Use of Uninitialized Resource Affecting kernel-uki-virt package, versions <0:5.14.0-427.37.1.el9_4
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Test your applications- Snyk ID SNYK-ALMALINUX9-KERNELUKIVIRT-8324940
- published 4 Nov 2024
- disclosed 24 Sep 2024
Introduced: 24 Sep 2024
CVE-2024-27022 Open this link in a new tabHow to fix?
Upgrade AlmaLinux:9 kernel-uki-virt to version 0:5.14.0-427.37.1.el9_4 or higher.
This issue was patched in ALSA-2024:6997.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-uki-virt package and not the kernel-uki-virt package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:9 relevant fixed versions and status.
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
- https://errata.almalinux.org/9/ALSA-2024-6997.html
- https://access.redhat.com/security/cve/CVE-2024-27022
- https://access.redhat.com/errata/RHSA-2024:6997
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/
- https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac
- https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557
- https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19
- https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34
- https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbf
- https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e