cbcvebase.
CVE-2024-36925
published 2024-05-30

CVE-2024-36925: In the Linux kernel, the following vulnerability has been resolved: swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y Using restricted DMA…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.5th percentile
In the Linux kernel, the following vulnerability has been resolved: swiotlb: initialise restricted pool list_head when SWIOTLB_DYNAMIC=y Using restricted DMA pools (CONFIG_DMA_RESTRICTED_POOL=y) in conjunction with dynamic SWIOTLB (CONFIG_SWIOTLB_DYNAMIC=y) leads to the following crash when initialising the restricted pools at boot-time: | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 | Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP | pc : rmem_swiotlb_device_init+0xfc/0x1ec | lr : rmem_swiotlb_device_init+0xf0/0x1ec | Call trace: | rmem_swiotlb_device_init+0xfc/0x1ec | of_reserved_mem_device_init_by_idx+0x18c/0x238 | of_dma_configure_id+0x31c/0x33c | platform_dma_configure+0x34/0x80 faddr2line reveals that the crash is in the list validation code: include/linux/list.h:83 include/linux/rculist.h:79 include/linux/rculist.h:106 kernel/dma/swiotlb.c:306 kernel/dma/swiotlb.c:1695 because add_mem_pool() is trying to list_add_rcu() to a NULL 'mem->pools'. Fix the crash by initialising the 'mem->pools' list_head in rmem_swiotlb_device_init() before calling add_mem_pool().

Affected

12 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.8.11-1 (forky)linux 6.8.11-1 (forky)
linuxlinux
linuxlinux>= 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb < f2a6b3ed20f2dea4cb645abc6a73c4595662adcaf2a6b3ed20f2dea4cb645abc6a73c4595662adca
linuxlinux>= 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb < f62e0fefcdfe2c05ccb1aa80521a69524eea9c84f62e0fefcdfe2c05ccb1aa80521a69524eea9c84
linuxlinux>= 1aaa736815eb04f4dae3f0b3e977b2a0677a4cfb < 75961ffb5cb3e5196f19cae7683f35cc88b5080075961ffb5cb3e5196f19cae7683f35cc88b50800
linuxlinux_kernel>= 0 < 6.8.11-16.8.11-1
linuxlinux_kernel>= 0 < 6.8.11-16.8.11-1
linuxlinux_kernel>= 0 < 6.8.0-40.406.8.0-40.40
linuxlinux_kernel>= 6.6 < 6.6.316.6.31
linuxlinux_kernel>= 6.7 < 6.8.106.8.10
msrcazl3_kernel_6.6.29.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.35.1-4_on_azure_linux_3.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_ubuntu6.5MEDIUM
vendor_debian5.5LOW
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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