The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix deadlock in tc route     query code Cited commit causes ABBA deadlock[0] when peer flows are created while holding the devcom rw     semaphore. Due to peer flows offload implementation the lock is taken much higher up the call chain and     there is no obvious way to easily fix the deadlock. Instead, since tc route query code needs the peer     eswitch structure only to perform a lookup in xarray and doesn't perform any sleeping operations with it,     refactor the code for lockless execution in following ways: - RCUify the devcom 'data' pointer. When     resetting the pointer synchronously wait for RCU grace period before returning. This is fine since devcom     is currently only used for synchronization of pairing/unpairing of eswitches which is rare and already     expensive as-is. - Wrap all usages of 'paired' boolean in {READ|WRITE}_ONCE(). The flag has already been     used in some unlocked contexts without proper annotations (e.g. users of mlx5_devcom_is_paired()     function), but it wasn't an issue since all relevant code paths checked it again after obtaining the     devcom semaphore. Now it is also used by mlx5_devcom_get_peer_data_rcu() as best effort check to return     NULL when devcom is being unpaired. Note that while RCU read lock doesn't prevent the unpaired flag from     being changed concurrently it still guarantees that reader can continue to use 'data'. - Refactor     mlx5e_tc_query_route_vport() function to use new mlx5_devcom_get_peer_data_rcu() API which fixes the     deadlock. [0]: [ 164.599612] ====================================================== [ 164.600142] WARNING:
    possible circular locking dependency detected [ 164.600667] 6.3.0-rc3+ #1 Not tainted [ 164.601021]
    ------------------------------------------------------ [ 164.601557] handler1/3456 is trying to acquire     lock: [ 164.601998] ffff88811f1714b0 (&esw->offloads.encap_tbl_lock){+.+.}-{3:3}, at:
    mlx5e_attach_encap+0xd8/0x8b0 [mlx5_core] [ 164.603078] but task is already holding lock: [ 164.603617]     ffff88810137fc98 (&comp->sem){++++}-{3:3}, at: mlx5_devcom_get_peer_data+0x37/0x80 [mlx5_core] [     164.604459] which lock already depends on the new lock. [ 164.605190] the existing dependency chain (in     reverse order) is: [ 164.605848] -> #1 (&comp->sem){++++}-{3:3}: [ 164.606380] down_read+0x39/0x50 [     164.606772] mlx5_devcom_get_peer_data+0x37/0x80 [mlx5_core] [ 164.607336]     mlx5e_tc_query_route_vport+0x86/0xc0 [mlx5_core] [ 164.607914] mlx5e_tc_tun_route_lookup+0x1a4/0x1d0     [mlx5_core] [ 164.608495] mlx5e_attach_decap_route+0xc6/0x1e0 [mlx5_core] [ 164.609063]     mlx5e_tc_add_fdb_flow+0x1ea/0x360 [mlx5_core] [ 164.609627] __mlx5e_add_fdb_flow+0x2d2/0x430 [mlx5_core] [     164.610175] mlx5e_configure_flower+0x952/0x1a20 [mlx5_core] [ 164.610741] tc_setup_cb_add+0xd4/0x200 [     164.611146] fl_hw_replace_filter+0x14c/0x1f0 [cls_flower] [ 164.611661] fl_change+0xc95/0x18a0     [cls_flower] [ 164.612116] tc_new_tfilter+0x3fc/0xd20 [ 164.612516] rtnetlink_rcv_msg+0x418/0x5b0 [     164.612936] netlink_rcv_skb+0x54/0x100 [ 164.613339] netlink_unicast+0x190/0x250 [ 164.613746]     netlink_sendmsg+0x245/0x4a0 [ 164.614150] sock_sendmsg+0x38/0x60 [ 164.614522] ____sys_sendmsg+0x1d0/0x1e0     [ 164.614934] ___sys_sendmsg+0x80/0xc0 [ 164.615320] __sys_sendmsg+0x51/0x90 [ 164.615701]     do_syscall_64+0x3d/0x90 [ 164.616083] entry_SYSCALL_64_after_hwframe+0x46/0xb0 [ 164.616568] -> #0     (&esw->offloads.encap_tbl_lock){+.+.}-{3:3}: [ 164.617210] __lock_acquire+0x159e/0x26e0 [ 164.617638]     lock_acquire+0xc2/0x2a0 [ 164.618018] __mutex_lock+0x92/0xcd0 [ 164.618401] mlx5e_attach_encap+0xd8/0x8b0     [mlx5_core] [ 164.618943] post_process_attr+0x153/0x2d0 [ ---truncated--- (CVE-2023-53591)

Note that Nessus relies on the presence of the package as reported by the vendor.

Detections

Analytics

Linux Distros Unpatched Vulnerability : CVE-2023-53591

high Nessus Plugin ID 269339

Version 1.5