Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2022-50630— mm: hugetlb: fix UAF in hugetlb_handle_userfault

EPSS 0.02% · P6
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2022-50630

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
mm: hugetlb: fix UAF in hugetlb_handle_userfault
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mm: hugetlb: fix UAF in hugetlb_handle_userfault The vma_lock and hugetlb_fault_mutex are dropped before handling userfault and reacquire them again after handle_userfault(), but reacquire the vma_lock could lead to UAF[1,2] due to the following race, hugetlb_fault hugetlb_no_page /*unlock vma_lock */ hugetlb_handle_userfault handle_userfault /* unlock mm->mmap_lock*/ vm_mmap_pgoff do_mmap mmap_region munmap_vma_range /* clean old vma */ /* lock vma_lock again <--- UAF */ /* unlock vma_lock */ Since the vma_lock will unlock immediately after hugetlb_handle_userfault(), let's drop the unneeded lock and unlock in hugetlb_handle_userfault() to fix the issue. [1] https://lore.kernel.org/linux-mm/000000000000d5e00a05e834962e@google.com/ [2] https://lore.kernel.org/linux-mm/20220921014457.1668-1-liuzixian4@huawei.com/
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hugetlb_handle_userfault错误处理vma_lock，可能导致UAF问题。
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 1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45 ~ 45c33966759ea1b4040c08dacda99ef623c0ca29 -
LinuxLinux 4.11 -

II. Public POCs for CVE-2022-50630

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2022-50630

请登录查看更多情报信息。

Same Patch Batch · Linux · 2025-12-08 · 82 CVEs total

CVE-2022-50629wifi: rsi: Fix memory leak in rsi_coex_attach()
CVE-2023-53752net: deal with integer overflows in kmalloc_reserve()
CVE-2022-50626media: dvb-usb: fix memory leak in dvb_usb_adapter_init()
CVE-2022-50627wifi: ath11k: fix monitor mode bringup crash
CVE-2022-50625serial: amba-pl011: avoid SBSA UART accessing DMACR register
CVE-2022-50622ext4: fix potential memory leak in ext4_fc_record_modified_inode()
CVE-2022-50621dm: verity-loadpin: Only trust verity targets with enforcement
CVE-2022-50620f2fs: fix to invalidate dcc->f2fs_issue_discard in error path
CVE-2022-50619drm/amdkfd: Fix memory leak in kfd_mem_dmamap_userptr()
CVE-2022-50623fpga: prevent integer overflow in dfl_feature_ioctl_set_irq()
CVE-2022-50628drm/gud: Fix UBSAN warning
CVE-2023-53742kcsan: Avoid READ_ONCE() in read_instrumented_memory()
CVE-2023-53743PCI: Free released resource after coalescing
CVE-2023-53744soc: ti: pm33xx: Fix refcount leak in am33xx_pm_probe
CVE-2023-53745um: vector: Fix memory leak in vector_config
CVE-2023-53746s390/vfio-ap: fix memory leak in vfio_ap device driver
CVE-2023-53747vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF
CVE-2023-53748media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup
CVE-2023-53750pinctrl: freescale: Fix a memory out of bounds when num_configs is 1
CVE-2023-53751cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname

Showing top 20 of 82 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50630

No comments yet

Leave a comment