Linux Kernel Security Vulnerabilities

CVE-2021-47022

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7615: fix memleak when mt7615_unregister_device() mt7615_tx_token_put() should get call before mt76_free_pending_txwi().

CVE-2021-47023

In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix port event handling on init For some reason there might be a crash during ports creation if portevents are handling at the same time because fw may send initialport event with down state. The crash point...

CVE-2021-47024

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: free queued packets when closing socket As reported by syzbot [1], there is a memory leak while closing thesocket. We partially solved this issue with commit ac03046ece2b("vsock/virtio: free packets during the socket ...

CVE-2021-47025

In the Linux kernel, the following vulnerability has been resolved: iommu/mediatek: Always enable the clk on resume In mtk_iommu_runtime_resume always enable the clk, evenif m4u_dom is null. Otherwise the 'suspend' cb mightdisable the clk which is already disabled causing the warning: [ 1.586104] i...

CVE-2021-47026

In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs-clt: destroy sysfs after removing session from active list A session can be removed dynamically by sysfs interface "remove_path" thateventually calls rtrs_clt_remove_path_from_sysfs function. The currentrtrs_clt_remove_pa...

CVE-2021-47027

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7921: fix kernel crash when the firmware fails to download Fix kernel crash when the firmware is missing or fails to download. [ 9.444758] kernel BUG at drivers/pci/msi.c:375![ 9.449363] Internal error: Oops - BUG: 0 [#1] P...

CVE-2021-47028

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7915: fix txrate reporting Properly check rate_info to fix unexpected reporting. [ 1215.161863] Call trace:[ 1215.164307] cfg80211_calculate_bitrate+0x124/0x200 [cfg80211][ 1215.170139] ieee80211s_update_metric+0x80/0xc0 [m...

CVE-2021-47029

In the Linux kernel, the following vulnerability has been resolved: mt76: connac: fix kernel warning adding monitor interface Fix the following kernel warning adding a monitor interface inmt76_connac_mcu_uni_add_dev routine. [ 507.984882] ------------[ cut here ]------------[ 507.989515] WARNING: C...

CVE-2021-47030

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7615: fix memory leak in mt7615_coredump_work Similar to the issue fixed in mt7921_coredump_work, fix a possible memoryleak in mt7615_coredump_work routine.

CVE-2021-47031

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7921: fix memory leak in mt7921_coredump_work Fix possible memory leak in mt7921_coredump_work.

CVE-2021-47032

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7915: fix tx skb dma unmap The first pointer in the txp needs to be unmapped as well, otherwise it willleak DMA mapping entries

CVE-2021-47033

In the Linux kernel, the following vulnerability has been resolved: mt76: mt7615: fix tx skb dma unmap The first pointer in the txp needs to be unmapped as well, otherwise it willleak DMA mapping entries

CVE-2021-47034

In the Linux kernel, the following vulnerability has been resolved: powerpc/64s: Fix pte update for kernel memory on radix When adding a PTE a ptesync is needed to order the update of the PTEwith subsequent accesses otherwise a spurious fault may be raised. radix__set_pte_at() does not do this for ...

CVE-2021-47035

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Remove WO permissions on second-level paging entries When the first level page table is used for IOVA translation, it onlysupports Read-Only and Read-Write permissions. The Write-Only permissionis not supported as the P...

CVE-2021-47036

In the Linux kernel, the following vulnerability has been resolved: udp: skip L4 aggregation for UDP tunnel packets If NETIF_F_GRO_FRAGLIST or NETIF_F_GRO_UDP_FWD are enabled, and thereare UDP tunnels available in the system, udp_gro_receive() could end-updoing L4 aggregation (either SKB_GSO_UDP_L4...

CVE-2021-47037

In the Linux kernel, the following vulnerability has been resolved: ASoC: q6afe-clocks: fix reprobing of the driver Q6afe-clocks driver can get reprobed. For example if the APR servicesare restarted after the firmware crash. However currently Q6afe-clocksdriver will oops because hw.init will get cl...

CVE-2021-47038

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: avoid deadlock between hci_dev->lock and socket lock Commit eab2404ba798 ("Bluetooth: Add BT_PHY socket option") added adependency between socket lock and hci_dev->lock that could lead todeadlock. It turns out that...

CVE-2021-47039

In the Linux kernel, the following vulnerability has been resolved: ataflop: potential out of bounds in do_format() The function uses "type" as an array index: q = unit[drive].disk[type]->queue; Unfortunately the bounds check on "type" isn't done until later in thefunction. Fix this by moving th...

CVE-2021-47040

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix overflows checks in provide buffers Colin reported before possible overflow and sign extension problems inio_provide_buffers_prep(). As Linus pointed out previous attempt did nothinguseful, see d81269fecb8ce ("io_urin...

CVE-2021-47041

In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: fix incorrect locking in state_change sk callback We are not changing anything in the TCP connection state sowe should not take a write_lock but rather a read lock. This caused a deadlock when running nvmet-tcp and nvme-...

CVE-2021-47042

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Free local data after use Fixes the following memory leak in dc_link_construct(): unreferenced object 0xffffa03e81471400 (size 1024):comm "amd_module_load", pid 2486, jiffies 4294946026 (age 10.544s)hex dump (first...

CVE-2021-47043

In the Linux kernel, the following vulnerability has been resolved: media: venus: core: Fix some resource leaks in the error path of 'venus_probe()' If an error occurs after a successful 'of_icc_get()' call, it must beundone. Use 'devm_of_icc_get()' instead of 'of_icc_get()' to avoid the leak.Updat...

CVE-2021-47044

In the Linux kernel, the following vulnerability has been resolved: sched/fair: Fix shift-out-of-bounds in load_balance() Syzbot reported a handful of occurrences where an sd->nr_balance_failed cangrow to much higher values than one would expect. A successful load_balance() resets it to 0; a fai...

CVE-2021-47045

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix null pointer dereference in lpfc_prep_els_iocb() It is possible to call lpfc_issue_els_plogi() passing a did for which nomatching ndlp is found. A call is then made to lpfc_prep_els_iocb() with anull pointer to a lp...

CVE-2021-47046

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix off by one in hdmi_14_process_transaction() The hdcp_i2c_offsets[] array did not have an entry forHDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by oneread overflow. I added an entry and copied t...

CVE-2021-47047

In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynqmp-gqspi: return -ENOMEM if dma_map_single fails The spi controller supports 44-bit address space on AXI in DMA mode,so set dma_addr_t width to 44-bit to avoid using a swiotlb mapping.In addition, if dma_map_single fai...

CVE-2021-47048

In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op When handling op->addr, it is using the buffer "tmpbuf" which has beenfreed. This will trigger a use-after-free KASAN warning. Let's usetemporary variables to stor...

CVE-2021-47049

In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Use after free in __vmbus_open() The "open_info" variable is added to the &vmbus_connection.chn_msg_list,but the error handling frees "open_info" without removing it from thelist. This will result in a use after...

CVE-2021-47050

In the Linux kernel, the following vulnerability has been resolved: memory: renesas-rpc-if: fix possible NULL pointer dereference of resource The platform_get_resource_byname() can return NULL which would beimmediately dereferenced by resource_size(). Instead dereference itafter validating the reso...

CVE-2021-47051

In the Linux kernel, the following vulnerability has been resolved: spi: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware() pm_runtime_get_sync will increment pm usage counter even it failed.Forgetting to putting operation will result in reference leak here.Fix it by replacing it wit...

CVE-2021-47052

In the Linux kernel, the following vulnerability has been resolved: crypto: sa2ul - Fix memory leak of rxd There are two error return paths that are not freeing rxd and causingmemory leaks. Fix these. Addresses-Coverity: ("Resource leak")

CVE-2021-47053

In the Linux kernel, the following vulnerability has been resolved: crypto: sun8i-ss - Fix memory leak of pad It appears there are several failure return paths that don't seemto be free'ing pad. Fix these. Addresses-Coverity: ("Resource leak")

CVE-2021-47054

In the Linux kernel, the following vulnerability has been resolved: bus: qcom: Put child node before return Put child node before return to fix potential reference count leak.Generally, the reference count of child is incremented and decrementedautomatically in the macro for_each_available_child_of...

CVE-2021-47055

In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus requirewrite permission. Depending on the hardware MEMLOCK might even bewrite-once, e.g. for SPI-NOR flashes...

CVE-2021-47056

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - ADF_STATUS_PF_RUNNING should be set after adf_dev_init ADF_STATUS_PF_RUNNING is (only) used and checked by adf_vf2pf_shutdown()before calling adf_iov_putmsg()->mutex_lock(vf2pf_lock), however thevf2pf_lock is initi...

CVE-2021-47057

In the Linux kernel, the following vulnerability has been resolved: crypto: sun8i-ss - Fix memory leak of object d when dma_iv fails to map In the case where the dma_iv mapping fails, the return error path leaksthe memory allocated to object d. Fix this by adding a new error returnlabel and jumping...

CVE-2021-47058

In the Linux kernel, the following vulnerability has been resolved: regmap: set debugfs_name to NULL after it is freed There is a upstream commit cffa4b2122f5("regmap:debugfs:Fix a memory leak when calling regmap_attach_dev") thatadds a if condition when create name for debugfs_name.With below func...

CVE-2021-47059

In the Linux kernel, the following vulnerability has been resolved: crypto: sun8i-ss - fix result memory leak on error path This patch fixes a memory leak on an error path.

CVE-2021-47060

In the Linux kernel, the following vulnerability has been resolved: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev()fails to allocate memory for the new instance of the bus. If it can'tinstantiate a new bus, unr...

CVE-2021-47061

In the Linux kernel, the following vulnerability has been resolved: KVM: Destroy I/O bus devices on unregister failure after sync'ing SRCU If allocating a new instance of an I/O bus fails when unregistering adevice, wait to destroy the device until after all readers are guaranteedto see the new nul...

CVE-2021-47062

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs Use the kvm_for_each_vcpu() helper to iterate over vCPUs when encryptingVMSAs for SEV, which effectively switches to use online_vcpus instead ofcreated_vcpus. Thi...

CVE-2021-47063

In the Linux kernel, the following vulnerability has been resolved: drm: bridge/panel: Cleanup connector on bridge detach If we don't call drm_connector_cleanup() manually inpanel_bridge_detach(), the connector will be cleaned up with the otherDRM objects in the call to drm_mode_config_cleanup(). H...

CVE-2021-47064

In the Linux kernel, the following vulnerability has been resolved: mt76: fix potential DMA mapping leak With buf uninitialized in mt76_dma_tx_queue_skb_raw, its field skip_unmapcould potentially inherit a non-zero value from stack garbage.If this happens, it will cause DMA mappings for MCU command...

CVE-2021-47065

In the Linux kernel, the following vulnerability has been resolved: rtw88: Fix array overrun in rtw_get_tx_power_params() Using a kernel with the Undefined Behaviour Sanity Checker (UBSAN) enabled, thefollowing array overrun is logged: ===============================================================...

CVE-2021-47066

In the Linux kernel, the following vulnerability has been resolved: async_xor: increase src_offs when dropping destination page Now we support sharing one page if PAGE_SIZE is not equal stripe size. Tosupport this, it needs to support calculating xor value with differentoffsets for each r5dev. One ...

CVE-2021-47067

In the Linux kernel, the following vulnerability has been resolved: soc/tegra: regulators: Fix locking up when voltage-spread is out of range Fix voltage coupler lockup which happens when voltage-spread is outof range due to a bug in the code. The max-spread requirement shall beaccounted when CPU r...

CVE-2021-47068

In the Linux kernel, the following vulnerability has been resolved: net/nfc: fix use-after-free llcp_sock_bind/connect Commits 8a4cd82d ("nfc: fix refcount leak in llcp_sock_connect()")and c33b1cc62 ("nfc: fix refcount leak in llcp_sock_bind()")fixed a refcount leak bug in bind/connect but introduc...

CVE-2021-47069

In the Linux kernel, the following vulnerability has been resolved: ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry do_mq_timedreceive calls wq_sleep with a stack local address. Thesender (do_mq_timedsend) uses this address to later call pipelined_send. This leads to a very...

CVE-2021-47070

In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Fix another memory leak in error handling paths Memory allocated by 'vmbus_alloc_ring()' at the beginning of the probefunction is never freed in the error handling path. Add the missing 'vmbus_free_ring()' call. Not...

CVE-2021-47071

In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Fix a memory leak in error handling paths If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not beupdated and 'hv_uio_cleanup()' in the error handling path will not beable to free the corresponding buff...