Linux Kernel Security Vulnerabilities

CVE-2021-47435

In the Linux kernel, the following vulnerability has been resolved: dm: fix mempool NULL pointer race when completing IO dm_io_dec_pending() calls end_io_acct() first and will then dec mdin-flight pending count. But if a task is swapping DM table at sametime this can result in a crash due to mempoo...

CVE-2021-47436

In the Linux kernel, the following vulnerability has been resolved: usb: musb: dsps: Fix the probe error path Commit 7c75bde329d7 ("usb: musb: musb_dsps: request_irq() afterinitializing musb") has inverted the calls todsps_setup_optional_vbus_irq() and dsps_create_musb_pdev() withoutupdating correc...

CVE-2021-47437

In the Linux kernel, the following vulnerability has been resolved: iio: adis16475: fix deadlock on frequency set With commit 39c024b51b560("iio: adis16475: improve sync scale mode handling"), two deadlocks wereintroduced: The call to 'adis_write_reg_16()' was not changed to it's unlockedversion. T...

CVE-2021-47438

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path Prior to this patch in case mlx5_core_destroy_cq() failed it returnswithout completing all destroy operations and that leads to memory leak.Instead, complete the destr...

CVE-2021-47439

In the Linux kernel, the following vulnerability has been resolved: net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work When the ksz module is installed and removed using rmmod, kernel crasheswith null pointer dereferrence error. During rmmod, ksz_switch_removefunction tries t...

CVE-2021-47440

In the Linux kernel, the following vulnerability has been resolved: net: encx24j600: check error in devm_regmap_init_encx24j600 devm_regmap_init may return error which caused by like out of memory,this will results in null pointer dereference later when readingor writing register: general protectio...

CVE-2021-47441

In the Linux kernel, the following vulnerability has been resolved: mlxsw: thermal: Fix out-of-bounds memory accesses Currently, mlxsw allows cooling states to be set above the maximumcooling state supported by the driver: cat /sys/class/thermal/thermal_zone2/cdev0/type mlxsw_fan cat /sys/class/the...

CVE-2021-47442

In the Linux kernel, the following vulnerability has been resolved: NFC: digital: fix possible memory leak in digital_in_send_sdd_req() 'skb' is allocated in digital_in_send_sdd_req(), but not free whendigital_in_send_cmd() failed, which will cause memory leak. Fix itby freeing 'skb' if digital_in_...

CVE-2021-47443

In the Linux kernel, the following vulnerability has been resolved: NFC: digital: fix possible memory leak in digital_tg_listen_mdaa() 'params' is allocated in digital_tg_listen_mdaa(), but not free whendigital_send_cmd() failed, which will cause memory leak. Fix it byfreeing 'params' if digital_se...

CVE-2021-47444

In the Linux kernel, the following vulnerability has been resolved: drm/edid: In connector_bad_edid() cap num_of_ext by num_blocks read In commit e11f5bd8228f ("drm: Add support for DP 1.4 Compliance edidcorruption test") the function connector_bad_edid() started assumingthat the memory for the EDI...

CVE-2021-47445

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Fix null pointer dereference on pointer edp The initialization of pointer dev dereferences pointer edp beforeedp is null checked, so there is a potential null pointer deferenceissue. Fix this by only dereferencing edp afte...

CVE-2021-47446

In the Linux kernel, the following vulnerability has been resolved: drm/msm/a4xx: fix error handling in a4xx_gpu_init() This code returns 1 on error instead of a negative error. It leads toan Oops in the caller. A second problem is that the check for"if (ret != -ENODATA)" cannot be true because "re...

CVE-2021-47447

In the Linux kernel, the following vulnerability has been resolved: drm/msm/a3xx: fix error handling in a3xx_gpu_init() These error paths returned 1 on failure, instead of a negative errorcode. This would lead to an Oops in the caller. A second problem isthat the check for "if (ret != -ENODATA)" di...

CVE-2021-47448

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix possible stall on recvmsg() recvmsg() can enter an infinite loop if the caller provides theMSG_WAITALL, the data present in the receive queue is not sufficient tofulfill the request, and no more data is received by the p...

CVE-2021-47449

In the Linux kernel, the following vulnerability has been resolved: ice: fix locking for Tx timestamp tracking flush Commit 4dd0d5c33c3e ("ice: add lock around Tx timestamp tracker flush")added a lock around the Tx timestamp tracker flow which is used tocleanup any left over SKBs and prepare for de...

CVE-2021-47450

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix host stage-2 PGD refcount The KVM page-table library refcounts the pages of concatenated stage-2PGDs individually. However, when running KVM in protected mode, thehost's stage-2 PGD is currently managed by EL2 as a ...

CVE-2021-47451

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value Currently, when the rule related to IDLETIMER is added, idletimer_tg timerstructure is initialized by kmalloc on executing idletimer_tg_createfunction...

CVE-2021-47452

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: skip netdev events generated on netns removal syzbot reported following (harmless) WARN: WARNING: CPU: 1 PID: 2648 at net/netfilter/core.c:468nft_netdev_unregister_hooks net/netfilter/nf_tables_api.c:230 [inli...

CVE-2021-47453

In the Linux kernel, the following vulnerability has been resolved: ice: Avoid crash from unnecessary IDA free In the remove path, there is an attempt to free the aux_idx IDA whetherit was allocated or not. This can potentially cause a crash whenunloading the driver on systems that do not initializ...

CVE-2021-47454

In the Linux kernel, the following vulnerability has been resolved: powerpc/smp: do not decrement idle task preempt count in CPU offline With PREEMPT_COUNT=y, when a CPU is offlined and then onlined again, weget: BUG: scheduling while atomic: swapper/1/0/0x00000000no locks held by swapper/1/0.CPU: ...

CVE-2021-47455

In the Linux kernel, the following vulnerability has been resolved: ptp: Fix possible memory leak in ptp_clock_register() I got memory leak as follows when doing fault injection test: unreferenced object 0xffff88800906c618 (size 8):comm "i2c-idt82p33931", pid 4421, jiffies 4294948083 (age 13.188s)h...

CVE-2021-47456

In the Linux kernel, the following vulnerability has been resolved: can: peak_pci: peak_pci_remove(): fix UAF When remove the module peek_pci, referencing 'chan' again afterreleasing 'dev' will cause UAF. Fix this by releasing 'dev' later. The following log reveals it: [ 35.961814 ] BUG: KASAN: use...

CVE-2021-47457

In the Linux kernel, the following vulnerability has been resolved: can: isotp: isotp_sendmsg(): add result check for wait_event_interruptible() Using wait_event_interruptible() to wait for complete transmission,but do not check the result of wait_event_interruptible() which can beinterrupted. It w...

CVE-2021-47458

In the Linux kernel, the following vulnerability has been resolved: ocfs2: mount fails with buffer overflow in strlen Starting with kernel 5.11 built with CONFIG_FORTIFY_SOURCE mouting anocfs2 filesystem with either o2cb or pcmk cluster stack fails with thetrace below. Problem seems to be that stri...

CVE-2021-47459

In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv It will trigger UAF for rx_kref of j1939_priv as following. cpu0 cpu1 j1939_sk_bind(socket0, ndev0, ...)j1939_netdev_startj1939_sk_bind(socket1, ndev0, ...)j1939_n...

CVE-2021-47460

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix data corruption after conversion from inline format Commit 6dbf7bb55598 ("fs: Don't invalidate page buffers inblock_write_full_page()") uncovered a latent bug in ocfs2 conversionfrom inline inode format to a normal inode...

CVE-2021-47461

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: fix a race between writeprotect and exit_mmap() A race is possible when a process exits, its VMAs are removed byexit_mmap() and at the same time userfaultfd_writeprotect() is called. The race was detected by KASAN on a...

CVE-2021-47462

In the Linux kernel, the following vulnerability has been resolved: mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind() syzbot reported access to unitialized memory in mbind() [1] Issue came with commit bda420b98505 ("numa balancing: migrate on faultamong multiple bound...

CVE-2021-47463

In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page->mapping dereference in page_is_secretmem() Check for a NULL page->mapping before dereferencing the mapping inpage_is_secretmem(), as the page's mapping can be nullified while gup()is running, e.g....

CVE-2021-47464

In the Linux kernel, the following vulnerability has been resolved: audit: fix possible null-pointer dereference in audit_filter_rules Fix possible null-pointer dereference in audit_filter_rules. audit_filter_rules() error: we previously assumed 'ctx' could be null

CVE-2021-47465

In the Linux kernel, the following vulnerability has been resolved: KVM: PPC: Book3S HV: Fix stack handling in idle_kvm_start_guest() In commit 10d91611f426 ("powerpc/64s: Reimplement book3s idle code inC") kvm_start_guest() became idle_kvm_start_guest(). The old codeallocated a stack frame on the ...

CVE-2021-47466

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmem_cache_open() In error path, the random_seq of slub cache might be leaked. Fix thisby using __kmem_cache_release() to release all the relevant resources.

CVE-2021-47467

In the Linux kernel, the following vulnerability has been resolved: kunit: fix reference count leak in kfree_at_end The reference counting issue happens in the normal path ofkfree_at_end(). When kunit_alloc_and_get_resource() is invoked, thefunction forgets to handle the returned resource object, w...

CVE-2021-47468

In the Linux kernel, the following vulnerability has been resolved: isdn: mISDN: Fix sleeping function called from invalid context The driver can call card->isac.release() function from an atomiccontext. Fix this by calling this function after releasing the lock. The following log reveals it: [ ...

CVE-2021-47469

In the Linux kernel, the following vulnerability has been resolved: spi: Fix deadlock when adding SPI controllers on SPI buses Currently we have a global spi_add_lock which we take when adding newdevices so that we can check that we're not trying to reuse a chipselect that's already controlled. Thi...

CVE-2021-47470

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential use-after-free in slab_debugfs_fops When sysfs_slab_add failed, we shouldn't call debugfs_slab_add() for sbecause s will be freed soon. And slab_debugfs_fops will use s laterleading to a use-after-free.

CVE-2021-47471

In the Linux kernel, the following vulnerability has been resolved: drm: mxsfb: Fix NULL pointer dereference crash on unload The mxsfb->crtc.funcs may already be NULL when unloading the driver,in which case calling mxsfb_irq_disable() via drm_irq_uninstall() frommxsfb_unload() leads to NULL poin...

CVE-2021-47473

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els() Commit 8c0eb596baa5 ("[SCSI] qla2xxx: Fix a memory leak in an error path ofqla2x00_process_els()"), intended to change: bsg_job->request->msgcode == F...

CVE-2021-47474

In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix bulk-buffer overflow The driver is using endpoint-sized buffers but must not assume that thetx and rx buffers are of equal size or a malicious device could overflowthe slab-allocated receive buffer when doing b...

CVE-2021-47475

In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix transfer-buffer overflows The driver uses endpoint-sized USB transfer buffers but up untilrecently had no sanity checks on the sizes. Commit e1f13c879a7c ("staging: comedi: check validity of wMaxPacketSizeof us...

CVE-2021-47476

In the Linux kernel, the following vulnerability has been resolved: comedi: ni_usb6501: fix NULL-deref in command paths The driver uses endpoint-sized USB transfer buffers but had no sanitychecks on the sizes. This can lead to zero-size-pointer dereferences oroverflowed transfer buffers in ni6501_p...

CVE-2021-47477

In the Linux kernel, the following vulnerability has been resolved: comedi: dt9812: fix DMA buffers on stack USB transfer buffers are typically mapped for DMA and must not beallocated on the stack or transfers will fail. Allocate proper transfer buffers in the various command helpers andreturn an e...

CVE-2021-47478

In the Linux kernel, the following vulnerability has been resolved: isofs: Fix out of bound access for corrupted isofs image When isofs image is suitably corrupted isofs_read_inode() can read databeyond the end of buffer. Sanity-check the directory entry length beforeusing it.

CVE-2021-47479

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8712: fix use-after-free in rtl8712_dl_fw Syzbot reported use-after-free in rtl8712_dl_fw(). The problem was inrace condition between r871xu_dev_remove() ->ndo_open() callback. It's easy to see from crash log, that d...

CVE-2021-47480

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to makesure that the low-level device driver module won't be unloaded before SCSIhost instance is rel...

CVE-2021-47481

In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR Normally the zero fill would hide the missing initialization, but anerrant set to desc_size in reg_create() causes a crash: BUG: unable to handle page fault for address: ...

CVE-2021-47482

In the Linux kernel, the following vulnerability has been resolved: net: batman-adv: fix error handling Syzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem wasin wrong error handling in batadv_mesh_init(). Before this patch batadv_mesh_init() was calling batadv_mesh_free() in caseo...

CVE-2021-47483

In the Linux kernel, the following vulnerability has been resolved: regmap: Fix possible double-free in regcache_rbtree_exit() In regcache_rbtree_insert_to_block(), when 'present' realloc failed,the 'blk' which is supposed to assign to 'rbnode->block' will be freed,so 'rbnode->block' points a...

CVE-2021-47484

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix possible null pointer dereference. This patch fixes possible null pointer dereference in files"rvu_debugfs.c" and "rvu_nix.c"

CVE-2021-47485

In the Linux kernel, the following vulnerability has been resolved: IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields Overflowing either addrlimit or bytes_togo can allow userspace to triggera buffer overflow of kernel memory. Check for overflows in all the placesdoing math on...