CVE-2021-47554

In the Linux kernel, the following vulnerability has been resolved: vdpasim: avoid putting an uninitialized iovadomain The system will crash if we put an uninitialized iovadomain, this could happen when an error occurs before initializing the iovadomain in vdpasimcreate. BUG: kernel NULL pointer...

CVE-2021-47553

In the Linux kernel, the following vulnerability has been resolved: sched/scs: Reset task stack state in bringupcpu To hot unplug a CPU, the idle task on that CPU calls a few layers of C code before finally leaving the kernel. When KASAN is in use, poisoned shadow is left around for each of the...

CVE-2021-47555

In the Linux kernel, the following vulnerability has been resolved: net: vlan: fix underflow for the realdev refcnt Inject error before devholdrealdev in registervlandev, and execute the following testcase: ip link add dev dummy1 type dummy ip link add name dummy1.100 link dummy1 type vlan id 100...

CVE-2021-47524

In the Linux kernel, the following vulnerability has been resolved: serial: liteuart: fix minor-number leak on probe errors Make sure to release the allocated minor number before returning on probe errors...

CVE-2021-47554

In the Linux kernel, the following vulnerability has been resolved: vdpasim: avoid putting an uninitialized iovadomain The system will crash if we put an uninitialized iovadomain, this could happen when an error occurs before initializing the iovadomain in vdpasimcreate. BUG: kernel NULL pointer...

CVE-2021-47501

In the Linux kernel, the following vulnerability has been resolved: i40e: Fix NULL pointer dereference in i40edbgdumpdesc When trying to dump VFs VSI RX/TX descriptors using debugfs there was a crash due to NULL pointer dereference in i40edbgdumpdesc. Added a check to i40edbgdumpdesc that checks ...

CVE-2021-47572 net: nexthop: fix null pointer dereference when IPv6 is not enabled

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 !CONFIGIPV6 we'll hit a NULL pointer dereference1 in the error path of nhcreateipv6 due to calling...

CVE-2021-47567 powerpc/32: Fix hardlockup on vmap stack overflow

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 not activate MMU before reading task struct" a vmap stack overflow results in a hard lockup. This is because...

CVE-2021-47562 ice: fix vsi->txq_map sizing

In the Linux kernel, the following vulnerability has been resolved: ice: fix vsi-txqmap sizing The approach of having XDP queue per CPU regardless of user's setting exposed a hidden bug that could occur in case when Rx queue count differ from Tx queue count. Currently vsi-txqmap's size is equal t...

CVE-2021-47560

The CVE-2021-47560 issue affects the Linux kernel mlxsw: spectrum driver. When processing port up/down events from device firmware, the driver failed to bail out for CPU port 0 (local port 0), which exists but lacks a netdev, risking a NULL pointer dereference on netif_carrier_{on,off}(). The emb...

CVE-2021-47549 sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl

In the Linux kernel, the following vulnerability has been resolved: satafsl: fix UAF in satafslportstop when rmmod satafsl When the rmmod satafsl.ko command is executed in the PPC64 GNU/Linux, a bug is reported: ================================================================== BUG: Unable to...

CVE-2021-47541

CVE-2021-47541 targets the Linux kernel mlx4_en driver. In mlx4_en_try_alloc_resources(), mlx4_en_copy_priv() may free tmp->tx_cq on the error path, and later mlx4_en_alloc_resources() dereferences &tmp->tx_cq[t][i], risking a use-after-free. The fix adds a guard/check around mlx4_en_copy_p...

CVE-2021-47539 rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle()

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpcpeer leak in rxrpclookupbundle Need to call rxrpcputpeer for bundle candidate before kfree as it holds a ref to rxrpcpeer. DH: v2: Changed to abstract out the bundle freeing code into a function...

CVE-2021-47530 drm/msm: Fix wait_fence submitqueue leak

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Fix waitfence submitqueue leak We weren't dropping the submitqueue reference in all paths. In particular, when the fence has already been signalled. Split out a helper to simplify handling this in the various different...

CVE-2021-47526 serial: liteuart: Fix NULL pointer dereference in ->remove()

In the Linux kernel, the following vulnerability has been resolved: serial: liteuart: Fix NULL pointer dereference in -remove drvdata has to be set in probe - otherwise platformgetdrvdata causes null pointer dereference BUG in remove...

CVE-2021-47520 can: pch_can: pch_can_rx_normal: fix use after free

In the Linux kernel, the following vulnerability has been resolved: can: pchcan: pchcanrxnormal: fix use after free After calling netifreceiveskbskb, dereferencing skb is unsafe. Especially, the canframe cf which aliases skb memory is dereferenced just after the call netifreceiveskbskb. Reorderin...

CVE-2021-47519 can: m_can: m_can_read_fifo: fix memory leak in error branch

In the Linux kernel, the following vulnerability has been resolved: can: mcan: mcanreadfifo: fix memory leak in error branch In mcanreadfifo, if the second call to mcanfiforead fails, the function jump to the outfail label and returns without calling mcanreceiveskb. This means that the skb...

CVE-2021-47517 ethtool: do not perform operations on net devices being unregistered

In the Linux kernel, the following vulnerability has been resolved: ethtool: do not perform operations on net devices being unregistered There is a short period between a net device starts to be unregistered and when it is actually gone. In that time frame ethtool operations could still be...

CVE-2021-47511 ALSA: pcm: oss: Fix negative period/buffer sizes

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix negative period/buffer sizes The period size calculation in OSS layer may receive a negative value as an error, but the code there assumes only the positive values and handle them with sizet. Due to that, a to...

CVE-2021-47507 nfsd: Fix nsfd startup race (again)

In the Linux kernel, the following vulnerability has been resolved: nfsd: Fix nsfd startup race again Commit bd5ae9288d64 "nfsd: register pernet ops last, unregister first" has re-opened rpcpipefsevent race against nfsdnetid registration registerpernetsubsys which has been fixed by commit...