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.
References
Configurations
Configuration 1 (hide)
|
History
01 Oct 2024, 17:10
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/52c4beb79e095e0631b5cac46ed48a2aefe51985 - Patch | |
| References | () https://git.kernel.org/stable/c/b1d305abef4640af1b4f1b4774d513cd81b10cfc - Patch | |
| References | () https://git.kernel.org/stable/c/505ae01f75f839b54329164bbfecf24cc1361b31 - Patch | |
| References | () https://git.kernel.org/stable/c/65feee671e37f3b6eda0b6af28f204b5bcf7fa50 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:* |
|
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-476 |
27 Sep 2024, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-09-27 13:15
Updated : 2024-10-01 17:10
NVD link : CVE-2024-46857
Mitre link : CVE-2024-46857
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference