Linux Kernel Security Vulnerabilities

CVE-2021-47179

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() Commit de144ff4234f changes _pnfs_return_layout() to callpnfs_mark_matching_lsegs_return() passing NULL as the structpnfs_layout_range argument. Unfortunate...

CVE-2021-47180

In the Linux kernel, the following vulnerability has been resolved: NFC: nci: fix memory leak in nci_allocate_device nfcmrvl_disconnect fails to free the hci_dev field in struct nci_dev.Fix this by freeing hci_dev in nci_free_device. BUG: memory leakunreferenced object 0xffff888111ea6800 (size 1024...

CVE-2021-47181

In the Linux kernel, the following vulnerability has been resolved: usb: musb: tusb6010: check return value after calling platform_get_resource() It will cause null-ptr-deref if platform_get_resource() returns NULL,we need check the return value.

CVE-2021-47182

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix scsi_mode_sense() buffer length handling Several problems exist with scsi_mode_sense() buffer length handling: The allocation length field of the MODE SENSE(10) command is 16-bits,occupying bytes 7 and 8 of the CDB....

CVE-2021-47183

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix link down processing to address NULL pointer dereference If an FC link down transition while PLOGIs are outstanding to fabric wellknown addresses, outstanding ABTS requests may result in a NULL pointerdereference. D...

CVE-2021-47184

In the Linux kernel, the following vulnerability has been resolved: i40e: Fix NULL ptr dereference on VSI filter sync Remove the reason of null pointer dereference in sync VSI filters.Added new I40E_VSI_RELEASING flag to signalize deleting and releasingof VSI resources to sync this thread with sync...

CVE-2021-47185

In the Linux kernel, the following vulnerability has been resolved: tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc When running ltp testcase(ltp/testcases/kernel/pty/pty04.c) with arm64, there is a soft lockup,which look like this one: Workqueue: events_unbound flush_to_ldiscCall trace...

CVE-2021-47186

In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup can return a null pointer so need to check for it, otherwisethe null key will be dereferenced later in tipc_crypto_key_xmit ascan be seen in the trace [1]. [1] https://syzkaller.ap...

CVE-2021-47187

In the Linux kernel, the following vulnerability has been resolved: arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency The entry/exit latency and minimum residency in state for the idlestates of MSM8998 were ..bad: first of all, for all of them thetimings were written for CPU sl...

CVE-2021-47188

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Improve SCSI abort handling The following has been observed on a test setup: WARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65cCall trace:ufshcd_queuecommand+0x468/0x65cscsi_...

CVE-2021-47189

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix memory ordering between normal and ordered work functions Ordered work functions aren't guaranteed to be handled by the same threadwhich executed the normal work functions. The only way execution betweennormal/ordered fu...

CVE-2021-47190

In the Linux kernel, the following vulnerability has been resolved: perf bpf: Avoid memory leak from perf_env__insert_btf() perf_env__insert_btf() doesn't insert if a duplicate BTF id isencountered and this causes a memory leak. Modify the function to returna success/error value and then free the m...

CVE-2021-47191

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix out-of-bound read in resp_readcap16() The following warning was observed running syzkaller: [ 3813.830724] sg_write: data in/out 65466/242 bytes for SCSI command 0x9e-- guessing data in;[ 3813.830724] program ...

CVE-2021-47192

In the Linux kernel, the following vulnerability has been resolved: scsi: core: sysfs: Fix hang when device state is set via sysfs This fixes a regression added with: commit f0f82e2476f6 ("scsi: core: Fix capacity set to zero afterofflinining device") The problem is that after iSCSI recovery, iscsi...

CVE-2021-47193

In the Linux kernel, the following vulnerability has been resolved: scsi: pm80xx: Fix memory leak during rmmod Driver failed to release all memory allocated. This would lead to memoryleak during driver removal. Properly free memory when the module is removed.

CVE-2021-47194

In the Linux kernel, the following vulnerability has been resolved: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type If the userspace tools switch from NL80211_IFTYPE_P2P_GO toNL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), itdoes not call the cleanup cfg80211_stop_ap(), t...

CVE-2021-47195

In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free of the add_lock mutex Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers onSPI buses") introduced a per-controller mutex. But mutex_unlock() ofsaid lock is called after the controller is alr...

CVE-2021-47196

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Set send and receive CQ before forwarding to the driver Preset both receive and send CQ pointers prior to call to the drivers andoverwrite it later again till the mlx4 is going to be changed do notoverwrite ibqp properti...

CVE-2021-47197

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: nullify cq->dbg pointer in mlx5_debug_cq_remove() Prior to this patch in case mlx5_core_destroy_cq() failed it proceedsto rest of destroy operations. mlx5_core_destroy_cq() could be called againby user and cause addit...

CVE-2021-47198

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix use-after-free in lpfc_unreg_rpi() routine An error is detected with the following report when unloading the driver:"KASAN: use-after-free in lpfc_unreg_rpi+0x1b1b" The NLP_REG_LOGIN_SEND nlp_flag is set in lpfc_reg...

CVE-2021-47199

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: CT, Fix multiple allocations and memleak of mod acts CT clear action offload adds additional mod hdr actions to theflow's original mod actions in order to clear the registers whichhold ct_state.When such flow also includ...

CVE-2021-47200

In the Linux kernel, the following vulnerability has been resolved: drm/prime: Fix use after free in mmap with drm_gem_ttm_mmap drm_gem_ttm_mmap() drops a reference to the gem object on success. Ifthe gem object's refcount == 1 on entry to drm_gem_prime_mmap(), thatdrop will free the gem object, an...

CVE-2021-47201

In the Linux kernel, the following vulnerability has been resolved: iavf: free q_vectors before queues in iavf_disable_vf iavf_free_queues() clears adapter->num_active_queues, whichiavf_free_q_vectors() relies on, so swap the order of these two functioncalls in iavf_disable_vf(). This resolves a...

CVE-2021-47202

In the Linux kernel, the following vulnerability has been resolved: thermal: Fix NULL pointer dereferences in of_thermal_ functions of_parse_thermal_zones() parses the thermal-zones node and registers athermal_zone device for each subnode. However, if a thermal zone isconsuming a thermal sensor and...

CVE-2021-47203

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq() When parsing the txq list in lpfc_drain_txq(), the driver attempts to passthe requests to the adapter. If such an attempt fails, a local "fail_msg"string is set and a log me...

CVE-2021-47204

In the Linux kernel, the following vulnerability has been resolved: net: dpaa2-eth: fix use-after-free in dpaa2_eth_remove Access to netdev after free_netdev() will cause use-after-free bug.Move debug log before free_netdev() call to avoid it.

CVE-2021-47205

In the Linux kernel, the following vulnerability has been resolved: clk: sunxi-ng: Unregister clocks/resets when unbinding Currently, unbinding a CCU driver unmaps the device's MMIO region, whileleaving its clocks/resets and their providers registered. This can causea page fault later when some clo...

CVE-2021-47206

In the Linux kernel, the following vulnerability has been resolved: usb: host: ohci-tmio: check return value after calling platform_get_resource() It will cause null-ptr-deref if platform_get_resource() returns NULL,we need check the return value.

CVE-2021-47207

In the Linux kernel, the following vulnerability has been resolved: ALSA: gus: fix null pointer dereference on pointer block The pointer block return from snd_gf1_dma_next_block could benull, so there is a potential null pointer dereference issue.Fix this by adding a null check before dereference.

CVE-2021-47209

In the Linux kernel, the following vulnerability has been resolved: sched/fair: Prevent dead task groups from regaining cfs_rq's Kevin is reporting crashes which point to a use-after-free of a cfs_rqin update_blocked_averages(). Initial debugging revealed that we'velive cfs_rq's (on_list=1) in an a...

CVE-2021-47210

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tipd: Remove WARN_ON in tps6598x_block_read Calling tps6598x_block_read with a higher than allowed len can behandled by just returning an error. There's no need to crash systemswith panic-on-warn enabled.

CVE-2021-47211

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix null pointer dereference on pointer cs_desc The pointer cs_desc return from snd_usb_find_clock_source couldbe null, so there is a potential null pointer dereference issue.Fix this by adding a null check before ...

CVE-2021-47212

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Update error handler for UCTX and UMEM In the fast unload flow, the device state is set to internal error,which indicates that the driver started the destroy process.In this case, when a destroy command is being executed,...

CVE-2021-47214

In the Linux kernel, the following vulnerability has been resolved: hugetlb, userfaultfd: fix reservation restore on userfaultfd error Currently in the is_continue case in hugetlb_mcopy_atomic_pte(), if webail out using "goto out_release_unlock;" in the cases where idx >=size, or !huge_pte_none(...

CVE-2021-47215

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: kTLS, Fix crash in RX resync flow For the TLS RX resync flow, we maintain a list of TLS contextsthat require some attention, to communicate their resync informationto the HW.Here we fix list corruptions, by protecting th...

CVE-2021-47216

In the Linux kernel, the following vulnerability has been resolved: scsi: advansys: Fix kernel pointer leak Pointers should be printed with %p or %px rather than cast to 'unsignedlong' and printed with %lx. Change %lx to %p to print the hashed pointer.

CVE-2021-47217

In the Linux kernel, the following vulnerability has been resolved: x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails Check for a valid hv_vp_index array prior to derefencing hv_vp_index whensetting Hyper-V's TSC change callback. If Hyper-V setup failed inhyperv_init(), the...

CVE-2021-47218

In the Linux kernel, the following vulnerability has been resolved: selinux: fix NULL-pointer dereference when hashtab allocation fails When the hash table slot array allocation fails in hashtab_init(),h->size is left initialized with a non-zero value, but the h->htablepointer is NULL. This m...

CVE-2021-47219

In the Linux kernel, the following vulnerability has been resolved: scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs() The following issue was observed running syzkaller: BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline]BUG: KASAN: slab-out-of-bounds in sg_co...

CVE-2021-47220

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: core: fix kernel panic when do reboot When do system reboot, it calls dwc3_shutdown and the whole debugfsfor dwc3 has removed first, when the gadget tries to do deinit, andremove debugfs for its endpoints, it meets NULL ...

CVE-2021-47221

In the Linux kernel, the following vulnerability has been resolved: mm/slub: actually fix freelist pointer vs redzoning It turns out that SLUB redzoning ("slub_debug=Z") checks froms->object_size rather than from s->inuse (which is normally bumped tomake room for the freelist pointer), so a c...

CVE-2021-47222

In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst refcnt when egressing The egress tunnel code uses dst_clone() and directly sets the resultwhich is wrong because the entry might have 0 refcnt or be already deleted,causing number of problems. It al...

CVE-2021-47223

In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst null pointer dereference This patch fixes a tunnel_dst null pointer dereference due to locklessaccess in the tunnel egress path. When deleting a vlan tunnel thetunnel_dst pointer is set to NULL with...

CVE-2021-47224

In the Linux kernel, the following vulnerability has been resolved: net: ll_temac: Make sure to free skb when it is completely used With the skb pointer piggy-backed on the TX BD, we have a simple andefficient way to free the skb buffer when the frame has been transmitted.But in order to avoid free...

CVE-2021-47225

In the Linux kernel, the following vulnerability has been resolved: mac80211: fix deadlock in AP/VLAN handling Syzbot reports that when you have AP_VLAN interfaces that are upand close the AP interface they belong to, we get a deadlock. Nosurprise - since we dev_close() them with the wiphy mutex he...

CVE-2021-47226

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Invalidate FPU state after a failed XRSTOR from a user buffer Both Intel and AMD consider it to be architecturally valid for XRSTOR tofail with #PF but nonetheless change the register state. The actualconditions under whic...

CVE-2021-47227

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Prevent state corruption in __fpu__restore_sig() The non-compacted slowpath uses __copy_from_user() and copies the entireuser buffer into the kernel buffer, verbatim. This means that the kernelbuffer may now contain entire...

CVE-2021-47228

In the Linux kernel, the following vulnerability has been resolved: x86/ioremap: Map EFI-reserved memory as encrypted for SEV Some drivers require memory that is marked as EFI boot servicesdata. In order for this memory to not be re-used by the kernelafter ExitBootServices(), efi_mem_reserve() is u...

CVE-2021-47229

In the Linux kernel, the following vulnerability has been resolved: PCI: aardvark: Fix kernel panic during PIO transfer Trying to start a new PIO transfer by writing value 0 in PIO_START registerwhen previous transfer has not yet completed (which is indicated by value 1in PIO_START) causes an Exter...

CVE-2021-47230

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Immediately reset the MMU context when the SMM flag is cleared Immediately reset the MMU context when the vCPU's SMM flag is cleared sothat the SMM flag in the MMU role is always synchronized with the vCPU'sflag. If RSM f...