跳转到帖子

Huawei EulerOS: CVE-2024-46857: kernel security update

recommended_posts

发布于
  • Members

Huawei EulerOS: CVE-2024-46857: kernel security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
09/27/2024
Created
12/13/2024
Added
12/12/2024
Modified
01/28/2025

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.

Solution(s)

  • huawei-euleros-2_0_sp12-upgrade-bpftool
  • huawei-euleros-2_0_sp12-upgrade-kernel
  • huawei-euleros-2_0_sp12-upgrade-kernel-abi-stablelists
  • huawei-euleros-2_0_sp12-upgrade-kernel-tools
  • huawei-euleros-2_0_sp12-upgrade-kernel-tools-libs
  • huawei-euleros-2_0_sp12-upgrade-python3-perf

References

  • https://attackerkb.com/topics/cve-2024-46857
  • CVE - 2024-46857
  • EulerOS-SA-2024-2953
  • 查看数 745
  • 已创建
  • 最后回复

参与讨论

你可立刻发布并稍后注册。 如果你有帐户,立刻登录发布帖子。

游客
回帖…