CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2022-49006 – tracing: Free buffers when a used dynamic event is removed
https://notcve.org/view.php?id=CVE-2022-49006
In the Linux kernel, the following vulnerability has been resolved: tracing: Free buffers when a used dynamic event is removed After 65536 dynamic events have been added and removed, the "type" field of the event then uses the first type number that is available (not currently used by other events). A type number is the identifier of the binary blobs in the tracing ring buffer (known as events) to map them to logic that can parse the binary blob. The issue is that if a dynamic event (like a kprobe event) is traced and is in the ring buffer, and then that event is removed (because it is dynamic, which means it can be created and destroyed), if another dynamic event is created that has the same number that new event's logic on parsing the binary blob will be used. To show how this can be an issue, the following can crash the kernel: # cd /sys/kernel/tracing # for i in `seq 65536`; do echo 'p:kprobes/foo do_sys_openat2 $arg1:u32' > kprobe_events # done For every iteration of the above, the writing to the kprobe_events will remove the old event and create a new one (with the same format) and increase the type number to the next available on until the type number reaches over 65535 which is the max number for the 16 bit type. After it reaches that number, the logic to allocate a new number simply looks for the next available number. When an dynamic event is removed, that number is then available to be reused by the next dynamic event created. That is, once the above reaches the max number, the number assigned to the event in that loop will remain the same. Now that means deleting one dynamic event and created another will reuse the previous events type number. • https://git.kernel.org/stable/c/77b44d1b7c28360910cdbd427fb62d485c08674c https://git.kernel.org/stable/c/1603feac154ff38514e8354e3079a455eb4801e2 https://git.kernel.org/stable/c/be111ebd8868d4b7c041cb3c6102e1ae27d6dc1d https://git.kernel.org/stable/c/417d5ea6e735e5d88ffb6c436cf2938f3f476dd1 https://git.kernel.org/stable/c/c52d0c8c4f38f7580cff61c4dfe1034c580cedfd https://git.kernel.org/stable/c/4313e5a613049dfc1819a6dfb5f94cf2caff9452 •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2022-49005 – ASoC: ops: Fix bounds check for _sx controls
https://notcve.org/view.php?id=CVE-2022-49005
In the Linux kernel, the following vulnerability has been resolved: ASoC: ops: Fix bounds check for _sx controls For _sx controls the semantics of the max field is not the usual one, max is the number of steps rather than the maximum value. This means that our check in snd_soc_put_volsw_sx() needs to just check against the maximum value. • https://git.kernel.org/stable/c/9e5c40b5706d8aae2cf70bd7e01f0b4575a642d0 https://git.kernel.org/stable/c/4977491e4b3aad8567f57e2a9992d251410c1db3 https://git.kernel.org/stable/c/9a12fcbf3c622f9bf6b110a873d62b0cba93972e https://git.kernel.org/stable/c/c33402b056de61104b6146dedbe138ca8d7ec62b https://git.kernel.org/stable/c/038f8b7caa74d29e020949a43ca368c93f6b29b9 https://git.kernel.org/stable/c/e8e07c5e25a29e2a6f119fd947f55d7a55eb8a13 https://git.kernel.org/stable/c/4f1e50d6a9cf9c1b8c859d449b5031cacfa8404e https://git.kernel.org/stable/c/ef6cd9eeb38062a145802b7b56be7ae10 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2022-49002 – iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init()
https://notcve.org/view.php?id=CVE-2022-49002
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init() for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL. If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. Add the missing pci_dev_put() for the error path to avoid reference count leak. • https://git.kernel.org/stable/c/2e45528930388658603ea24d49cf52867b928d3e https://git.kernel.org/stable/c/d47bc9d7bcdbb9adc9703513d964b514fee5b0bf https://git.kernel.org/stable/c/71c4a621985fc051ab86d3a86c749069a993fcb2 https://git.kernel.org/stable/c/876d7bfb89273997056220029ff12b1c2cc4691d https://git.kernel.org/stable/c/cbdd83bd2fd67142b03ce9dbdd1eab322ff7321f https://git.kernel.org/stable/c/a5c65cd56aed027f8a97fda8b691caaeb66d115e https://git.kernel.org/stable/c/bdb613ef179ad4bb9d56a2533e9b30e434f1dfb7 https://git.kernel.org/stable/c/2a8f7b90681472948de172dbbf5a54cd3 •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2022-48994 – ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event
https://notcve.org/view.php?id=CVE-2022-48994
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. seq_copy_in_user() and seq_copy_in_kernel() did not have prototypes matching snd_seq_dump_func_t. Adjust this and remove the casts. There are not resulting binary output differences. This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches. • https://git.kernel.org/stable/c/b38486e82ecb9f3046e0184205f6b61408fc40c9 https://git.kernel.org/stable/c/e385360705a0b346bdb57ce938249175d0613b8a https://git.kernel.org/stable/c/2f46e95bf344abc4e74f8158901d32a869e0adb6 https://git.kernel.org/stable/c/63badfed200219ca656968725f1a43df293ac936 https://git.kernel.org/stable/c/15c42ab8d43acb73e2eba361ad05822c0af0ecfa https://git.kernel.org/stable/c/fccd454129f6a0739651f7f58307cdb631fd6e89 https://git.kernel.org/stable/c/13ee8fb5410b740c8dd2867d3557c7662f7dda2d https://git.kernel.org/stable/c/05530ef7cf7c7d700f6753f058999b1b5 •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2022-48993 – fbcon: Use kzalloc() in fbcon_prepare_logo()
https://notcve.org/view.php?id=CVE-2022-48993
In the Linux kernel, the following vulnerability has been resolved: fbcon: Use kzalloc() in fbcon_prepare_logo() A kernel built with syzbot's config file reported that scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)) causes uninitialized "save" to be copied. ---------- [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0 [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1 Console: switching to colour frame buffer device 128x48 ===================================================== BUG: KMSAN: uninit-value in do_update_region+0x4b8/0xba0 do_update_region+0x4b8/0xba0 update_region+0x40d/0x840 fbcon_switch+0x3364/0x35e0 redraw_screen+0xae3/0x18a0 do_bind_con_driver+0x1cb3/0x1df0 do_take_over_console+0x11cb/0x13f0 fbcon_fb_registered+0xacc/0xfd0 register_framebuffer+0x1179/0x1320 __drm_fb_helper_initial_config_and_unlock+0x23ad/0x2b40 drm_fbdev_client_hotplug+0xbea/0xda0 drm_fbdev_generic_setup+0x65e/0x9d0 vkms_init+0x9f3/0xc76 (...snipped...) Uninit was stored to memory at: fbcon_prepare_logo+0x143b/0x1940 fbcon_init+0x2c1b/0x31c0 visual_init+0x3e7/0x820 do_bind_con_driver+0x14a4/0x1df0 do_take_over_console+0x11cb/0x13f0 fbcon_fb_registered+0xacc/0xfd0 register_framebuffer+0x1179/0x1320 __drm_fb_helper_initial_config_and_unlock+0x23ad/0x2b40 drm_fbdev_client_hotplug+0xbea/0xda0 drm_fbdev_generic_setup+0x65e/0x9d0 vkms_init+0x9f3/0xc76 (...snipped...) Uninit was created at: __kmem_cache_alloc_node+0xb69/0x1020 __kmalloc+0x379/0x680 fbcon_prepare_logo+0x704/0x1940 fbcon_init+0x2c1b/0x31c0 visual_init+0x3e7/0x820 do_bind_con_driver+0x14a4/0x1df0 do_take_over_console+0x11cb/0x13f0 fbcon_fb_registered+0xacc/0xfd0 register_framebuffer+0x1179/0x1320 __drm_fb_helper_initial_config_and_unlock+0x23ad/0x2b40 drm_fbdev_client_hotplug+0xbea/0xda0 drm_fbdev_generic_setup+0x65e/0x9d0 vkms_init+0x9f3/0xc76 (...snipped...) CPU: 2 PID: 1 Comm: swapper/0 Not tainted 6.1.0-rc4-00356-g8f2975c2bb4c #924 Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 ---------- • https://git.kernel.org/stable/c/20e78b7d1c1019789d9754ad9246192916f1a3b4 https://git.kernel.org/stable/c/9d5126b574c9177ed9ca925e36f85a1e6ce80bd2 https://git.kernel.org/stable/c/d9b53caf0191cee24afd05ca6c83ed873199b52d https://git.kernel.org/stable/c/e70a5724400a841c9857ee3d08dae4d6c53ee40d https://git.kernel.org/stable/c/9bbebc6aba72ece39a200c8141f44e68ba883877 https://git.kernel.org/stable/c/a6a00d7e8ffd78d1cdb7a43f1278f081038c638f •