Bug 2373639 (CVE-2022-49991)

Summary: CVE-2022-49991 kernel: mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, rhel-process-autobot, vkumar, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-06-18 12:11:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mm/hugetlb: avoid corrupting page->mapping in hugetlb_mcopy_atomic_pte

In MCOPY_ATOMIC_CONTINUE case with a non-shared VMA, pages in the page
cache are installed in the ptes.  But hugepage_add_new_anon_rmap is called
for them mistakenly because they're not vm_shared.  This will corrupt the
page->mapping used by page cache code.
Comment 1 Avinash Hanwate 2025-06-18 23:34:10 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061824-CVE-2022-49991-c44f@gregkh/T
Comment 6 errata-xmlrpc 2025-08-27 11:39:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:14744 https://access.redhat.com/errata/RHSA-2025:14744
Comment 7 errata-xmlrpc 2025-08-27 13:19:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2025:14749 https://access.redhat.com/errata/RHSA-2025:14749