Linux Kernel Security Vulnerabilities

CVE-2021-47253

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix potential memory leak in DMUB hw_init [Why]On resume we perform DMUB hw_init which allocates memory:dm_resume->dm_dmub_hw_init->dc_dmub_srv_create->kzallocThat results in memory leak in suspend/resume ...

CVE-2021-47254

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in gfs2_glock_shrink_scan The GLF_LRU flag is checked under lru_lock in gfs2_glock_remove_from_lru() toremove the glock from the lru list in __gfs2_glock_put(). On the shrink scan path, the same flag is cle...

CVE-2021-47255

In the Linux kernel, the following vulnerability has been resolved: kvm: LAPIC: Restore guard to prevent illegal APIC register access Per the SDM, "any access that touches bytes 4 through 15 of an APICregister may cause undefined behavior and must not be executed."Worse, such an access in kvm_lapic...

CVE-2021-47256

In the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: make sure wait for page writeback in memory_failure Our syzkaller trigger the "BUG_ON(!list_empty(&inode->i_wb_list))" inclear_inode: kernel BUG at fs/inode.c:519!Internal error: Oops - BUG: 0 [#1] SMPModules ...

CVE-2021-47257

In the Linux kernel, the following vulnerability has been resolved: net: ieee802154: fix null deref in parse dev addr Fix a logic error that could result in a null deref if the user setsthe mode incorrectly for the given addr type.

CVE-2021-47258

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix error handling of scsi_host_alloc() After device is initialized via device_initialize(), or its name is set viadev_set_name(), the device has to be freed via put_device(). Otherwisedevice name will be leaked because...

CVE-2021-47259

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two differentexports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting s...

CVE-2021-47260

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix a potential NULL dereference in nfs_get_client() None of the callers are expecting NULL returns from nfs_get_client() sothis code will lead to an Oops. It's better to return an errorpointer. I expect that this is dead code...

CVE-2021-47261

In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Fix initializing CQ fragments buffer The function init_cq_frag_buf() can be called to initialize the current CQfragments buffer cq->buf, or the temporary cq->resize_buf that is filledduring CQ resize operation. Howev...

CVE-2021-47262

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message Use the __string() machinery provided by the tracing subystem to make acopy of the string literals consumed by the "nested VM-Enter failed"tracepoint. A complet...

CVE-2021-47263

In the Linux kernel, the following vulnerability has been resolved: gpio: wcd934x: Fix shift-out-of-bounds error bit-mask for pins 0 to 4 is BIT(0) to BIT(4) however we ended up with BIT(n - 1)which is not right, and this was caught by below usban check UBSAN: shift-out-of-bounds in drivers/gpio/gp...

CVE-2021-47264

In the Linux kernel, the following vulnerability has been resolved: ASoC: core: Fix Null-point-dereference in fmt_single_name() Check the return value of devm_kstrdup() in case ofNull-point-dereference.

CVE-2021-47265

In the Linux kernel, the following vulnerability has been resolved: RDMA: Verify port when creating flow rule Validate port value provided by the user and with that remove no longerneeded validation by the driver. The missing check in the mlx5_ib drivercould cause to the below oops. Call trace:_cre...

CVE-2021-47266

In the Linux kernel, the following vulnerability has been resolved: RDMA/ipoib: Fix warning caused by destroying non-initial netns After the commit 5ce2dced8e95 ("RDMA/ipoib: Set rtnl_link_ops for ipoibinterfaces"), if the IPoIB device is moved to non-initial netns,destroying that netns lets the de...

CVE-2021-47267

In the Linux kernel, the following vulnerability has been resolved: usb: fix various gadget panics on 10gbps cabling usb_assign_descriptors() is called with 5 parameters,the last 4 of which are the usb_descriptor_header for:full-speed (USB1.1 - 12Mbps [including USB1.0 low-speed @ 1.5Mbps),high-spe...

CVE-2021-47268

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: cancel vdm and state machine hrtimer when unregister tcpm port A pending hrtimer may expire after the kthread_worker of tcpm portis destroyed, see below kernel dump when do module unload, fix itby cancel the 2 hrt...

CVE-2021-47269

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: ep0: fix NULL pointer exception There is no validation of the index from dwc3_wIndex_to_dep() and we mightbe referring a non-existing ep and trigger a NULL pointer exception. Incertain configurations we might use fewer e...

CVE-2021-47270

In the Linux kernel, the following vulnerability has been resolved: usb: fix various gadgets null ptr deref on 10gbps cabling. This avoids a null pointer dereference inf_{ecm,eem,hid,loopback,printer,rndis,serial,sourcesink,subset,tcm}by simply reusing the 5gbps config for 10gbps.

CVE-2021-47271

In the Linux kernel, the following vulnerability has been resolved: usb: cdnsp: Fix deadlock issue in cdnsp_thread_irq_handler Patch fixes the following critical issue caused by deadlock which has beendetected during testing NCM class: smp: csd: Detected non-responsive CSD lock (#1) on CPU#0smp: cs...

CVE-2021-47272

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: gadget: Bail from dwc3_gadget_exit() if dwc->gadget is NULL There exists a possible scenario in which dwc3_gadget_init() can fail:during during host -> peripheral mode switch in dwc3_set_mode(), anda pending gadget...

CVE-2021-47273

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3-meson-g12a: fix usb2 PHY glue init when phy0 is disabled When only PHY1 is used (for example on Odroid-HC4), the regmap init codeuses the usb2 ports when doesn't initialize the PHY1 regmap entry. This fixes:Unable to hand...

CVE-2021-47274

In the Linux kernel, the following vulnerability has been resolved: tracing: Correct the length check which causes memory corruption We've suffered from severe kernel crashes due to memory corruption onour production environment, like, Call Trace:[1640542.554277] general protection fault: 0000 [#1]...

CVE-2021-47275

In the Linux kernel, the following vulnerability has been resolved: bcache: avoid oversized read request in cache missing code path In the cache missing code path of cached device, if a proper locationfrom the internal B+ tree is matched for a cache miss range, functioncached_dev_cache_miss() will ...

CVE-2021-47276

In the Linux kernel, the following vulnerability has been resolved: ftrace: Do not blindly read the ip address in ftrace_bug() It was reported that a bug on arm64 caused a bad ip address to be used forupdating into a nop in ftrace_init(), but the error path (rightfully)returned -EINVAL and not -EFA...

CVE-2021-47277

In the Linux kernel, the following vulnerability has been resolved: kvm: avoid speculation-based attacks from out-of-range memslot accesses KVM's mechanism for accessing guest memory translates a guest physicaladdress (gpa) to a host virtual address using the right-shifted gpa(also known as gfn) an...

CVE-2021-47278

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: pci_generic: Fix possible use-after-free in mhi_pci_remove() This driver's remove path calls del_timer(). However, that functiondoes not wait until the timer handler finishes. This means that thetimer handler may still be...

CVE-2021-47279

In the Linux kernel, the following vulnerability has been resolved: usb: misc: brcmstb-usb-pinmap: 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-2021-47280

In the Linux kernel, the following vulnerability has been resolved: drm: Fix use-after-free read in drm_getunique() There is a time-of-check-to-time-of-use error in drm_getunique() dueto retrieving file_priv->master prior to locking the device's mastermutex. An example can be seen in the crash r...

CVE-2021-47281

In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Fix race of snd_seq_timer_open() The timer instance per queue is exclusive, and snd_seq_timer_open()should have managed the concurrent accesses. It looks as if it'schecking the already existing timer instance at the begi...

CVE-2021-47282

In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: Fix out-of-bounds access with more than 4 slaves Commit 571e31fa60b3 ("spi: bcm2835: Cache CS register value for->prepare_message()") limited the number of slaves to 3 at compile-time.The limitation was necessitate...

CVE-2021-47283

In the Linux kernel, the following vulnerability has been resolved: net:sfc: fix non-freed irq in legacy irq mode SFC driver can be configured via modparam to work using MSI-X, MSI orlegacy IRQ interrupts. In the last one, the interrupt was not properlyreleased on module remove. It was not freed be...

CVE-2021-47284

In the Linux kernel, the following vulnerability has been resolved: isdn: mISDN: netjet: Fix crash in nj_probe: 'nj_setup' in netjet.c might fail with -EIO and in this case'card->irq' is initialized and is bigger than zero. A subsequent call to'nj_release' will free the irq that has not been req...

CVE-2021-47286

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Validate channel ID when processing command completions MHI reads the channel ID from the event ring element sent by thedevice which can be any value between 0 and 255. In order toprevent any out of bound accesses, ...

CVE-2021-47287

In the Linux kernel, the following vulnerability has been resolved: driver core: auxiliary bus: Fix memory leak when driver_register() fail If driver_register() returns with error we need to free the memoryallocated for auxdrv->driver.name before returning from__auxiliary_driver_register()

CVE-2021-47288

In the Linux kernel, the following vulnerability has been resolved: media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf() Fix an 11-year old bug in ngene_command_config_free_buf() whileaddressing the following warnings caught with -Warray-bounds: arch/alpha/include/asm/string.h:22:...

CVE-2021-47289

In the Linux kernel, the following vulnerability has been resolved: ACPI: fix NULL pointer dereference Commit 71f642833284 ("ACPI: utils: Fix reference counting infor_each_acpi_dev_match()") started doing "acpi_dev_put()" on a pointerthat was possibly NULL. That fails miserably, because that helper...

CVE-2021-47290

In the Linux kernel, the following vulnerability has been resolved: scsi: target: Fix NULL dereference on XCOPY completion CPU affinity control added with commit 39ae3edda325 ("scsi: target: core:Make completion affinity configurable") makes target_complete_cmd() queuework on a CPU based on se_tpg-...

CVE-2021-47291

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions While running the self-tests on a KASAN enabled kernel, I observed aslab-out-of-bounds splat very similar to the one reported incommit 821bbf79fe46 ("ipv6: Fix KASAN:...

CVE-2021-47292

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix memleak in io_init_wq_offload() I got memory leak report when doing fuzz test: BUG: memory leakunreferenced object 0xffff888107310a80 (size 96):comm "syz-executor.6", pid 4610, jiffies 4295140240 (age 20.135s)hex dump...

CVE-2021-47293

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_skbmod: Skip non-Ethernet packets Currently tcf_skbmod_act() assumes that packets use Ethernet as their L2protocol, which is not always the case. As an example, for CAN devices: $ ip link add dev vcan0 type vcan $ ip...

CVE-2021-47294

In the Linux kernel, the following vulnerability has been resolved: netrom: Decrease sock refcount when sock timers expire Commit 63346650c1a9 ("netrom: switch to sock timer API") switched to usesock timer API. It replaces mod_timer() by sk_reset_timer(), anddel_timer() by sk_stop_timer(). Function...

CVE-2021-47295

In the Linux kernel, the following vulnerability has been resolved: net: sched: fix memory leak in tcindex_partial_destroy_work Syzbot reported memory leak in tcindex_set_parms(). The problem was innon-freed perfect hash in tcindex_partial_destroy_work(). In tcindex_set_parms() new tcindex_data is ...

CVE-2021-47296

In the Linux kernel, the following vulnerability has been resolved: KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak vcpu_put is not called if the user copy fails. This can result in preemptnotifier corruption and crashes, among other issues.

CVE-2021-47297

In the Linux kernel, the following vulnerability has been resolved: net: fix uninit-value in caif_seqpkt_sendmsg When nr_segs equal to zero in iovec_from_user, the objectmsg->msg_iter.iov is uninit stack memory in caif_seqpkt_sendmsgwhich is defined in ___sys_sendmsg. So we cann't just judgemsg-...

CVE-2021-47298

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix potential memory leak on unlikely error case If skb_linearize is needed and fails we could leak a msg on the errorhandling. To fix ensure we kfree the msg block before returning error.Found during code review.

CVE-2021-47299

In the Linux kernel, the following vulnerability has been resolved: xdp, net: Fix use-after-free in bpf_xdp_link_release The problem occurs between dev_get_by_index() and dev_xdp_attach_link().At this point, dev_xdp_uninstall() is called. Then xdp link will not bedetached automatically when dev is ...

CVE-2021-47300

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix tail_call_reachable rejection for interpreter when jit failed During testing of f263a81451c1 ("bpf: Track subprog poke descriptors correctlyand fix use-after-free") under various failure conditions, for example, whenjit_su...

CVE-2021-47301

In the Linux kernel, the following vulnerability has been resolved: igb: Fix use-after-free error during reset Cleans the next descriptor to watch (next_to_watch) when cleaning theTX ring. Failure to do so can cause invalid memory accesses. If igb_poll() runswhile the controller is reset this can l...

CVE-2021-47302

In the Linux kernel, the following vulnerability has been resolved: igc: Fix use-after-free error during reset Cleans the next descriptor to watch (next_to_watch) when cleaning theTX ring. Failure to do so can cause invalid memory accesses. If igc_poll() runswhile the controller is being reset this...

CVE-2021-47303

In the Linux kernel, the following vulnerability has been resolved: bpf: Track subprog poke descriptors correctly and fix use-after-free Subprograms are calling map_poke_track(), but on program release there is nohook to call map_poke_untrack(). However, on program release, the aux memory(and poke ...