CVSS: 7.1EPSS: 0%CPEs: 6EXPL: 0CVE-2024-38538 – net: bridge: xmit: make sure we have at least eth header len bytes
https://notcve.org/view.php?id=CVE-2024-38538
In the Linux kernel, the following vulnerability has been resolved: net: bridge: xmit: make sure we have at least eth header len bytes syzbot triggered an uninit value[1] error in bridge device's xmit path by sending a short (less than ETH_HLEN bytes) skb. To fix it check if we can actually pull that amount instead of assuming. Tested with dropwatch: drop at: br_dev_xmit+0xb93/0x12d0 [bridge] (0xffffffffc06739b3) origin: software timestamp: Mon May 13 11:31:53 2024 778214037 nsec protocol: 0x88a8 length: 2 original length: 2 drop reason: PKT_TOO_SMALL [1] BUG: KMSAN: uninit-value in br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 __netdev_start_xmit include/linux/netdevice.h:4903 [inline] netdev_start_xmit include/linux/netdevice.h:4917 [inline] xmit_one net/core/dev.c:3531 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3547 __dev_queue_xmit+0x34db/0x5350 net/core/dev.c:4341 dev_queue_xmit include/linux/netdevice.h:3091 [inline] __bpf_tx_skb net/core/filter.c:2136 [inline] __bpf_redirect_common net/core/filter.c:2180 [inline] __bpf_redirect+0x14a6/0x1620 net/core/filter.c:2187 ____bpf_clone_redirect net/core/filter.c:2460 [inline] bpf_clone_redirect+0x328/0x470 net/core/filter.c:2432 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2238 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] bpf_test_run+0x499/0xc30 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0x14ea/0x1f20 net/bpf/test_run.c:1058 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4269 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5678 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline] __se_sys_bpf kernel/bpf/syscall.c:5765 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765 x64_sys_call+0x96b/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net: bridge: xmit: asegúrese de tener al menos el encabezado eth len bytes syzbot desencadenó un error de valor uninit[1] en la ruta xmit del dispositivo puente al enviar un mensaje corto (menos de ETH_HLEN bytes) skb. Para solucionarlo, compruebe si realmente podemos retirar esa cantidad en lugar de suponerla. Probado con dropwatch: soltar en: br_dev_xmit+0xb93/0x12d0 [puente] (0xffffffffc06739b3) origen: marca de tiempo del software: lunes 13 de mayo 11:31:53 2024 778214037 protocolo nsec: 0x88a8 longitud: 2 longitud original: 2 motivo de caída: PKT_TOO_SMALL [1 ] ERROR: KMSAN: valor uninit en br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 __netdev_start_xmit include/linux/netdevice.h:4903 [en línea] netdev_start_xmit include/linux/netdevice.h:4917 [en línea] xmit_one net/core/dev.c:3531 [en línea] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3547 __dev_queue_xmit+0x34db/0x5350 net/core/dev .c:4341 dev_queue_xmit include/linux/netdevice.h:3091 [en línea] __bpf_tx_skb net/core/filter.c:2136 [en línea] __bpf_redirect_common net/core/filter.c:2180 [en línea] __bpf_redirect+0x14a6/0x1620 net/ Core/Filter.C: 2187 ____BPF_CLONE_REDIRECT NET/CORE/FILTRO.C: 2460 [Inline] BPF_CLONE_REDIRECT+0x328/0x470 NET/Core/Filter.c: 2432 ___ BPF_PROG_RUN+0X13FE/0XE0F0 KERNEL/BPF/BPF/CORE. 0xb5/0xe0 kernel/bpf/core.c:2238 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [en línea] __bpf_prog_run include/linux/filter.h:657 [en línea] bpf_prog_run include/linux/filter.h:664 [en línea ] bpf_test_run+0x499/0xc30 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0x14ea/0x1f20 net/bpf/test_run.c:1058 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4269 pf+0x6aa/0xd90 núcleo/ bpf/syscall.c:5678 __do_sys_bpf kernel/bpf/syscall.c:5767 [en línea] __se_sys_bpf kernel/bpf/syscall.c:5765 [en línea] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765 ys_call+0x96b /0x3b50 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:52 [en línea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+ 0x77/0x7f • https://git.kernel.org/stable/c/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 https://git.kernel.org/stable/c/c964429ef53f42098a6545a5dabeb1441c1e821d https://git.kernel.org/stable/c/28126b83f86ab9cc7936029c2dff845d3dcedba2 https://git.kernel.org/stable/c/1abb371147905ba250b4cc0230c4be7e90bea4d5 https://git.kernel.org/stable/c/f482fd4ce919836a49012b2d31b00fc36e2488f2 https://git.kernel.org/stable/c/5b5d669f569807c7ab07546e73c0741845a2547a https://git.kernel.org/stable/c/8bd67ebb50c0145fd2ca8681ab65eb7e8cde1afc https://access.redhat.com/security/cve/CVE-2024-38538 • CWE-99: Improper Control of Resource Identifiers ('Resource Injection') •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2024-36978 – net: sched: sch_multiq: fix possible OOB write in multiq_tune()
https://notcve.org/view.php?id=CVE-2024-36978
In the Linux kernel, the following vulnerability has been resolved: net: sched: sch_multiq: fix possible OOB write in multiq_tune() q->bands will be assigned to qopt->bands to execute subsequent code logic after kmalloc. So the old q->bands should not be used in kmalloc. Otherwise, an out-of-bounds write will occur. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: sched: sch_multiq: corrige posible escritura OOB en multiq_tune() q->bands se asignarán a qopt->bands para ejecutar la lógica de código posterior después de kmalloc. Por lo tanto, las antiguas q->bands no deberían usarse en kmalloc. De lo contrario, se producirá una escritura fuera de los límites. • https://git.kernel.org/stable/c/c2999f7fb05b87da4060e38150c70fa46794d82b https://git.kernel.org/stable/c/d5d9d241786f49ae7cbc08e7fc95a115e9d80f3d https://git.kernel.org/stable/c/52b1aa07cda6a199cd6754d3798c7759023bc70f https://git.kernel.org/stable/c/598572c64287aee0b75bbba4e2881496878860f3 https://git.kernel.org/stable/c/0f208fad86631e005754606c3ec80c0d44a11882 https://git.kernel.org/stable/c/54c2c171c11a798fe887b3ff72922aa9d1411c1e https://git.kernel.org/stable/c/d6fb5110e8722bc00748f22caeb650fe4672f129 https://git.kernel.org/stable/c/affc18fdc694190ca7575b9a86632a73b •
CVSS: 6.1EPSS: 0%CPEs: 7EXPL: 0CVE-2024-36974 – net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP
https://notcve.org/view.php?id=CVE-2024-36974
In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: always validate TCA_TAPRIO_ATTR_PRIOMAP If one TCA_TAPRIO_ATTR_PRIOMAP attribute has been provided, taprio_parse_mqprio_opt() must validate it, or userspace can inject arbitrary data to the kernel, the second time taprio_change() is called. First call (with valid attributes) sets dev->num_tc to a non zero value. Second call (with arbitrary mqprio attributes) returns early from taprio_parse_mqprio_opt() and bad things can happen. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: taprio: validar siempre TCA_TAPRIO_ATTR_PRIOMAP Si se ha proporcionado un atributo TCA_TAPRIO_ATTR_PRIOMAP, taprio_parse_mqprio_opt() debe validarlo, o el espacio de usuario puede inyectar datos arbitrarios al kernel, la segunda vez taprio_change () se llama. La primera llamada (con atributos válidos) establece dev->num_tc en un valor distinto de cero. La segunda llamada (con atributos mqprio arbitrarios) regresa temprano desde taprio_parse_mqprio_opt() y pueden suceder cosas malas. • https://git.kernel.org/stable/c/a3d43c0d56f1b94e74963a2fbadfb70126d92213 https://git.kernel.org/stable/c/c6041e7124464ce7e896ee3f912897ce88a0c4ec https://git.kernel.org/stable/c/6db4af09987cc5d5f0136bd46148b0e0460dae5b https://git.kernel.org/stable/c/d3dde4c217f0c31ab0621912e682b57e677dd923 https://git.kernel.org/stable/c/0bf6cc96612bd396048f57d63f1ad454a846e39c https://git.kernel.org/stable/c/724050ae4b76e4fae05a923cb54101d792cf4404 https://git.kernel.org/stable/c/c37a27a35eadb59286c9092c49c241270c802ae2 https://git.kernel.org/stable/c/f921a58ae20852d188f70842431ce6519 • CWE-787: Out-of-bounds Write •
CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 0CVE-2024-36971 – Android Kernel Remote Code Execution Vulnerability
https://notcve.org/view.php?id=CVE-2024-36971
In the Linux kernel, the following vulnerability has been resolved: net: fix __dst_negative_advice() race __dst_negative_advice() does not enforce proper RCU rules when sk->dst_cache must be cleared, leading to possible UAF. RCU rules are that we must first clear sk->sk_dst_cache, then call dst_release(old_dst). Note that sk_dst_reset(sk) is implementing this protocol correctly, while __dst_negative_advice() uses the wrong order. Given that ip6_negative_advice() has special logic against RTF_CACHE, this means each of the three ->negative_advice() existing methods must perform the sk_dst_reset() themselves. Note the check against NULL dst is centralized in __dst_negative_advice(), there is no need to duplicate it in various callbacks. Many thanks to Clement Lecigne for tracking this issue. This old bug became visible after the blamed commit, using UDP sockets. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net: fix __dst_negative_advice() race __dst_negative_advice() no aplica las reglas adecuadas de RCU cuando se debe borrar sk->dst_cache, lo que genera una posible UAF. Las reglas de RCU son que primero debemos borrar sk->sk_dst_cache y luego llamar a dst_release(old_dst). Tenga en cuenta que sk_dst_reset(sk) implementa este protocolo correctamente, mientras que __dst_negative_advice() utiliza el orden incorrecto. Dado que ip6_negative_advice() tiene una lógica especial contra RTF_CACHE, esto significa que cada uno de los tres ->negative_advice() métodos existentes debe realizar sk_dst_reset() ellos mismos. • https://git.kernel.org/stable/c/a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 https://git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad117f13 https://git.kernel.org/stable/c/db0082825037794c5dba9959c9de13ca34cc5e72 https://git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e532a6 https://git.kernel.org/stable/c/eacb8b195579c174a6d3e12a9690b206eb7f28cf https://git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991421b4 https://git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4d4508 https://git.kernel.org/stable/c/b8af8e6118a6605f0e495a58d591ca94a • CWE-416: Use After Free •
CVSS: 5.5EPSS: 0%CPEs: 6EXPL: 0CVE-2024-36969 – drm/amd/display: Fix division by zero in setup_dsc_config
https://notcve.org/view.php?id=CVE-2024-36969
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix division by zero in setup_dsc_config When slice_height is 0, the division by slice_height in the calculation of the number of slices will cause a division by zero driver crash. This leaves the kernel in a state that requires a reboot. This patch adds a check to avoid the division by zero. The stack trace below is for the 6.8.4 Kernel. I reproduced the issue on a Z16 Gen 2 Lenovo Thinkpad with a Apple Studio Display monitor connected via Thunderbolt. The amdgpu driver crashed with this exception when I rebooted the system with the monitor connected. kernel: ? • https://git.kernel.org/stable/c/a32c8f951c8a456c1c251e1dcdf21787f8066445 https://git.kernel.org/stable/c/91402e0e5de9124a3108db7a14163fcf9a6d322f https://git.kernel.org/stable/c/7e4f50dfc98c49b3dc6875a35c3112522fb25639 https://git.kernel.org/stable/c/f187fcbbb8f8bf10c6687f0beae22509369f7563 https://git.kernel.org/stable/c/308de6be0c9c7ba36915c0d398e771725c0ea911 https://git.kernel.org/stable/c/130afc8a886183a94cf6eab7d24f300014ff87ba • CWE-369: Divide By Zero •