CVSS: 5.3EPSS: 0%CPEs: 5EXPL: 0CVE-2024-35857 – icmp: prevent possible NULL dereferences from icmp_build_probe()
https://notcve.org/view.php?id=CVE-2024-35857
In the Linux kernel, the following vulnerability has been resolved: icmp: prevent possible NULL dereferences from icmp_build_probe() First problem is a double call to __in_dev_get_rcu(), because the second one could return NULL. if (__in_dev_get_rcu(dev) && __in_dev_get_rcu(dev)->ifa_list) Second problem is a read from dev->ip6_ptr with no NULL check: if (!list_empty(&rcu_dereference(dev->ip6_ptr)->addr_list)) Use the correct RCU API to fix these. v2: add missing include <net/addrconf.h> En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: icmp: evita posibles desreferencias a NULL por parte de icmp_build_probe(). El primer problema es una doble llamada a __in_dev_get_rcu(), porque la segunda podría devolver NULL. if (__in_dev_get_rcu(dev) && __in_dev_get_rcu(dev)->ifa_list) El segundo problema es una lectura de dev->ip6_ptr sin verificación NULL: if (!list_empty(&rcu_dereference(dev->ip6_ptr)->addr_list)) Use el correcto API de RCU para solucionarlos. v2: agregar falta incluir A flaw was found in the Linux kernel's ICMP protocol. Under some conditions, a NULL pointer dereference can be triggered due to a missing check, causing a system crash and resulting in a denial of service. • https://git.kernel.org/stable/c/d329ea5bd8845f0b196bf41b18b6173340d6e0e4 https://git.kernel.org/stable/c/23b7ee4a8d559bf38eac7ce5bb2f6ebf76f9c401 https://git.kernel.org/stable/c/599c9ad5e1d43f5c12d869f5fd406ba5d8c55270 https://git.kernel.org/stable/c/d68dc711d84fdcf698e5d45308c3ddeede586350 https://git.kernel.org/stable/c/3e2979bf080c40da4f7c93aff8575ab8bc62b767 https://git.kernel.org/stable/c/c58e88d49097bd12dfcfef4f075b43f5d5830941 https://access.redhat.com/security/cve/CVE-2024-35857 https://bugzilla.redhat.com/show_bug.cgi?id=2281247 • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2024-35855 – mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update
https://notcve.org/view.php?id=CVE-2024-35855
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update The rule activity update delayed work periodically traverses the list of configured rules and queries their activity from the device. As part of this task it accesses the entry pointed by 'ventry->entry', but this entry can be changed concurrently by the rehash delayed work, leading to a use-after-free [1]. Fix by closing the race and perform the activity query under the 'vregion->lock' mutex. [1] BUG: KASAN: slab-use-after-free in mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140 Read of size 8 at addr ffff8881054ed808 by task kworker/0:18/181 CPU: 0 PID: 181 Comm: kworker/0:18 Not tainted 6.9.0-rc2-custom-00781-gd5ab772d32f7 #2 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_rule_activity_update_work Call Trace: <TASK> dump_stack_lvl+0xc6/0x120 print_report+0xce/0x670 kasan_report+0xd7/0x110 mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140 mlxsw_sp_acl_rule_activity_update_work+0x219/0x400 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 1039: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x8f/0xa0 __kmalloc+0x19c/0x360 mlxsw_sp_acl_tcam_entry_create+0x7b/0x1f0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x30d/0xb50 mlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 Freed by task 1039: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 poison_slab_object+0x102/0x170 __kasan_slab_free+0x14/0x30 kfree+0xc1/0x290 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x3d7/0xb50 mlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mlxsw: spectrum_acl_tcam: corrige posible use after free durante la actualización de la actividad. El trabajo retrasado de la actualización de la actividad de la regla recorre periódicamente la lista de reglas configuradas y consulta su actividad desde el dispositivo. Como parte de esta tarea, accede a la entrada señalada por 'ventry->entry', pero esta entrada puede cambiarse simultáneamente mediante el trabajo retrasado del rehash, lo que lleva a un use after free [1]. Para solucionarlo, cierre la ejecución y realice la consulta de actividad en el mutex 'vregion->lock'. [1] ERROR: KASAN: slab-use-after-free en mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140 Lectura del tamaño 8 en la dirección ffff8881054ed808 por tarea kworker/0:18/181 CPU: 0 PID: 181 Comm: kworker/0:18 Not tainted 6.9.0-rc2-custom-00781-gd5ab772d32f7 #2 Nombre del hardware: Mellanox Technologies Ltd. • https://git.kernel.org/stable/c/2bffc5322fd8679e879cd6370881ee50cf141ada https://git.kernel.org/stable/c/1b73f6e4ea770410a937a8db98f77e52594d23a0 https://git.kernel.org/stable/c/e24d2487424779c02760ff50cd9021b8676e19ef https://git.kernel.org/stable/c/c17976b42d546ee118ca300db559630ee96fb758 https://git.kernel.org/stable/c/b996e8699da810e4c915841d6aaef761007f933a https://git.kernel.org/stable/c/feabdac2057e863d0e140a2adf3d232eb4882db4 https://git.kernel.org/stable/c/b183b915beef818a25e3154d719ca015a1ae0770 https://git.kernel.org/stable/c/79b5b4b18bc85b19d3a518483f9abbbe6 •
CVSS: 8.8EPSS: 0%CPEs: 7EXPL: 0CVE-2024-35854 – mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash
https://notcve.org/view.php?id=CVE-2024-35854
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash The rehash delayed work migrates filters from one region to another according to the number of available credits. The migrated from region is destroyed at the end of the work if the number of credits is non-negative as the assumption is that this is indicative of migration being complete. This assumption is incorrect as a non-negative number of credits can also be the result of a failed migration. The destruction of a region that still has filters referencing it can result in a use-after-free [1]. Fix by not destroying the region if migration failed. [1] BUG: KASAN: slab-use-after-free in mlxsw_sp_acl_ctcam_region_entry_remove+0x21d/0x230 Read of size 8 at addr ffff8881735319e8 by task kworker/0:31/3858 CPU: 0 PID: 3858 Comm: kworker/0:31 Tainted: G W 6.9.0-rc2-custom-00782-gf2275c2157d8 #5 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work Call Trace: <TASK> dump_stack_lvl+0xc6/0x120 print_report+0xce/0x670 kasan_report+0xd7/0x110 mlxsw_sp_acl_ctcam_region_entry_remove+0x21d/0x230 mlxsw_sp_acl_ctcam_entry_del+0x2e/0x70 mlxsw_sp_acl_atcam_entry_del+0x81/0x210 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x3cd/0xb50 mlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 174: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x8f/0xa0 __kmalloc+0x19c/0x360 mlxsw_sp_acl_tcam_region_create+0xdf/0x9c0 mlxsw_sp_acl_tcam_vregion_rehash_work+0x954/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 Freed by task 7: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 poison_slab_object+0x102/0x170 __kasan_slab_free+0x14/0x30 kfree+0xc1/0x290 mlxsw_sp_acl_tcam_region_destroy+0x272/0x310 mlxsw_sp_acl_tcam_vregion_rehash_work+0x731/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: mlxsw: spectrum_acl_tcam: Corrige posible use after free durante el rehash El trabajo retrasado del rehash migra filtros de una región a otra según la cantidad de créditos disponibles. La región que ha migrado se destruye al final del trabajo si el número de créditos no es negativo, ya que se supone que esto es indicativo de que la migración se ha completado. Esta suposición es incorrecta ya que una cantidad no negativa de créditos también puede ser el resultado de una migración fallida. • https://git.kernel.org/stable/c/c9c9af91f1d9a636aecc55302c792538e549a430 https://git.kernel.org/stable/c/e118e7ea24d1392878ef85926627c6bc640c4388 https://git.kernel.org/stable/c/a429a912d6c779807f4d72a6cc0a1efaaa3613e1 https://git.kernel.org/stable/c/4c89642ca47fb620914780c7c51d8d1248201121 https://git.kernel.org/stable/c/813e2ab753a8f8c243a39ede20c2e0adc15f3887 https://git.kernel.org/stable/c/311eeaa7b9e26aba5b3d57b09859f07d8e9fc049 https://git.kernel.org/stable/c/a02687044e124f8ccb427cd3632124a4e1a7d7c1 https://git.kernel.org/stable/c/54225988889931467a9b55fdbef534079 • CWE-416: Use After Free •
CVSS: 6.4EPSS: 0%CPEs: 7EXPL: 0CVE-2024-35853 – mlxsw: spectrum_acl_tcam: Fix memory leak during rehash
https://notcve.org/view.php?id=CVE-2024-35853
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix memory leak during rehash The rehash delayed work migrates filters from one region to another. This is done by iterating over all chunks (all the filters with the same priority) in the region and in each chunk iterating over all the filters. If the migration fails, the code tries to migrate the filters back to the old region. However, the rollback itself can also fail in which case another migration will be erroneously performed. Besides the fact that this ping pong is not a very good idea, it also creates a problem. Each virtual chunk references two chunks: The currently used one ('vchunk->chunk') and a backup ('vchunk->chunk2'). During migration the first holds the chunk we want to migrate filters to and the second holds the chunk we are migrating filters from. The code currently assumes - but does not verify - that the backup chunk does not exist (NULL) if the currently used chunk does not reference the target region. This assumption breaks when we are trying to rollback a rollback, resulting in the backup chunk being overwritten and leaked [1]. Fix by not rolling back a failed rollback and add a warning to avoid future cases. [1] WARNING: CPU: 5 PID: 1063 at lib/parman.c:291 parman_destroy+0x17/0x20 Modules linked in: CPU: 5 PID: 1063 Comm: kworker/5:11 Tainted: G W 6.9.0-rc2-custom-00784-gc6a05c468a0b #14 Hardware name: Mellanox Technologies Ltd. • https://git.kernel.org/stable/c/843500518509128a935edab96bd8efef7c54669e https://git.kernel.org/stable/c/c6f3fa7f5a748bf6e5c4eb742686d6952f854e76 https://git.kernel.org/stable/c/617e98ba4c50f4547c9eb0946b1cfc26937d70d1 https://git.kernel.org/stable/c/413a01886c3958d4b8aac23a3bff3d430b92093e https://git.kernel.org/stable/c/b822644fd90992ee362c5e0c8d2556efc8856c76 https://git.kernel.org/stable/c/0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cf https://git.kernel.org/stable/c/b3fd51f684a0711504f82de510da109ae639722d https://git.kernel.org/stable/c/8ca3f7a7b61393804c46f170743c3b839 • CWE-416: Use After Free •
CVSS: 5.5EPSS: 0%CPEs: 7EXPL: 0CVE-2024-35852 – mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work
https://notcve.org/view.php?id=CVE-2024-35852
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work The rehash delayed work is rescheduled with a delay if the number of credits at end of the work is not negative as supposedly it means that the migration ended. Otherwise, it is rescheduled immediately. After "mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash" the above is no longer accurate as a non-negative number of credits is no longer indicative of the migration being done. It can also happen if the work encountered an error in which case the migration will resume the next time the work is scheduled. The significance of the above is that it is possible for the work to be pending and associated with hints that were allocated when the migration started. This leads to the hints being leaked [1] when the work is canceled while pending as part of ACL region dismantle. Fix by freeing the hints if hints are associated with a work that was canceled while pending. Blame the original commit since the reliance on not having a pending work associated with hints is fragile. [1] unreferenced object 0xffff88810e7c3000 (size 256): comm "kworker/0:16", pid 176, jiffies 4295460353 hex dump (first 32 bytes): 00 30 95 11 81 88 ff ff 61 00 00 00 00 00 00 80 .0......a....... 00 00 61 00 40 00 00 00 00 00 00 00 04 00 00 00 ..a.@........... backtrace (crc 2544ddb9): [<00000000cf8cfab3>] kmalloc_trace+0x23f/0x2a0 [<000000004d9a1ad9>] objagg_hints_get+0x42/0x390 [<000000000b143cf3>] mlxsw_sp_acl_erp_rehash_hints_get+0xca/0x400 [<0000000059bdb60a>] mlxsw_sp_acl_tcam_vregion_rehash_work+0x868/0x1160 [<00000000e81fd734>] process_one_work+0x59c/0xf20 [<00000000ceee9e81>] worker_thread+0x799/0x12c0 [<00000000bda6fe39>] kthread+0x246/0x300 [<0000000070056d23>] ret_from_fork+0x34/0x70 [<00000000dea2b93e>] ret_from_fork_asm+0x1a/0x30 En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: mlxsw: espectro_acl_tcam: Corrige pérdida de memoria al cancelar trabajo de rehash El trabajo retrasado de rehash se reprograma con retraso si el número de créditos al final del trabajo no es negativo como supuestamente significa que la migración terminó. En caso contrario, se reprograma inmediatamente. • https://git.kernel.org/stable/c/c9c9af91f1d9a636aecc55302c792538e549a430 https://git.kernel.org/stable/c/51cefc9da400b953fee749c9e5d26cd4a2b5d758 https://git.kernel.org/stable/c/857ed800133ffcfcee28582090b63b0cbb8ba59d https://git.kernel.org/stable/c/63d814d93c5cce4c18284adc810028f28dca493f https://git.kernel.org/stable/c/5bfe7bf9656ed2633718388f12b7c38b86414a04 https://git.kernel.org/stable/c/de1aaefa75be9d0ec19c9a3e0e2f9696de20c6ab https://git.kernel.org/stable/c/d72dd6fcd7886d0523afbab8b4a4b22d17addd7d https://git.kernel.org/stable/c/fb4e2b70a7194b209fc7320bbf33b375f •