CVE-2024-27022

Advisory lineage Upstream: 0 Downstream: 14
Modified
Published: 01 May 2024, 05:35
Last modified:11 May 2026, 20:08

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 May 2024, 05:35
Published
Vulnerability first disclosed
11 May 2026, 20:08
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 1%

Techniques & Countermeasures

  • CWE-908•Use of Uninitialized Resource

    The product uses or accesses a resource that has not been initialized.

Affected Systems

  • linux•linux

    ≥ 8d9bfb2608145cf3e408428c224099e1585471af, < 2e5cbab8ccbfc7d4a3d8a21d3c2a1f2c1aa29b5b | ≥ 8d9bfb2608145cf3e408428c224099e1585471af, < abdb88dd272bbeb93efe01d8e0b7b17e24af3a34 | ≥ 8d9bfb2608145cf3e408428c224099e1585471af, < 35e351780fa9d8240dd6f7e4f245f9ea37e96c19 | 6.1

  • linux•linux_kernel

    ≥ 6.1, < 6.1.90 | ≥ 6.2, < 6.6.30 | ≥ 6.7, < 6.8.8 | 6.9:rc1 | 6.9:rc2 | 6.9:rc3 | 6.9:rc4

References (10)