CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2023-52463 – efivarfs: force RO when remounting if SetVariable is not supported
https://notcve.org/view.php?id=CVE-2023-52463
In the Linux kernel, the following vulnerability has been resolved: efivarfs: force RO when remounting if SetVariable is not supported If SetVariable at runtime is not supported by the firmware we never assign a callback for that function. At the same time mount the efivarfs as RO so no one can call that. However, we never check the permission flags when someone remounts the filesystem as RW. As a result this leads to a crash looking like this: $ mount -o remount,rw /sys/firmware/efi/efivars $ efi-updatevar -f PK.auth PK [ 303.279166] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 303.280482] Mem abort info: [ 303.280854] ESR = 0x0000000086000004 [ 303.281338] EC = 0x21: IABT (current EL), IL = 32 bits [ 303.282016] SET = 0, FnV = 0 [ 303.282414] EA = 0, S1PTW = 0 [ 303.282821] FSC = 0x04: level 0 translation fault [ 303.283771] user pgtable: 4k pages, 48-bit VAs, pgdp=000000004258c000 [ 303.284913] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 [ 303.286076] Internal error: Oops: 0000000086000004 [#1] PREEMPT SMP [ 303.286936] Modules linked in: qrtr tpm_tis tpm_tis_core crct10dif_ce arm_smccc_trng rng_core drm fuse ip_tables x_tables ipv6 [ 303.288586] CPU: 1 PID: 755 Comm: efi-updatevar Not tainted 6.3.0-rc1-00108-gc7d0c4695c68 #1 [ 303.289748] Hardware name: Unknown Unknown Product/Unknown Product, BIOS 2023.04-00627-g88336918701d 04/01/2023 [ 303.291150] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 303.292123] pc : 0x0 [ 303.292443] lr : efivar_set_variable_locked+0x74/0xec [ 303.293156] sp : ffff800008673c10 [ 303.293619] x29: ffff800008673c10 x28: ffff0000037e8000 x27: 0000000000000000 [ 303.294592] x26: 0000000000000800 x25: ffff000002467400 x24: 0000000000000027 [ 303.295572] x23: ffffd49ea9832000 x22: ffff0000020c9800 x21: ffff000002467000 [ 303.296566] x20: 0000000000000001 x19: 00000000000007fc x18: 0000000000000000 [ 303.297531] x17: 0000000000000000 x16: 0000000000000000 x15: 0000aaaac807ab54 [ 303.298495] x14: ed37489f673633c0 x13: 71c45c606de13f80 x12: 47464259e219acf4 [ 303.299453] x11: ffff000002af7b01 x10: 0000000000000003 x9 : 0000000000000002 [ 303.300431] x8 : 0000000000000010 x7 : ffffd49ea8973230 x6 : 0000000000a85201 [ 303.301412] x5 : 0000000000000000 x4 : ffff0000020c9800 x3 : 00000000000007fc [ 303.302370] x2 : 0000000000000027 x1 : ffff000002467400 x0 : ffff000002467000 [ 303.303341] Call trace: [ 303.303679] 0x0 [ 303.303938] efivar_entry_set_get_size+0x98/0x16c [ 303.304585] efivarfs_file_write+0xd0/0x1a4 [ 303.305148] vfs_write+0xc4/0x2e4 [ 303.305601] ksys_write+0x70/0x104 [ 303.306073] __arm64_sys_write+0x1c/0x28 [ 303.306622] invoke_syscall+0x48/0x114 [ 303.307156] el0_svc_common.constprop.0+0x44/0xec [ 303.307803] do_el0_svc+0x38/0x98 [ 303.308268] el0_svc+0x2c/0x84 [ 303.308702] el0t_64_sync_handler+0xf4/0x120 [ 303.309293] el0t_64_sync+0x190/0x194 [ 303.309794] Code: ???????? ???????? • https://git.kernel.org/stable/c/f88814cc2578c121e6edef686365036db72af0ed https://git.kernel.org/stable/c/552952e51fad35670459674bcb8a03bd96fe4646 https://git.kernel.org/stable/c/94c742324ed7e42c5bd6a9ed22e4ec6d764db4d8 https://git.kernel.org/stable/c/2aa141f8bc580f8f9811dfe4e0e6009812b73826 https://git.kernel.org/stable/c/d4a9aa7db574a0da64307729cc031fb68597aa8b https://git.kernel.org/stable/c/0049fe7e4a85849bdd778cdb72e51a791ff3d737 https://git.kernel.org/stable/c/d4a714873db0866cc471521114eeac4a5072d548 https://git.kernel.org/stable/c/0e8d2444168dd519fea501599d150e627 • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 6EXPL: 0CVE-2023-52462 – bpf: fix check for attempt to corrupt spilled pointer
https://notcve.org/view.php?id=CVE-2023-52462
In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: bpf: revisión de corrección para intentar dañar el puntero derramado Cuando el registro se derrama en una pila como un registro de 1/2/4 bytes, configuramos slot_type[BPF_REG_SIZE - 1] (más potencialmente algunos más debajo de él, dependiendo del tamaño real del derrame). Entonces, para verificar si alguna ranura de la pila se ha desbordado, debemos consultar slot_type[7], no slot_type[0]. Para evitar la necesidad de recordar y volver a verificar esto en el futuro, simplemente use el asistente is_spilled_reg(). • https://git.kernel.org/stable/c/cdd73a5ed0840da88a3b9ad353f568e6f156d417 https://git.kernel.org/stable/c/07c286c10a9cedbd71f20269ff3a4e73d9aab2fe https://git.kernel.org/stable/c/27113c59b6d0a587b29ae72d4ff3f832f58b0651 https://git.kernel.org/stable/c/2757f17972d87773b3677777f5682510f13c66ef https://git.kernel.org/stable/c/67e6707f07354ed1acb4e65552e97c60cf9d69cf https://git.kernel.org/stable/c/fc3e3c50a0a4cac1463967c110686189e4a59104 https://git.kernel.org/stable/c/8dc15b0670594543c356567a1a45b0182ec63174 https://git.kernel.org/stable/c/40617d45ea05535105e202a8a819e388a •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2023-52461 – drm/sched: Fix bounds limiting when given a malformed entity
https://notcve.org/view.php?id=CVE-2023-52461
In the Linux kernel, the following vulnerability has been resolved: drm/sched: Fix bounds limiting when given a malformed entity If we're given a malformed entity in drm_sched_entity_init()--shouldn't happen, but we verify--with out-of-bounds priority value, we set it to an allowed value. Fix the expression which sets this limit. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/sched: corrige los límites que limitan cuando se proporciona una entidad con formato incorrecto. Si se nos proporciona una entidad con formato incorrecto en drm_sched_entity_init(), no debería suceder, pero lo verificamos, sin valor de prioridad de los límites, lo configuramos en un valor permitido. Fije la expresión que establece este límite. • https://git.kernel.org/stable/c/56e449603f0ac580700621a356d35d5716a62ce5 https://git.kernel.org/stable/c/1470d173925d697b497656b93f7c5bddae2e64b2 https://git.kernel.org/stable/c/2bbe6ab2be53858507f11f99f856846d04765ae3 •
CVSS: 5.5EPSS: 0%CPEs: 2EXPL: 0CVE-2023-52460 – drm/amd/display: Fix NULL pointer dereference at hibernate
https://notcve.org/view.php?id=CVE-2023-52460
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix NULL pointer dereference at hibernate During hibernate sequence the source context might not have a clk_mgr. So don't use it to look for DML2 support. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: corrige la desreferencia del puntero NULL en hibernación. Durante la secuencia de hibernación, es posible que el contexto de origen no tenga clk_mgr. Así que no lo utilices para buscar compatibilidad con DML2. • https://git.kernel.org/stable/c/7966f319c66d9468623c6a6a017ecbc0dd79be75 https://git.kernel.org/stable/c/6b80326efff093d037e0971831dca6ebddba9b45 https://git.kernel.org/stable/c/b719a9c15d52d4f56bdea8241a5d90fd9197ce99 • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52459 – media: v4l: async: Fix duplicated list deletion
https://notcve.org/view.php?id=CVE-2023-52459
In the Linux kernel, the following vulnerability has been resolved: media: v4l: async: Fix duplicated list deletion The list deletion call dropped here is already called from the helper function in the line before. Having a second list_del() call results in either a warning (with CONFIG_DEBUG_LIST=y): list_del corruption, c46c8198->next is LIST_POISON1 (00000100) If CONFIG_DEBUG_LIST is disabled the operation results in a kernel error due to NULL pointer dereference. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: medios: v4l: async: corregir eliminación de lista duplicada La llamada de eliminación de lista descartada aquí ya se llama desde la función auxiliar en la línea anterior. Tener una segunda llamada a list_del() da como resultado una advertencia (con CONFIG_DEBUG_LIST=y): corrupción de list_del, c46c8198->el siguiente es LIST_POISON1 (00000100). Si CONFIG_DEBUG_LIST está deshabilitado, la operación genera un error del kernel debido a la desreferencia del puntero NULL. • https://git.kernel.org/stable/c/28a1295795d85a25f2e7dd391c43969e95fcb341 https://git.kernel.org/stable/c/b7062628caeaec90e8f691ebab2d70f31b7b6b91 https://git.kernel.org/stable/c/49d82811428469566667f22749610b8c132cdb3e https://git.kernel.org/stable/c/3de6ee94aae701fa949cd3b5df6b6a440ddfb8f2 • CWE-476: NULL Pointer Dereference •