979714] rtnetlink_rcv_msg+0x159/0x400 [ 168.980451] netlink_rcv_skb+0x54/0x100 [ 168.980675] netlink_unicast+0x241/0x360 [ 168.980918] netlink_sendmsg+0x1f6/0x430 [ 168.981162] ____sys_sendmsg+0x3bb/0x3f0 [ 168.982155] ___sys_sendmsg+0x88/0xd0 [ 168.985036] __sys_sendmsg+0x59/0xa0 [ 168.985477] do_syscall_64+0x79/0x150 [ 168.987273] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 168.987773] RIP: 0033:0x7f8f7950f917 (esw->fdb_table.legacy.vepa_fdb is null) The bridge mode is only relevant when there are multiple functions per port. Therefore, prevent setting and getting this setting when there are no VFs. Note that after this change, there are no settings to change on the PF interface using `bridge link` when there are no VFs, so the interface no longer appears in the `bridge link` output.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理没有VFs的情况。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-46857
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Same Patch Batch · Linux · 2024-09-27 · 66 CVEs total
| CVE-2024-46844 | um: line: always fill *error_out in setup_one_line() | |
| CVE-2024-46865 | fou: fix initialization of grc | |
| CVE-2024-46864 | x86/hyperv: fix kexec crash due to VP assist page corruption | |
| CVE-2024-46863 | ASoC: Intel: soc-acpi-intel-lnl-match: add missing empty item | |
| CVE-2024-46852 | dma-buf: heaps: Fix off-by-one in CMA heap fault handler | |
| CVE-2024-46850 | drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct() | |
| CVE-2024-46849 | ASoC: meson: axg-card: fix 'use-after-free' | |
| CVE-2024-46848 | perf/x86/intel: Limit the period on Haswell | |
| CVE-2024-46847 | mm: vmalloc: ensure vmap_block is initialised before adding to queue | |
| CVE-2024-46846 | spi: rockchip: Resolve unbalanced runtime PM / system PM handling | |
| CVE-2024-46851 | drm/amd/display: Avoid race between dcn10_set_drr() and dc_state_destruct() | |
| CVE-2024-46845 | tracing/timerlat: Only clear timer if a kthread exists | |
| CVE-2024-46843 | scsi: ufs: core: Remove SCSI host only if added | |
| CVE-2024-46841 | btrfs: don't BUG_ON on ENOMEM from btrfs_lookup_extent_info() in walk_down_proc() | |
| CVE-2024-46842 | scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info | |
| CVE-2024-46840 | btrfs: clean up our handling of refs == 0 in snapshot delete | |
| CVE-2024-46838 | userfaultfd: don't BUG_ON() if khugepaged yanks our page table | |
| CVE-2024-46837 | drm/panthor: Restrict high priorities on group_create | |
| CVE-2024-46835 | drm/amdgpu: Fix smatch static checker warning | |
| CVE-2024-46836 | usb: gadget: aspeed_udc: validate endpoint index for ast udc |
Showing top 20 of 66 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
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