In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free of encap entry in neigh update handler Function mlx5e_rep_neigh_update() wasn't updated to accommodate rtnl lock removal from TC filter update path and properly handle concurrent encap entry insertion/deletion which can lead to following use-after-free: [23827.464923] ================================================================== [23827.469446] BUG: KASAN: use-after-free in mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.470971] Read of size 4 at addr ffff8881d132228c by task kworker/u20:6/21635 [23827.472251] [23827.472615] CPU: 9 PID: 21635 Comm: kworker/u20:6 Not tainted 5.13.0-rc3+ #5 [23827.473788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [23827.475639] Workqueue: mlx5e mlx5e_rep_neigh_update [mlx5_core] [23827.476731] Call Trace: [23827.477260] dump_stack+0xbb/0x107 [23827.477906] print_address_description.constprop.0+0x18/0x140 [23827.478896] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.479879] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.480905] kasan_report.cold+0x7c/0xd8 [23827.481701] ? mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.482744] kasan_check_range+0x145/0x1a0 [23827.493112] mlx5e_encap_take+0x72/0x140 [mlx5_core] [23827.494054] ? mlx5e_tc_tun_encap_info_equal_generic+0x140/0x140 [mlx5_core] [23827.495296] mlx5e_rep_neigh_update+0x41e/0x5e0 [mlx5_core] [23827.496338] ? mlx5e_rep_neigh_entry_release+0xb80/0xb80 [mlx5_core] [23827.497486] ? read_word_at_a_time+0xe/0x20 [23827.498250] ? strscpy+0xa0/0x2a0 [23827.498889] process_one_work+0x8ac/0x14e0 [23827.499638] ? lockdep_hardirqs_on_prepare+0x400/0x400 [23827.500537] ? pwq_dec_nr_in_flight+0x2c0/0x2c0 [23827.501359] ? rwlock_bug.part.0+0x90/0x90 [23827.502116] worker_thread+0x53b/0x1220 [23827.502831] ? process_one_work+0x14e0/0x14e0 [23827.503627] kthread+0x328/0x3f0 [23827.504254] ? _raw_spin_unlock_irq+0x24/0x40 [23827.505065] ? __kthread_bind_mask+0x90/0x90 [23827.505912] ret_from_fork+0x1f/0x30 [23827.506621] [23827.506987] Allocated by task 28248: [23827.507694] kasan_save_stack+0x1b/0x40 [23827.508476] __kasan_kmalloc+0x7c/0x90 [23827.509197] mlx5e_attach_encap+0xde1/0x1d40 [mlx5_core] [23827.510194] mlx5e_tc_add_fdb_flow+0x397/0xc40 [mlx5_core] [23827.511218] __mlx5e_add_fdb_flow+0x519/0xb30 [mlx5_core] [23827.512234] mlx5e_configure_flower+0x191c/0x4870 [mlx5_core] [23827.513298] tc_setup_cb_add+0x1d5/0x420 [23827.514023] fl_hw_replace_filter+0x382/0x6a0 [cls_flower] [23827.514975] fl_change+0x2ceb/0x4a51 [cls_flower] [23827.515821] tc_new_tfilter+0x89a/0x2070 [23827.516548] rtnetlink_rcv_msg+0x644/0x8c0 [23827.517300] netlink_rcv_skb+0x11d/0x340 [23827.518021] netlink_unicast+0x42b/0x700 [23827.518742] netlink_sendmsg+0x743/0xc20 [23827.519467] sock_sendmsg+0xb2/0xe0 [23827.520131] ____sys_sendmsg+0x590/0x770 [23827.520851] ___sys_sendmsg+0xd8/0x160 [23827.521552] __sys_sendmsg+0xb7/0x140 [23827.522238] do_syscall_64+0x3a/0x70 [23827.522907] entry_SYSCALL_64_after_hwframe+0x44/0xae [23827.523797] [23827.524163] Freed by task 25948: [23827.524780] kasan_save_stack+0x1b/0x40 [23827.525488] kasan_set_track+0x1c/0x30 [23827.526187] kasan_set_free_info+0x20/0x30 [23827.526968] __kasan_slab_free+0xed/0x130 [23827.527709] slab_free_freelist_hook+0xcf/0x1d0 [23827.528528] kmem_cache_free_bulk+0x33a/0x6e0 [23827.529317] kfree_rcu_work+0x55f/0xb70 [23827.530024] process_one_work+0x8ac/0x14e0 [23827.530770] worker_thread+0x53b/0x1220 [23827.531480] kthread+0x328/0x3f0 [23827.532114] ret_from_fork+0x1f/0x30 [23827.532785] [23827.533147] Last potentially related work creation: [23827.534007] kasan_save_stack+0x1b/0x40 [23827.534710] kasan_record_aux_stack+0xab/0xc0 [23827.535492] kvfree_call_rcu+0x31/0x7b0 [23827.536206] mlx5e_tc_del ---truncated---

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:2365-1 advisory.

    The SUSE Linux Enterprise 15 SP2 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2021-47247: net/mlx5e: Fix use-after-free of encap entry in neigh update handler (bsc#1224865).
    - CVE-2021-47311: net: qcom/emac: fix UAF in emac_remove (bsc#1225010).
    - CVE-2021-47368: enetc: Fix illegal access when reading affinity_hint (bsc#1225161).
    - CVE-2021-47372: net: macb: fix use after free on rmmod (bsc#1225184).
    - CVE-2021-47379: blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd (bsc#1225203).
    - CVE-2021-47571: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect() (bsc#1225518).
    - CVE-2022-2938: psi: Fix uaf issue when psi trigger is destroyed while being polled (bsc#1202623).
    - CVE-2022-48760: USB: core: Fix hang in usb_kill_urb by adding memory barriers (bsc#1226712).
    - CVE-2023-52707: sched/psi: Fix use-after-free in ep_remove_wait_queue() (bsc#1225109).
    - CVE-2023-52752: smb: client: fix use-after-free bug in cifs_debug_data_proc_show() (bsc#1225487).
    - CVE-2023-52881: tcp: do not accept ACK of bytes we never sent (bsc#1225611).
    - CVE-2024-26921: Preserve kabi for sk_buff (bsc#1223138).
    - CVE-2024-26923: Fixed false-positive lockdep splat for spin_lock() in __unix_gc() (bsc#1223384).
    - CVE-2024-35789: Check fast rx for non-4addr sta VLAN changes (bsc#1224749).
    - CVE-2024-35861: Fixed potential UAF in cifs_signal_cifsd_for_reconnect() (bsc#1224766).
    - CVE-2024-35862: Fixed potential UAF in smb2_is_network_name_deleted()  (bsc#1224764).
    - CVE-2024-35864: Fixed potential UAF in smb2_is_valid_lease_break() (bsc#1224765).
    - CVE-2024-35950: drm/client: Fully protect modes with dev->mode_config.mutex (bsc#1224703).
    - CVE-2024-36894: usb: gadget: f_fs: Fix race between aio_cancel() and AIO request complete (bsc#1225749).
    - CVE-2024-36904: tcp: Use refcount_inc_not_zero() in tcp_twsk_unique() (bsc#1225732).
    - CVE-2024-36940: pinctrl: core: delete incorrect free in pinctrl_enable() (bsc#1225840).
    - CVE-2024-36964: fs/9p: only translate RWX permissions for plain 9P2000 (bsc#1225866).
    - CVE-2024-38545: RDMA/hns: Fix UAF for cq async event (bsc#1226595)
    - CVE-2024-38559: scsi: qedf: Ensure the copied buf is NUL terminated (bsc#1226758).
    - CVE-2024-38560: scsi: bfa: Ensure the copied buf is NUL terminated (bsc#1226786).


Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:2362-1 advisory.

    The SUSE Linux Enterprise 15 SP3 kernel was updated to receive various security bugfixes.


    The following security bugs were fixed:

    - CVE-2021-47247: net/mlx5e: Fix use-after-free of encap entry in neigh update handler (bsc#1224865).
    - CVE-2021-47311: net: qcom/emac: fix UAF in emac_remove (bsc#1225010).
    - CVE-2021-47368: enetc: Fix illegal access when reading affinity_hint (bsc#1225161).
    - CVE-2021-47372: net: macb: fix use after free on rmmod (bsc#1225184).
    - CVE-2021-47379: blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd (bsc#1225203).
    - CVE-2021-47571: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect() (bsc#1225518).
    - CVE-2022-48760: USB: core: Fix hang in usb_kill_urb by adding memory barriers (bsc#1226712).
    - CVE-2023-52707: sched/psi: Fix use-after-free in ep_remove_wait_queue() (bsc#1225109). polled     (bsc#1202623).
    - CVE-2023-52752: smb: client: fix use-after-free bug in cifs_debug_data_proc_show() (bsc#1225487).
    - CVE-2023-52881: tcp: do not accept ACK of bytes we never sent (bsc#1225611).
    - CVE-2024-26923: Fixed false-positive lockdep splat for spin_lock() in __unix_gc() (bsc#1223384).
    - CVE-2024-35789: Check fast rx for non-4addr sta VLAN changes (bsc#1224749).
    - CVE-2024-35861: Fixed potential UAF in cifs_signal_cifsd_for_reconnect() (bsc#1224766).
    - CVE-2024-35862: Fixed potential UAF in smb2_is_network_name_deleted() (bsc#1224764).
    - CVE-2024-35864: Fixed potential UAF in smb2_is_valid_lease_break() (bsc#1224765).
    - CVE-2024-35950: drm/client: Fully protect modes with dev->mode_config.mutex (bsc#1224703).
    - CVE-2024-36894: usb: gadget: f_fs: Fix race between aio_cancel() and AIO request complete (bsc#1225749).
    - CVE-2024-36904: tcp: Use refcount_inc_not_zero() in tcp_twsk_unique() (bsc#1225732).
    - CVE-2024-36940: pinctrl: core: delete incorrect free in pinctrl_enable() (bsc#1225840).
    - CVE-2024-36964: fs/9p: only translate RWX permissions for plain 9P2000 (bsc#1225866).
    - CVE-2024-38545: RDMA/hns: Fix UAF for cq async event (bsc#1226595)
    - CVE-2024-38559: scsi: qedf: Ensure the copied buf is NUL terminated (bsc#1226758).
    - CVE-2024-38560: scsi: bfa: Ensure the copied buf is NUL terminated (bsc#1226786).


Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
209785	EulerOS Virtualization 2.12.0 : kernel (EulerOS-SA-2024-2781)	Nessus	Huawei Local Security Checks	high
209777	EulerOS Virtualization 2.12.1 : kernel (EulerOS-SA-2024-2763)	Nessus	Huawei Local Security Checks	high
208351	EulerOS 2.0 SP12 : kernel (EulerOS-SA-2024-2519)	Nessus	Huawei Local Security Checks	high
208330	EulerOS 2.0 SP12 : kernel (EulerOS-SA-2024-2544)	Nessus	Huawei Local Security Checks	high
202104	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:2365-1)	Nessus	SuSE Local Security Checks	high
202093	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:2362-1)	Nessus	SuSE Local Security Checks	high

Detections

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CVE-2021-47247

high

Tenable Plugins

high

high

high

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high

high