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CVE-2024-46847— mm: vmalloc: ensure vmap_block is initialised before adding to queue

EPSS 0.03% · P10
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I. Basic Information for CVE-2024-46847

Vulnerability Information
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Vulnerability Title
mm: vmalloc: ensure vmap_block is initialised before adding to queue
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm: vmalloc: ensure vmap_block is initialised before adding to queue Commit 8c61291fd850 ("mm: fix incorrect vbq reference in purge_fragmented_block") extended the 'vmap_block' structure to contain a 'cpu' field which is set at allocation time to the id of the initialising CPU. When a new 'vmap_block' is being instantiated by new_vmap_block(), the partially initialised structure is added to the local 'vmap_block_queue' xarray before the 'cpu' field has been initialised. If another CPU is concurrently walking the xarray (e.g. via vm_unmap_aliases()), then it may perform an out-of-bounds access to the remote queue thanks to an uninitialised index. This has been observed as UBSAN errors in Android: | Internal error: UBSAN: array index out of bounds: 00000000f2005512 [#1] PREEMPT SMP | | Call trace: | purge_fragmented_block+0x204/0x21c | _vm_unmap_aliases+0x170/0x378 | vm_unmap_aliases+0x1c/0x28 | change_memory_common+0x1dc/0x26c | set_memory_ro+0x18/0x24 | module_enable_ro+0x98/0x238 | do_init_module+0x1b0/0x310 Move the initialisation of 'vb->cpu' in new_vmap_block() ahead of the addition to the xarray.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在添加vmap_block到队列前，未确保其已初始化。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 88e0ad40d08a73a74c597e69f4cd2d1fba3838b5 ~ 1b2770e27d6d952f491bb362b657e5b2713c3efd -
LinuxLinux 6.10 -

II. Public POCs for CVE-2024-46847

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III. Intelligence Information for CVE-2024-46847

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Same Patch Batch · Linux · 2024-09-27 · 66 CVEs total

CVE-2024-46844um: line: always fill *error_out in setup_one_line()
CVE-2024-46865fou: fix initialization of grc
CVE-2024-46864x86/hyperv: fix kexec crash due to VP assist page corruption
CVE-2024-46863ASoC: Intel: soc-acpi-intel-lnl-match: add missing empty item
CVE-2024-46851drm/amd/display: Avoid race between dcn10_set_drr() and dc_state_destruct()
CVE-2024-46852dma-buf: heaps: Fix off-by-one in CMA heap fault handler
CVE-2024-46850drm/amd/display: Avoid race between dcn35_set_drr() and dc_state_destruct()
CVE-2024-46849ASoC: meson: axg-card: fix 'use-after-free'
CVE-2024-46848perf/x86/intel: Limit the period on Haswell
CVE-2024-46846spi: rockchip: Resolve unbalanced runtime PM / system PM handling
CVE-2024-46853spi: nxp-fspi: fix the KASAN report out-of-bounds bug
CVE-2024-46845tracing/timerlat: Only clear timer if a kthread exists
CVE-2024-46843scsi: ufs: core: Remove SCSI host only if added
CVE-2024-46841btrfs: don't BUG_ON on ENOMEM from btrfs_lookup_extent_info() in walk_down_proc()
CVE-2024-46842scsi: lpfc: Handle mailbox timeouts in lpfc_get_sfp_info
CVE-2024-46840btrfs: clean up our handling of refs == 0 in snapshot delete
CVE-2024-46838userfaultfd: don't BUG_ON() if khugepaged yanks our page table
CVE-2024-46837drm/panthor: Restrict high priorities on group_create
CVE-2024-46835drm/amdgpu: Fix smatch static checker warning
CVE-2024-46836usb: gadget: aspeed_udc: validate endpoint index for ast udc

Showing top 20 of 66 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46847

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