CVE-2022-49898 btrfs: fix tree mod log mishandling of reallocated nodes

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix tree mod log mishandling of reallocated nodes We have been seeing the following panic in production kernel BUG at fs/btrfs/tree-mod-log.c:677! invalid opcode: 0000 1 SMP RIP: 0010:treemodlogrewind+0x1b4/0x200 RSP:...

CVE-2022-49886

The CVE-2022-49886 issue affects the Linux kernel related to x86/tdx memory handling. The vulnerability stems from how private memory (TDX private memory, including kernel stacks/text) may trigger a virtualization exception (#VE) and the difficulty of handling such exceptions. The root cause desc...

CVE-2022-49882 KVM: Reject attempts to consume or refresh inactive gfn_to_pfn_cache

In the Linux kernel, the following vulnerability has been resolved: KVM: Reject attempts to consume or refresh inactive gfntopfncache Reject kvmgpccheck and kvmgpcrefresh if the cache is inactive. Not checking the active flag during refresh is particularly egregious, as KVM can end up with a vali...

CVE-2022-49869

CVE-2022-49869 (bnxt_en): In the Linux kernel bnxt_hwrm_set_coal() may crash during error recovery because rtnl_lock isn’t held for the entire sequence, allowing freed datastructures. The fix uses BNXT_STATE_OPEN rather than netif_running() to ensure the device is fully operational before reconfi...

CVE-2022-49835 ALSA: hda: fix potential memleak in 'add_widget_node'

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: fix potential memleak in 'addwidgetnode' As 'kobjectadd' may allocated memory for 'kobject-name' when return error. And in this function, if call 'kobjectadd' failed didn't free kobject. So call 'kobjectput' to recycli...

CVE-2022-49827

Summary (CVE-2022-49827) : In the Linux kernel DRM stack, a possible null pointer dereference could occur during vblank cleanup when __drmm_add_action() fails and drm_vblank_init_release() runs for a vblank with a NULL worker, leading to kthread_destroy_worker() dereference. The fix adds a NULL c...

CVE-2022-49813

In the Linux kernel, the following vulnerability has been resolved: net: ena: Fix error handling in enainit The enainit won't destroy workqueue created by createsinglethreadworkqueue when pciregisterdriver failed. Call destroyworkqueue when pciregisterdriver failed to prevent the resource leak...

CVE-2022-49796

The CVE-2022-49796 issue affects the Linux kernel tracing/kprobe path. It concerns a potential NULL pointer dereference in trace_array if test_gen_kprobe_cmd() fails after kprobe_event_gen_cmd_end(), where gen_kretprobe_test could reference an invalid trace_array after kprobe_event_delete(). The ...

CVE-2022-49790

CVE-2022-49790 concerns a Linux kernel vulnerability in the input driver for iforce. Syzbot reports an uninitialized value in iforce_init_device(), stemming from a length-check bug: the code in 6ac0aec6b0a6 allowed a read because it compared the requested read size against a valid length that cou...

CVE-2022-49783 x86/fpu: Drop fpregs lock before inheriting FPU permissions

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Drop fpregs lock before inheriting FPU permissions Mike Galbraith reported the following against an old fork of preempt-rt but the same issue also applies to the current preempt-rt tree. BUG: sleeping function called fro...

CVE-2022-49782 perf: Improve missing SIGTRAP checking

In the Linux kernel, the following vulnerability has been resolved: perf: Improve missing SIGTRAP checking To catch missing SIGTRAP we employ a WARN in perfeventoverflow, which fires if pendingsigtrap was already set: returning to user space without consuming pendingsigtrap, and then having the...

CVE-2022-49773

CVE-2022-49773 affects the Linux kernel (drm/amd/display for DCN314). Root cause: optc2_configure_crc() wraps optc1_configure_crc() plus extra registers not applicable to dcN314, which can trigger a warning trace. Mitigation/Fix: use optc1_configure_crc() directly. References note patches in kern...

CVE-2022-49773 drm/amd/display: Fix optc2_configure warning on dcn314

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix optc2configure warning on dcn314 Why dcn314 uses optc2configurecrc that wraps optc1configurecrc + set additional registers not applicable to dcn314. It's not critical but when used leads to warning like:...

CVE-2022-49773 drm/amd/display: Fix optc2_configure warning on dcn314

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix optc2configure warning on dcn314 Why dcn314 uses optc2configurecrc that wraps optc1configurecrc + set additional registers not applicable to dcn314. It's not critical but when used leads to warning like:...

CVE-2022-49770

CVE-2022-49770 describes a Linux kernel issue in the Ceph-related path where decoding snaps could leave first_realm and realm pointing to the same snaprealm memory, causing a use-after-free or BUG_ON. The description in the sources confirms the fix was applied to avoid putting the realm twice whe...

CVE-2022-49770 ceph: avoid putting the realm twice when decoding snaps fails

In the Linux kernel, the following vulnerability has been resolved: ceph: avoid putting the realm twice when decoding snaps fails When decoding the snaps fails it maybe leaving the 'firstrealm' and 'realm' pointing to the same snaprealm memory. And then it'll put it twice and could cause random...

CVE-2022-49769 gfs2: Check sb_bsize_shift after reading superblock

In the Linux kernel, the following vulnerability has been resolved: gfs2: Check sbbsizeshift after reading superblock Fuzzers like to scribble over sbbsizeshift but in reality it's very unlikely that this field would be corrupted on its own. Nevertheless it should be checked to avoid the...

CVE-2022-49767 9p/trans_fd: always use O_NONBLOCK read/write

In the Linux kernel, the following vulnerability has been resolved: 9p/transfd: always use ONONBLOCK read/write syzbot is reporting hung task at p9fdclose 1, for p9muxpollstop from p9conndestroy from p9fdclose is failing to interrupt already started kernelread from p9fdread from p9readwork and/or...

CVE-2022-49768 9p: trans_fd/p9_conn_cancel: drop client lock earlier

In the Linux kernel, the following vulnerability has been resolved: 9p: transfd/p9conncancel: drop client lock earlier syzbot reported a double-lock here and we no longer need this lock after requests have been moved off to local list: just drop the lock earlier...

CVE-2022-49767 9p/trans_fd: always use O_NONBLOCK read/write

In the Linux kernel, the following vulnerability has been resolved: 9p/transfd: always use ONONBLOCK read/write syzbot is reporting hung task at p9fdclose 1, for p9muxpollstop from p9conndestroy from p9fdclose is failing to interrupt already started kernelread from p9fdread from p9readwork and/or...