CVE - CVE-2024-27022

CVE-ID
CVE-2024-27022	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: fork: defer linking file vma until vma is fully initialized Thorvald reported a WARNING [1]. And the root cause is below race: CPU 1 CPU 2 fork hugetlbfs_fallocate dup_mmap hugetlbfs_punch_hole i_mmap_lock_write(mapping); vma_interval_tree_insert_after -- Child vma is visible through i_mmap tree. i_mmap_unlock_write(mapping); hugetlb_dup_vma_private -- Clear vma_lock outside i_mmap_rwsem! i_mmap_lock_write(mapping); hugetlb_vmdelete_list vma_interval_tree_foreach hugetlb_vma_trylock_write -- Vma_lock is cleared. tmp->vm_ops->open -- Alloc new vma_lock outside i_mmap_rwsem! hugetlb_vma_unlock_write -- Vma_lock is assigned!!! i_mmap_unlock_write(mapping); hugetlb_dup_vma_private() and hugetlb_vm_op_open() are called outside i_mmap_rwsem lock while vma lock can be used in the same time. Fix this by deferring linking file vma until vma is fully initialized. Those vmas should be initialized first before they can be used.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac URL:https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac MISC:https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557 URL:https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557 MISC:https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19 URL:https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19 MISC:https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34 URL:https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34 MISC:https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbf URL:https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbf MISC:https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e URL:https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)