Linux Kernel Security Vulnerabilities

CVE-2021-47537

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix a memleak bug in rvu_mbox_init() In rvu_mbox_init(), mbox_regions is not freed or passed outunder the switch-default region, which could lead to a memory leak. Fix this bug by changing 'return err' to 'goto free_r...

CVE-2021-47538

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_local leak in rxrpc_lookup_peer() Need to call rxrpc_put_local() for peer candidate before kfree() as itholds a ref to rxrpc_local. [DH: v2: Changed to abstract the peer freeing code out into a function]

CVE-2021-47539

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() Need to call rxrpc_put_peer() for bundle candidate before kfree() as itholds a ref to rxrpc_peer. [DH: v2: Changed to abstract out the bundle freeing code into a function]

CVE-2021-47540

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode Fix the following NULL pointer dereference in mt7915_get_phy_moderoutine adding an ibss interface to the mt7915 driver. [ 101.137097] wlan0: Trigger new scan to find...

CVE-2021-47541

In the Linux kernel, the following vulnerability has been resolved: net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources() In mlx4_en_try_alloc_resources(), mlx4_en_copy_priv() is called andtmp->tx_cq will be freed on the error path of mlx4_en_copy_priv().After that mlx4_en_allo...

CVE-2021-47542

In the Linux kernel, the following vulnerability has been resolved: net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings() In qlcnic_83xx_add_rings(), the indirect function ofahw->hw_ops->alloc_mbx_args will be called to allocate memory forcmd.req.arg, and there is a d...

CVE-2021-47544

In the Linux kernel, the following vulnerability has been resolved: tcp: fix page frag corruption on page fault Steffen reported a TCP stream corruption for HTTP requestsserved by the apache web-server using a cifs mount-pointand memory mapping the relevant file. The root cause is quite similar to ...

CVE-2021-47546

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix memory leak in fib6_rule_suppress The kernel leaks memory when a fib rule is present in IPv6 nftablesfirewall rules and a suppress_prefix rule is present in the IPv6 routingrules (used by certain tools such as wg-quick). ...

CVE-2021-47547

In the Linux kernel, the following vulnerability has been resolved: net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound In line 5001, if all id in the array 'lp->phy[8]' is not 0, when the'for' end, the 'k' is 8. At this time, the array 'lp->phy[8]' may be ou...

CVE-2021-47548

In the Linux kernel, the following vulnerability has been resolved: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() The if statement:if (port >= DSAF_GE_NUM)return; limits the value of port less than DSAF_GE_NUM (i.e., 8).However, if the value...

CVE-2021-47549

In the Linux kernel, the following vulnerability has been resolved: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the rmmod sata_fsl.ko command is executed in the PPC64 GNU/Linux,a bug is reported: BUG: Unable to handle kernel data access on read at 0x80000800805b502cOops: Kernel...

CVE-2021-47550

In the Linux kernel, the following vulnerability has been resolved: drm/amd/amdgpu: fix potential memleak In function amdgpu_get_xgmi_hive, when kobject_init_and_add failedThere is a potential memleak if not call kobject_put.

CVE-2021-47551

In the Linux kernel, the following vulnerability has been resolved: drm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again In SRIOV configuration, the reset may failed to bring asic back to normal but stop cpschalready been called, the start_cpsch will not be called since there...

CVE-2021-47552

In the Linux kernel, the following vulnerability has been resolved: blk-mq: cancel blk-mq dispatch work in both blk_cleanup_queue and disk_release() For avoiding to slow down queue destroy, we don't callblk_mq_quiesce_queue() in blk_cleanup_queue(), instead of delaying tocancel dispatch work in blk...

CVE-2021-47553

In the Linux kernel, the following vulnerability has been resolved: sched/scs: Reset task stack state in bringup_cpu() To hot unplug a CPU, the idle task on that CPU calls a few layers of Ccode before finally leaving the kernel. When KASAN is in use, poisonedshadow is left around for each of the ac...

CVE-2021-47554

In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: avoid putting an uninitialized iova_domain The system will crash if we put an uninitialized iova_domain, thiscould happen when an error occurs before initializing the iova_domainin vdpasim_create(). BUG: kernel NULL point...

CVE-2021-47555

In the Linux kernel, the following vulnerability has been resolved: net: vlan: fix underflow for the real_dev refcnt Inject error before dev_hold(real_dev) in register_vlan_dev(),and execute the following testcase: ip link add dev dummy1 type dummyip link add name dummy1.100 link dummy1 type vlan i...

CVE-2021-47556

In the Linux kernel, the following vulnerability has been resolved: ethtool: ioctl: fix potential NULL deref in ethtool_set_coalesce() ethtool_set_coalesce() now uses both the .get_coalesce() and.set_coalesce() callbacks. But the check for their availability isbuggy, so changing the coalesce settin...

CVE-2021-47557

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_ets: don't peek at classes beyond 'nbands' when the number of DRR classes decreases, the round-robin active list cancontain elements that have already been freed in ets_qdisc_change(). As aconsequence, it's possible ...

CVE-2021-47558

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Disable Tx queues when reconfiguring the interface The Tx queues were not disabled in situations where the driver needed tostop the interface to apply a new configuration. This could result in akernel panic when doing ...

CVE-2021-47559

In the Linux kernel, the following vulnerability has been resolved: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk() Coverity reports a possible NULL dereferencing problem: in smc_vlan_by_tcpsk():6. returned_null: netdev_lower_get_next returns NULL (checked 29 out of 30 times).7. var_...

CVE-2021-47560

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events generated by the device's firmware,the driver protects itself from events reported for non-existent localports, but not the CPU port (local por...

CVE-2021-47561

In the Linux kernel, the following vulnerability has been resolved: i2c: virtio: disable timeout handling If a timeout is hit, it can result is incorrect data on the I2C busand/or memory corruptions in the guest since the device can still beoperating on the buffers it was given while the guest has ...

CVE-2021-47562

In the Linux kernel, the following vulnerability has been resolved: ice: fix vsi->txq_map sizing The approach of having XDP queue per CPU regardless of user's settingexposed a hidden bug that could occur in case when Rx queue count differfrom Tx queue count. Currently vsi->txq_map's size is e...

CVE-2021-47563

In the Linux kernel, the following vulnerability has been resolved: ice: avoid bpf_prog refcount underflow Ice driver has the routines for managing XDP resources that are sharedbetween ndo_bpf op and VSI rebuild flow. The latter takes place forexample when user changes queue count on an interface v...

CVE-2021-47564

In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix double free issue on err path fix error path handling in prestera_bridge_port_join() thatcases prestera driver to crash (see below). Trace:Internal error: Oops: 96000044 [#1] SMPModules linked in: preste...

CVE-2021-47565

In the Linux kernel, the following vulnerability has been resolved: scsi: mpt3sas: Fix kernel panic during drive powercycle test While looping over shost's sdev list it is possible that oneof the drives is getting removed and its sas_target object isfreed but its sdev object remains intact. Consequ...

CVE-2021-47566

In the Linux kernel, the following vulnerability has been resolved: proc/vmcore: fix clearing user buffer by properly using clear_user() To clear a user buffer we cannot simply use memset, we have to useclear_user(). With a virtio-mem device that registers a vmcore_cb andhas some logically unplugge...

CVE-2021-47567

In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do notactivate MMU before reading task struct") a vmap stack overflowresults in a hard lockup. This is because emergency...

CVE-2021-47568

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix memleak in get_file_stream_info() Fix memleak in get_file_stream_info()

CVE-2021-47569

In the Linux kernel, the following vulnerability has been resolved: io_uring: fail cancellation for EXITING tasks WARNING: CPU: 1 PID: 20 at fs/io_uring.c:6269 io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.16.0-rc1-syzkaller #0Workqueue: events ...

CVE-2021-47570

In the Linux kernel, the following vulnerability has been resolved: staging: r8188eu: fix a memory leak in rtw_wx_read32() Free "ptmp" before returning -EINVAL.

CVE-2021-47571

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect() The free_rtllib() function frees the "dev" pointer so there is useafter free on the next line. Re-arrange things to avoid that.

CVE-2021-47572

In the Linux kernel, the following vulnerability has been resolved: net: nexthop: fix null pointer dereference when IPv6 is not enabled When we try to add an IPv6 nexthop and IPv6 is not enabled(!CONFIG_IPV6) we'll hit a NULL pointer dereference[1] in the error pathof nh_create_ipv6() due to callin...

CVE-2021-47576

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Sanity check block descriptor length in resp_mode_select() In resp_mode_select() sanity check the block descriptor len to avoid UAF. BUG: KASAN: use-after-free in resp_mode_select+0xa4c/0xb40 drivers/scsi/scsi_deb...

CVE-2021-47577

In the Linux kernel, the following vulnerability has been resolved: io-wq: check for wq exit after adding new worker task_work We check IO_WQ_BIT_EXIT before attempting to create a new worker, andwq exit cancels pending work if we have any. But it's possible to havea race between the two, where cre...

CVE-2021-47578

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Don't call kcalloc() if size arg is zero If the size arg to kcalloc() is zero, it returns ZERO_SIZE_PTR. Because ofthat, for a following NULL pointer check to work on the returned pointer,kcalloc() must not be cal...

CVE-2021-47579

In the Linux kernel, the following vulnerability has been resolved: ovl: fix warning in ovl_create_real() Syzbot triggered the following warning in ovl_workdir_create() ->ovl_create_real(): if (!err && WARN_ON(!newdentry->d_inode)) { The reason is that the cgroup2 filesystem returns from mkdi...

CVE-2021-47580

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix type in min_t to avoid stack OOB Change min_t() to use type "u32" instead of type "int" to avoid stack outof bounds. With min_t() type "int" the values get sign extended and thelarger value gets used causing s...

CVE-2021-47582

In the Linux kernel, the following vulnerability has been resolved: USB: core: Make do_proc_control() and do_proc_bulk() killable The USBDEVFS_CONTROL and USBDEVFS_BULK ioctls invokeusb_start_wait_urb(), which contains an uninterruptible wait with auser-specified timeout value. If timeout value is ...

CVE-2021-47583

In the Linux kernel, the following vulnerability has been resolved: media: mxl111sf: change mutex_init() location Syzbot reported, that mxl111sf_ctrl_msg() uses uninitializedmutex. The problem was in wrong mutex_init() location. Previous mutex_init(&state->msg_lock) call was in ->init() funct...

CVE-2021-47584

In the Linux kernel, the following vulnerability has been resolved: iocost: Fix divide-by-zero on donation from low hweight cgroup The donation calculation logic assumes that the donor has non-zeroafter-donation hweight, so the lowest active hweight a donating cgroup canhave is 2 so that it can don...

CVE-2021-47585

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix memory leak in __add_inode_ref() Line 1169 (#3) allocates a memory chunk for victim_name by kmalloc(),but when the function returns in line 1184 (#4) victim_name allocatedby line 1169 (#3) is not freed, which will lead t...

CVE-2021-47586

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: dwmac-rk: fix oob read in rk_gmac_setup KASAN reports an out-of-bounds read in rk_gmac_setup on the line: while (ops->regs[i]) { This happens for most platforms since the regs flexible array member isempty, so the m...

CVE-2021-47587

In the Linux kernel, the following vulnerability has been resolved: net: systemport: Add global locking for descriptor lifecycle The descriptor list is a shared resource across all of the transmit queues, andthe locking mechanism used today only protects concurrency across a giventransmit queue bet...

CVE-2021-47588

In the Linux kernel, the following vulnerability has been resolved: sit: do not call ipip6_dev_free() from sit_init_net() ipip6_dev_free is sit dev->priv_destructor, already calledby register_netdevice() if something goes wrong. Alternative would be to make ipip6_dev_free() robust againstmultipl...

CVE-2021-47589

In the Linux kernel, the following vulnerability has been resolved: igbvf: fix double free in igbvf_probe In igbvf_probe, if register_netdev() fails, the program will go tolabel err_hw_init, and then to label err_ioremap. In free_netdev() whichis just below label err_ioremap, there is list_for_each...

CVE-2021-47590

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix deadlock in __mptcp_push_pending() __mptcp_push_pending() may call mptcp_flush_join_list() with subflowsocket lock held. If such call hits mptcp_sockopt_sync_all() thensubsequently __mptcp_sockopt_sync() could try to loc...

CVE-2021-47591

In the Linux kernel, the following vulnerability has been resolved: mptcp: remove tcp ulp setsockopt support TCP_ULP setsockopt cannot be used for mptcp because its alreadyused internally to plumb subflow (tcp) sockets to the mptcp layer. syzbot managed to trigger a crash for mptcp connections that...

CVE-2021-47592

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix tc flower deletion for VLAN priority Rx steering To replicate the issue:- Add 1 flower filter for VLAN Priority based frame steering:-$ IFDEVNAME=eth0$ tc qdisc add dev $IFDEVNAME ingress$ tc qdisc add dev $IFDEVNA...