CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-26996 – usb: gadget: f_ncm: Fix UAF ncm object at re-bind after usb ep transport error
https://notcve.org/view.php?id=CVE-2024-26996
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: Fix UAF ncm object at re-bind after usb ep transport error When ncm function is working and then stop usb0 interface for link down, eth_stop() is called. At this piont, accidentally if usb transport error should happen in usb_ep_enable(), 'in_ep' and/or 'out_ep' may not be enabled. After that, ncm_disable() is called to disable for ncm unbind but gether_disconnect() is never called since 'in_ep' is not enabled. As the result, ncm object is released in ncm unbind but 'dev->port_usb' associated to 'ncm->port' is not NULL. And when ncm bind again to recover netdev, ncm object is reallocated but usb0 interface is already associated to previous released ncm object. Therefore, once usb0 interface is up and eth_start_xmit() is called, released ncm object is dereferrenced and it might cause use-after-free memory. [function unlink via configfs] usb0: eth_stop dev->port_usb=ffffff9b179c3200 --> error happens in usb_ep_enable(). NCM: ncm_disable: ncm=ffffff9b179c3200 --> no gether_disconnect() since ncm->port.in_ep->enabled is false. NCM: ncm_unbind: ncm unbind ncm=ffffff9b179c3200 NCM: ncm_free: ncm free ncm=ffffff9b179c3200 <-- released ncm [function link via configfs] NCM: ncm_alloc: ncm alloc ncm=ffffff9ac4f8a000 NCM: ncm_bind: ncm bind ncm=ffffff9ac4f8a000 NCM: ncm_set_alt: ncm=ffffff9ac4f8a000 alt=0 usb0: eth_open dev->port_usb=ffffff9b179c3200 <-- previous released ncm usb0: eth_start dev->port_usb=ffffff9b179c3200 <-- eth_start_xmit() --> dev->wrap() Unable to handle kernel paging request at virtual address dead00000000014f This patch addresses the issue by checking if 'ncm->netdev' is not NULL at ncm_disable() to call gether_disconnect() to deassociate 'dev->port_usb'. It's more reasonable to check 'ncm->netdev' to call gether_connect/disconnect rather than check 'ncm->port.in_ep->enabled' since it might not be enabled but the gether connection might be established. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: gadget: f_ncm: corrige el objeto UAF ncm al volver a vincularlo después del error de transporte usb ep Cuando la función ncm está funcionando y luego detiene la interfaz usb0 para desconectar el enlace, se llama a eth_stop() . En este punto, accidentalmente, si ocurre un error de transporte USB en usb_ep_enable(), es posible que 'in_ep' y/o 'out_ep' no estén habilitados. Después de eso, se llama a ncm_disable() para deshabilitar ncm unbind, pero nunca se llama a gether_disconnect() ya que 'in_ep' no está habilitado. • https://git.kernel.org/stable/c/7f67c2020cb08499c400abf0fc32c65e4d9a09ca https://git.kernel.org/stable/c/0588bbbd718a8130b98c54518f1e0b569ce60a93 https://git.kernel.org/stable/c/f356fd0cbd9c9cbd0854657a80d1608d0d732db3 https://git.kernel.org/stable/c/7250326cbb1f4f90391ac511a126b936cefb5bb7 https://git.kernel.org/stable/c/6334b8e4553cc69f51e383c9de545082213d785e •
CVSS: 5.9EPSS: 0%CPEs: 8EXPL: 0CVE-2024-26994 – speakup: Avoid crash on very long word
https://notcve.org/view.php?id=CVE-2024-26994
In the Linux kernel, the following vulnerability has been resolved: speakup: Avoid crash on very long word In case a console is set up really large and contains a really long word (> 256 characters), we have to stop before the length of the word buffer. En el kernel de Linux se ha solucionado la siguiente vulnerabilidad: Speakup: Evitar crash en palabras muy largas En caso de que una consola esté configurada muy grande y contenga una palabra muy larga (>256 caracteres), tenemos que detenernos antes de la longitud de la palabra. búfer de palabras. • https://git.kernel.org/stable/c/c6e3fd22cd538365bfeb82997d5b89562e077d42 https://git.kernel.org/stable/c/756c5cb7c09e537b87b5d3acafcb101b2ccf394f https://git.kernel.org/stable/c/8f6b62125befe1675446923e4171eac2c012959c https://git.kernel.org/stable/c/6401038acfa24cba9c28cce410b7505efadd0222 https://git.kernel.org/stable/c/0d130158db29f5e0b3893154908cf618896450a8 https://git.kernel.org/stable/c/89af25bd4b4bf6a71295f07e07a8ae7dc03c6595 https://git.kernel.org/stable/c/8defb1d22ba0395b81feb963b96e252b097ba76f https://git.kernel.org/stable/c/0efb15c14c493263cb3a5f65f5ddfd460 •
CVSS: 5.5EPSS: 0%CPEs: 14EXPL: 0CVE-2024-26993 – fs: sysfs: Fix reference leak in sysfs_break_active_protection()
https://notcve.org/view.php?id=CVE-2024-26993
In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious reference leak in its error path. If the call to kernfs_find_and_get() fails then kn will be NULL, so the companion sysfs_unbreak_active_protection() routine won't get called (and would only cause an access violation by trying to dereference kn->parent if it was called). As a result, the reference to kobj acquired at the start of the function will never be released. Fix the leak by adding an explicit kobject_put() call when kn is NULL. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs: sysfs: corrige la fuga de referencia en sysfs_break_active_protection() La rutina sysfs_break_active_protection() tiene una fuga de referencia obvia en su ruta de error. Si la llamada a kernfs_find_and_get() falla, entonces kn será NULL, por lo que no se llamará a la rutina complementaria sysfs_unbreak_active_protection() (y solo causaría una infracción de acceso al intentar eliminar la referencia a kn->parent si se llamara). • https://git.kernel.org/stable/c/2afc9166f79b8f6da5f347f48515215ceee4ae37 https://git.kernel.org/stable/c/e8a37b2fd5b5087bec6cbbf6946ee3caa712953b https://git.kernel.org/stable/c/a6abc93760dd07fcd29760b70e6e7520f22cb288 https://git.kernel.org/stable/c/461a6385e58e8247e6ba2005aa5d1b8d980ee4a2 https://git.kernel.org/stable/c/8a5e02a0f46ea33ed19e48e096a8e8d28e73d10a https://git.kernel.org/stable/c/c984f4d1d40a2f349503b3faf946502ccbf02f9f https://git.kernel.org/stable/c/807d1d299a04e9ad9a9dac55419c1137a105254b https://git.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c •
CVSS: 5.5EPSS: 0%CPEs: 6EXPL: 0CVE-2024-26988 – init/main.c: Fix potential static_command_line memory overflow
https://notcve.org/view.php?id=CVE-2024-26988
In the Linux kernel, the following vulnerability has been resolved: init/main.c: Fix potential static_command_line memory overflow We allocate memory of size 'xlen + strlen(boot_command_line) + 1' for static_command_line, but the strings copied into static_command_line are extra_command_line and command_line, rather than extra_command_line and boot_command_line. When strlen(command_line) > strlen(boot_command_line), static_command_line will overflow. This patch just recovers strlen(command_line) which was miss-consolidated with strlen(boot_command_line) in the commit f5c7310ac73e ("init/main: add checks for the return value of memblock_alloc*()") En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: init/main.c: soluciona un posible desbordamiento de memoria de static_command_line Asignamos memoria de tamaño 'xlen + strlen(boot_command_line) + 1' para static_command_line, pero las cadenas copiadas en static_command_line son extra_command_line y command_line, en lugar de extra_command_line y boot_command_line. Cuando strlen(command_line) > strlen(boot_command_line), static_command_line se desbordará. Este parche simplemente recupera strlen(command_line) que no se consolidó con strlen(boot_command_line) en el commit f5c7310ac73e ("init/main: agregue comprobaciones para el valor de retorno de memblock_alloc*()") A static_command_line memory overflow was found in the Linux kernel. This issue may cause a crash. • https://git.kernel.org/stable/c/f5c7310ac73ea270e3a1acdb73d1b4817f11fd67 https://git.kernel.org/stable/c/2ef607ea103616aec0289f1b65d103d499fa903a https://git.kernel.org/stable/c/0dc727a4e05400205358a22c3d01ccad2c8e1fe4 https://git.kernel.org/stable/c/76c2f4d426a5358fced5d5990744d46f10a4ccea https://git.kernel.org/stable/c/81cf85ae4f2dd5fa3e43021782aa72c4c85558e8 https://git.kernel.org/stable/c/936a02b5a9630c5beb0353c3085cc49d86c57034 https://git.kernel.org/stable/c/46dad3c1e57897ab9228332f03e1c14798d2d3b9 https://lists.debian.org/debian-lts-announce/2024/06/ •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2024-26984 – nouveau: fix instmem race condition around ptr stores
https://notcve.org/view.php?id=CVE-2024-26984
In the Linux kernel, the following vulnerability has been resolved: nouveau: fix instmem race condition around ptr stores Running a lot of VK CTS in parallel against nouveau, once every few hours you might see something like this crash. BUG: kernel NULL pointer dereference, address: 0000000000000008 PGD 8000000114e6e067 P4D 8000000114e6e067 PUD 109046067 PMD 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 7 PID: 53891 Comm: deqp-vk Not tainted 6.8.0-rc6+ #27 Hardware name: Gigabyte Technology Co., Ltd. Z390 I AORUS PRO WIFI/Z390 I AORUS PRO WIFI-CF, BIOS F8 11/05/2021 RIP: 0010:gp100_vmm_pgt_mem+0xe3/0x180 [nouveau] Code: c7 48 01 c8 49 89 45 58 85 d2 0f 84 95 00 00 00 41 0f b7 46 12 49 8b 7e 08 89 da 42 8d 2c f8 48 8b 47 08 41 83 c7 01 48 89 ee <48> 8b 40 08 ff d0 0f 1f 00 49 8b 7e 08 48 89 d9 48 8d 75 04 48 c1 RSP: 0000:ffffac20c5857838 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00000000004d8001 RCX: 0000000000000001 RDX: 00000000004d8001 RSI: 00000000000006d8 RDI: ffffa07afe332180 RBP: 00000000000006d8 R08: ffffac20c5857ad0 R09: 0000000000ffff10 R10: 0000000000000001 R11: ffffa07af27e2de0 R12: 000000000000001c R13: ffffac20c5857ad0 R14: ffffa07a96fe9040 R15: 000000000000001c FS: 00007fe395eed7c0(0000) GS:ffffa07e2c980000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 000000011febe001 CR4: 00000000003706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ... ? gp100_vmm_pgt_mem+0xe3/0x180 [nouveau] ? gp100_vmm_pgt_mem+0x37/0x180 [nouveau] nvkm_vmm_iter+0x351/0xa20 [nouveau] ? __pfx_nvkm_vmm_ref_ptes+0x10/0x10 [nouveau] ? • https://git.kernel.org/stable/c/be55287aa5ba6895e9d4d3ed2f08a1be7a065957 https://git.kernel.org/stable/c/bba8ec5e9b16649d85bc9e9086bf7ae5b5716ff9 https://git.kernel.org/stable/c/1bc4825d4c3ec6abe43cf06c3c39d664d044cbf7 https://git.kernel.org/stable/c/13d76b2f443dc371842916dd8768009ff1594716 https://git.kernel.org/stable/c/3ab056814cd8ab84744c9a19ef51360b2271c572 https://git.kernel.org/stable/c/ad74d208f213c06d860916ad40f609ade8c13039 https://git.kernel.org/stable/c/a019b44b1bc6ed224c46fb5f88a8a10dd116e525 https://git.kernel.org/stable/c/21ca9539f09360fd83654f78f2c361f2f • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-476: NULL Pointer Dereference •