cbcvebase.
CVE-2024-35853
published 2024-05-17

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…

PriorityP434medium6.4CVSS 3.1
AVNACHPRLUINSUCLILAH
EPSS
0.73%
50.6th percentile
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. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP: 0010:parman_destroy+0x17/0x20 [...] Call Trace: mlxsw_sp_acl_atcam_region_fini+0x19/0x60 mlxsw_sp_acl_tcam_region_destroy+0x49/0xf0 mlxsw_sp_acl_tcam_vregion_rehash_work+0x1f1/0x470 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 ret_from_fork_asm+0x1a/0x30

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.90-1 (bookworm)linux 6.1.90-1 (bookworm)
linuxlinux
linuxlinux>= 843500518509128a935edab96bd8efef7c54669e < c6f3fa7f5a748bf6e5c4eb742686d6952f854e76c6f3fa7f5a748bf6e5c4eb742686d6952f854e76
linuxlinux>= 843500518509128a935edab96bd8efef7c54669e < 617e98ba4c50f4547c9eb0946b1cfc26937d70d1617e98ba4c50f4547c9eb0946b1cfc26937d70d1
linuxlinux>= 843500518509128a935edab96bd8efef7c54669e < 413a01886c3958d4b8aac23a3bff3d430b92093e413a01886c3958d4b8aac23a3bff3d430b92093e
linuxlinux>= 843500518509128a935edab96bd8efef7c54669e < b822644fd90992ee362c5e0c8d2556efc8856c76b822644fd90992ee362c5e0c8d2556efc8856c76
linuxlinux>= 843500518509128a935edab96bd8efef7c54669e < 0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cf0ae8ff7b6d42e33943af462910bdcfa2ec0cb8cf
linuxlinux>= 843500518509128a935edab96bd8efef7c54669e < b3fd51f684a0711504f82de510da109ae639722db3fd51f684a0711504f82de510da109ae639722d
linuxlinux>= 843500518509128a935edab96bd8efef7c54669e < 8ca3f7a7b61393804c46f170743c3b839df139778ca3f7a7b61393804c46f170743c3b839df13977
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.90-16.1.90-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 6.8.9-16.8.9-1
linuxlinux_kernel>= 0 < 5.4.0-189.2095.4.0-189.209
linuxlinux_kernel>= 0 < 5.15.0-116.1265.15.0-116.126
linuxlinux_kernel>= 0 < 6.8.0-40.406.8.0-40.40
linuxlinux_kernel>= 5.1 < 5.4.2755.4.275
linuxlinux_kernel>= 5.11 < 5.15.1585.15.158
linuxlinux_kernel>= 5.16 < 6.1.906.1.90
linuxlinux_kernel>= 5.5 < 5.10.2165.10.216
linuxlinux_kernel>= 6.2 < 6.6.306.6.30
linuxlinux_kernel>= 6.7 < 6.8.96.8.9
msrcazl3_hyperv-daemons_6.6.29.1-1_on_azure_linux_3.0

CVSS provenance

nvdv3.16.4MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
osv7.0HIGH
vendor_ubuntu7.0HIGH
vendor_debian6.4MEDIUM
vendor_msrc6.4MEDIUM
vendor_redhat6.4MEDIUM
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