CVE-2026-23097 Affecting kernel-debug-devel-matched package, versions <0:5.14.0-611.36.1.el9_7


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.03% (9th percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELDEBUGDEVELMATCHED-15368113
  • published3 Mar 2026
  • disclosed4 Feb 2026

Introduced: 4 Feb 2026

NewCVE-2026-23097  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-debug-devel-matched to version 0:5.14.0-611.36.1.el9_7 or higher.
This issue was patched in ELSA-2026-3488.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel-matched package and not the kernel-debug-devel-matched package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

migrate: correct lock ordering for hugetlb file folios

Syzbot has found a deadlock (analyzed by Lance Yang):

  1. Task (5749): Holds folio_lock, then tries to acquire i_mmap_rwsem(read lock).
  2. Task (5754): Holds i_mmap_rwsem(write lock), then tries to acquire folio_lock.

migrate_pages() -> migrate_hugetlbs() -> unmap_and_move_huge_page() <- Takes folio_lock! -> remove_migration_ptes() -> __rmap_walk_file() -> i_mmap_lock_read() <- Waits for i_mmap_rwsem(read lock)!

hugetlbfs_fallocate() -> hugetlbfs_punch_hole() <- Takes i_mmap_rwsem(write lock)! -> hugetlbfs_zero_partial_page() -> filemap_lock_hugetlb_folio() -> filemap_lock_folio() -> __filemap_get_folio <- Waits for folio_lock!

The migration path is the one taking locks in the wrong order according to the documentation at the top of mm/rmap.c. So expand the scope of the existing i_mmap_lock to cover the calls to remove_migration_ptes() too.

This is (mostly) how it used to be after commit c0d0381ade79. That was removed by 336bf30eb765 for both file & anon hugetlb pages when it should only have been removed for anon hugetlb pages.

CVSS Base Scores

version 3.1