CVE-2021-47337

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix bad pointer dereference when ehandler kthread is invalid Commit 66a834d09293 "scsi: core: Fix error handling of scsihostalloc" changed the allocation logic to call putdevice to perform host cleanup with the...

CVE-2021-47424

The CVE-2021-47424 issue affects the Linux kernel i40e driver. When VSI setup fails during PF switch in i40e_probe(), the code attempted to free misc IRQ vectors in i40e_clear_interrupt_scheme, potentially freeing an IRQ that had not been allocated yet, leading to a kernel Oops (example trace sho...

CVE-2021-47424 i40e: Fix freeing of uninitialized misc IRQ vector

In the Linux kernel, the following vulnerability has been resolved: i40e: Fix freeing of uninitialized misc IRQ vector When VSI set up failed in i40eprobe as part of PF switch set up driver was trying to free misc IRQ vectors in i40eclearinterruptscheme and produced a kernel Oops: Trying to free...

CVE-2021-47418 net_sched: fix NULL deref in fifo_set_limit()

In the Linux kernel, the following vulnerability has been resolved: netsched: fix NULL deref in fifosetlimit syzbot reported another NULL deref in fifosetlimit 1 I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev ...

CVE-2021-47418 net_sched: fix NULL deref in fifo_set_limit()

In the Linux kernel, the following vulnerability has been resolved: netsched: fix NULL deref in fifosetlimit syzbot reported another NULL deref in fifosetlimit 1 I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev ...

CVE-2021-47410 drm/amdkfd: fix svm_migrate_fini warning

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix svmmigratefini warning Device manager releases device-specific resources when a driver disconnects from a device, devmmemunmappages and devmreleasememregion calls in svmmigratefini are redundant. It causes below...

CVE-2021-47410 drm/amdkfd: fix svm_migrate_fini warning

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix svmmigratefini warning Device manager releases device-specific resources when a driver disconnects from a device, devmmemunmappages and devmreleasememregion calls in svmmigratefini are redundant. It causes below...

CVE-2021-47402

CVE-2021-47402 affects the Linux kernel’s net: sched: flower (cls_flower). The issue arises from a use-after-free when filters are deleted concurrently due to missing RCU protection during fl_walk() iteration after a patch refactor. The provided advisories state that fl_walk() must obtain the RCU...

CVE-2021-47395 mac80211: limit injected vht mcs/nss in ieee80211_parse_tx_radiotap

In the Linux kernel, the following vulnerability has been resolved: mac80211: limit injected vht mcs/nss in ieee80211parsetxradiotap Limit max values for vht mcs and nss in ieee80211parsetxradiotap routine in order to fix the following warning reported by syzbot: WARNING: CPU: 0 PID: 10717 at...

CVE-2021-47387 cpufreq: schedutil: Use kobject release() method to free sugov_tunables

In the Linux kernel, the following vulnerability has been resolved: cpufreq: schedutil: Use kobject release method to free sugovtunables The struct sugovtunables is protected by the kobject, so we can't free it directly. Otherwise we would get a call trace like this: ODEBUG: free active active...

CVE-2021-47387 cpufreq: schedutil: Use kobject release() method to free sugov_tunables

In the Linux kernel, the following vulnerability has been resolved: cpufreq: schedutil: Use kobject release method to free sugovtunables The struct sugovtunables is protected by the kobject, so we can't free it directly. Otherwise we would get a call trace like this: ODEBUG: free active active...

CVE-2021-47387

CVE-2021-47387 is a Linux kernel vulnerability in the cpufreq: schedutil governor related to freeing sugov_tunables. The original sugov_tunables_free() was split: sugov_clear_global_tunables() clears the global_tunables, and a new sugov_tunables_free() is used as kobj_type::release to safely free...

CVE-2021-47375

In the Linux kernel, the following vulnerability has been resolved: blktrace: Fix uaf in blktrace access after removing by sysfs There is an use-after-free problem triggered by following process: P1sda P2sdb echo 0 /sys/block/sdb/trace/enable blktraceremovequeue synchronizercu blktracefree...

CVE-2021-47370 mptcp: ensure tx skbs always have the MPTCP ext

In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure tx skbs always have the MPTCP ext Due to signed/unsigned comparison, the expression: info-sizegoal - skb-len 0 evaluates to true when the size goal is smaller than the skb size. That results in lack of tx cache...

CVE-2021-47340 jfs: fix GPF in diFree

In the Linux kernel, the following vulnerability has been resolved: jfs: fix GPF in diFree Avoid passing inode with JFSSBIinode-isb-ipimap == NULL to diFree1. GFP will appear: struct inode ipimap = JFSSBIip-isb-ipimap; struct inomap imap = JFSIPipimap-iimap; JFSIP will return invalid pointer when...

CVE-2021-47309

In the Linux kernel, the following vulnerability has been resolved: net: validate lwtstate-data before returning from skbtunnelinfo skbtunnelinfo returns pointer of lwtstate-data as iptunnelinfo type without validation. lwtstate-data can have various types such as mplsiptunnelencap, etc and these...

CVE-2021-47274 tracing: Correct the length check which causes memory corruption

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 on our production environment, like, Call Trace: 1640542.554277 general protection fault: 0000 1...

CVE-2021-47246 net/mlx5e: Fix page reclaim for dead peer hairpin

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix page reclaim for dead peer hairpin When adding a hairpin flow, a firmware-side send queue is created for the peer net device, which claims some host memory pages for its internal ring buffer. If the peer net device...

CVE-2021-47246 net/mlx5e: Fix page reclaim for dead peer hairpin

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix page reclaim for dead peer hairpin When adding a hairpin flow, a firmware-side send queue is created for the peer net device, which claims some host memory pages for its internal ring buffer. If the peer net device...

CVE-2021-47246

CVE-2021-47246 affects the Linux kernel, specifically the mlx5e (Mellanox) networking path. The issue arises when adding a hairpin flow: a firmware-side send queue is created for the peer net device and reserves host memory pages for its ring buffer. If the peer device is removed/unbound before t...