CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-35803 – x86/efistub: Call mixed mode boot services on the firmware's stack
https://notcve.org/view.php?id=CVE-2024-35803
In the Linux kernel, the following vulnerability has been resolved: x86/efistub: Call mixed mode boot services on the firmware's stack Normally, the EFI stub calls into the EFI boot services using the stack that was live when the stub was entered. According to the UEFI spec, this stack needs to be at least 128k in size - this might seem large but all asynchronous processing and event handling in EFI runs from the same stack and so quite a lot of space may be used in practice. In mixed mode, the situation is a bit different: the bootloader calls the 32-bit EFI stub entry point, which calls the decompressor's 32-bit entry point, where the boot stack is set up, using a fixed allocation of 16k. This stack is still in use when the EFI stub is started in 64-bit mode, and so all calls back into the EFI firmware will be using the decompressor's limited boot stack. Due to the placement of the boot stack right after the boot heap, any stack overruns have gone unnoticed. However, commit 5c4feadb0011983b ("x86/decompressor: Move global symbol references to C code") moved the definition of the boot heap into C code, and now the boot stack is placed right at the base of BSS, where any overruns will corrupt the end of the .data section. While it would be possible to work around this by increasing the size of the boot stack, doing so would affect all x86 systems, and mixed mode systems are a tiny (and shrinking) fraction of the x86 installed base. So instead, record the firmware stack pointer value when entering from the 32-bit firmware, and switch to this stack every time a EFI boot service call is made. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: x86/efistub: llame a los servicios de arranque en modo mixto en la pila del firmware. • https://git.kernel.org/stable/c/2149f8a56e2ed345c7a4d022a79f6b8fc53ae926 https://git.kernel.org/stable/c/930775060ca348b8665f60eef14b204172d14f31 https://git.kernel.org/stable/c/fba7ee7187581b5bc222003e73e2592b398bb06d https://git.kernel.org/stable/c/725351c036452b7db5771a7bed783564bc4b99cc https://git.kernel.org/stable/c/cefcd4fe2e3aaf792c14c9e56dab89e3d7a65d02 •
CVSS: 6.2EPSS: 0%CPEs: 4EXPL: 0CVE-2024-35799 – drm/amd/display: Prevent crash when disable stream
https://notcve.org/view.php?id=CVE-2024-35799
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Prevent crash when disable stream [Why] Disabling stream encoder invokes a function that no longer exists. [How] Check if the function declaration is NULL in disable stream encoder. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/amd/display: evita fallos al deshabilitar la transmisión [Por qué] Al deshabilitar el codificador de transmisión se invoca una función que ya no existe. [Cómo] Compruebe si la declaración de función es NULL al desactivar el codificador de flujo. • https://git.kernel.org/stable/c/4356a2c3f296503c8b420ae8adece053960a9f06 https://git.kernel.org/stable/c/59772327d439874095516673b4b30c48bd83ca38 https://git.kernel.org/stable/c/2b17133a0a2e0e111803124dad09e803718d4a48 https://git.kernel.org/stable/c/72d72e8fddbcd6c98e1b02d32cf6f2b04e10bd1c • CWE-400: Uncontrolled Resource Consumption •
CVSS: 5.5EPSS: 0%CPEs: 9EXPL: 0CVE-2024-35789 – wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes
https://notcve.org/view.php?id=CVE-2024-35789
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes When moving a station out of a VLAN and deleting the VLAN afterwards, the fast_rx entry still holds a pointer to the VLAN's netdev, which can cause use-after-free bugs. Fix this by immediately calling ieee80211_check_fast_rx after the VLAN change. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: comprobar/borrar fast rx para cambios de VLAN que no sean 4addr sta Al mover una estación fuera de una VLAN y eliminar la VLAN después, la entrada fast_rx todavía contiene un puntero a netdev de la VLAN, lo que puede causar errores de uso después de la liberación. Solucione este problema llamando inmediatamente a ieee80211_check_fast_rx después del cambio de VLAN. CVE-2024-35789 is a vulnerability in the Linux kernel’s Wi-Fi subsystem (mac80211). • https://git.kernel.org/stable/c/ea9a0cfc07a7d3601cc680718d9cff0d6927a921 https://git.kernel.org/stable/c/be1dd9254fc115321d6fbee042026d42afc8d931 https://git.kernel.org/stable/c/e8b067c4058c0121ac8ca71559df8e2e08ff1a7e https://git.kernel.org/stable/c/c8bddbd91bc8e42c961a5e2cec20ab879f21100f https://git.kernel.org/stable/c/7eeabcea79b67cc29563e6a9a5c81f9e2c664d5b https://git.kernel.org/stable/c/6b948b54c8bd620725e0c906e44b10c0b13087a7 https://git.kernel.org/stable/c/2884a50f52313a7a911de3afcad065ddbb3d78fc https://git.kernel.org/stable/c/e8678551c0243f799b4859448781cbec1 •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-35784 – btrfs: fix deadlock with fiemap and extent locking
https://notcve.org/view.php?id=CVE-2024-35784
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix deadlock with fiemap and extent locking While working on the patchset to remove extent locking I got a lockdep splat with fiemap and pagefaulting with my new extent lock replacement lock. This deadlock exists with our normal code, we just don't have lockdep annotations with the extent locking so we've never noticed it. Since we're copying the fiemap extent to user space on every iteration we have the chance of pagefaulting. Because we hold the extent lock for the entire range we could mkwrite into a range in the file that we have mmap'ed. This would deadlock with the following stack trace [<0>] lock_extent+0x28d/0x2f0 [<0>] btrfs_page_mkwrite+0x273/0x8a0 [<0>] do_page_mkwrite+0x50/0xb0 [<0>] do_fault+0xc1/0x7b0 [<0>] __handle_mm_fault+0x2fa/0x460 [<0>] handle_mm_fault+0xa4/0x330 [<0>] do_user_addr_fault+0x1f4/0x800 [<0>] exc_page_fault+0x7c/0x1e0 [<0>] asm_exc_page_fault+0x26/0x30 [<0>] rep_movs_alternative+0x33/0x70 [<0>] _copy_to_user+0x49/0x70 [<0>] fiemap_fill_next_extent+0xc8/0x120 [<0>] emit_fiemap_extent+0x4d/0xa0 [<0>] extent_fiemap+0x7f8/0xad0 [<0>] btrfs_fiemap+0x49/0x80 [<0>] __x64_sys_ioctl+0x3e1/0xb50 [<0>] do_syscall_64+0x94/0x1a0 [<0>] entry_SYSCALL_64_after_hwframe+0x6e/0x76 I wrote an fstest to reproduce this deadlock without my replacement lock and verified that the deadlock exists with our existing locking. To fix this simply don't take the extent lock for the entire duration of the fiemap. This is safe in general because we keep track of where we are when we're searching the tree, so if an ordered extent updates in the middle of our fiemap call we'll still emit the correct extents because we know what offset we were on before. The only place we maintain the lock is searching delalloc. Since the delalloc stuff can change during writeback we want to lock the extent range so we have a consistent view of delalloc at the time we're checking to see if we need to set the delalloc flag. With this patch applied we no longer deadlock with my testcase. • https://git.kernel.org/stable/c/ded566b4637f1b6b4c9ba74e7d0b8493e93f19cf https://git.kernel.org/stable/c/89bca7fe6382d61e88c67a0b0e7bce315986fb8b https://git.kernel.org/stable/c/b0ad381fa7690244802aed119b478b4bdafc31dd •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-27419 – netrom: Fix data-races around sysctl_net_busy_read
https://notcve.org/view.php?id=CVE-2024-27419
In the Linux kernel, the following vulnerability has been resolved: netrom: Fix data-races around sysctl_net_busy_read We need to protect the reader reading the sysctl value because the value can be changed concurrently. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netrom: corrige carreras de datos alrededor de sysctl_net_busy_read Necesitamos proteger al lector que lee el valor de sysctl porque el valor se puede cambiar simultáneamente. • https://git.kernel.org/stable/c/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 https://git.kernel.org/stable/c/d623fd5298d95b65d27ef5a618ebf39541074856 https://git.kernel.org/stable/c/f9055fa2b2931261d5f89948ee5bc315b6a22d4a https://git.kernel.org/stable/c/bbf950a6e96a91cf8cf0c71117b94ed3fafc9dd3 https://git.kernel.org/stable/c/0866afaff19d8460308b022345ed116a12b1d0e1 https://git.kernel.org/stable/c/43464808669ba9d23996f0b6d875450191687caf https://git.kernel.org/stable/c/34cab94f7473e7b09f5205d4583fb5096cb63b5b https://git.kernel.org/stable/c/16d71319e29d5825ab53f263b59fdd8dc •