cbcvebase.
CVE-2024-45022
published 2024-09-11

CVE-2024-45022: In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.8th percentile
In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0 The __vmap_pages_range_noflush() assumes its argument pages** contains pages with the same page shift. However, since commit e9c3cda4d86e ("mm, vmalloc: fix high order __GFP_NOFAIL allocations"), if gfp_flags includes __GFP_NOFAIL with high order in vm_area_alloc_pages() and page allocation failed for high order, the pages** may contain two different page shifts (high order and order-0). This could lead __vmap_pages_range_noflush() to perform incorrect mappings, potentially resulting in memory corruption. Users might encounter this as follows (vmap_allow_huge = true, 2M is for PMD_SIZE): kvmalloc(2M, __GFP_NOFAIL|GFP_X) __vmalloc_node_range_noprof(vm_flags=VM_ALLOW_HUGE_VMAP) vm_area_alloc_pages(order=9) ---> order-9 allocation failed and fallback to order-0 vmap_pages_range() vmap_pages_range_noflush() __vmap_pages_range_noflush(page_shift = 21) ----> wrong mapping happens We can remove the fallback code because if a high-order allocation fails, __vmalloc_node_range_noprof() will retry with order-0. Therefore, it is unnecessary to fallback to order-0 here. Therefore, fix this by removing the fallback code.

Affected

22 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
debianlinux-6.1< linux 6.1.112-1 (bookworm)linux 6.1.112-1 (bookworm)
linuxlinux
linuxlinux>= 6.1.95 < 6.1.1076.1.107
linuxlinux>= e9c3cda4d86e56bf7fe403729f38c4f0f65d3860 < de7bad86345c43cd040ed43e20d9fad78a3ee59fde7bad86345c43cd040ed43e20d9fad78a3ee59f
linuxlinux>= e9c3cda4d86e56bf7fe403729f38c4f0f65d3860 < c91618816f4d21fc574d7577a37722adcd4075b2c91618816f4d21fc574d7577a37722adcd4075b2
linuxlinux>= e9c3cda4d86e56bf7fe403729f38c4f0f65d3860 < 61ebe5a747da649057c37be1c37eb934b4af79ca61ebe5a747da649057c37be1c37eb934b4af79ca
linuxlinux>= fe5c2bdcb14c8612eb5e7a09159801c7219e9ac4 < fd1ffbb50ef4da5e1378a46616b6d7407dc795dafd1ffbb50ef4da5e1378a46616b6d7407dc795da
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.112-16.1.112-1
linuxlinux_kernel>= 0 < 6.10.7-16.10.7-1
linuxlinux_kernel>= 0 < 6.10.7-16.10.7-1
linuxlinux_kernel>= 0 < 6.8.0-50.516.8.0-50.51
linuxlinux_kernel>= 6.1.95 < 6.1.1076.1.107
linuxlinux_kernel>= 6.3 < 6.6.486.6.48
linuxlinux_kernel>= 6.7 < 6.10.76.10.7
msrcazl3_kernel_6.6.47.1-1_on_azure_linux_3.0
msrcazl3_kernel_6.6.51.1-1_on_azure_linux_3.0
msrcazure_linux_3.0_arm
msrcazure_linux_3.0_x64

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
vendor_ubuntu5.5MEDIUM
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