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CVE-2024-46838— userfaultfd: don't BUG_ON() if khugepaged yanks our page table

EPSS 0.05% · P15
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I. Basic Information for CVE-2024-46838

Vulnerability Information
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Vulnerability Title
userfaultfd: don't BUG_ON() if khugepaged yanks our page table
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: don't BUG_ON() if khugepaged yanks our page table Since khugepaged was changed to allow retracting page tables in file mappings without holding the mmap lock, these BUG_ON()s are wrong - get rid of them. We could also remove the preceding "if (unlikely(...))" block, but then we could reach pte_offset_map_lock() with transhuge pages not just for file mappings but also for anonymous mappings - which would probably be fine but I think is not necessarily expected.
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，该漏洞源于在处理khugepaged回收页面表时，错误地使用了BUG_ON。
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 1d65b771bc08cd054cf6d3766a72e113dc46d62f ~ 4a594acc12d5954cdc71d4450a386748bf3d136a -
LinuxLinux 6.6 -

II. Public POCs for CVE-2024-46838

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III. Intelligence Information for CVE-2024-46838

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

CVE-2024-46846spi: rockchip: Resolve unbalanced runtime PM / system PM handling
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-2024-46847mm: vmalloc: ensure vmap_block is initialised before adding to queue
CVE-2024-46853spi: nxp-fspi: fix the KASAN report out-of-bounds bug
CVE-2024-46844um: line: always fill *error_out in setup_one_line()
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-2024-46837drm/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

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