CVE-2026-23097

Advisory lineage Upstream: 0 Downstream: 43
Analyzed
Published: 04 Feb 2026, 16:08
Last modified:23 May 2026, 16:03

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Feb 2026, 16:08
Published
Vulnerability first disclosed
23 May 2026, 16:03
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Affected Systems

  • linux•linux

    ≥ 336bf30eb76580b579dc711ded5d599d905c0217, < e7396d23f9d5739f56cf9ab430c3a169f5508394 | ≥ 336bf30eb76580b579dc711ded5d599d905c0217, < ad97b9a55246eb940a26ac977f80892a395cabf9 | ≥ 336bf30eb76580b579dc711ded5d599d905c0217, < 5edb9854f8df5428b40990a1c7d60507da5bd330 | ≥ 336bf30eb76580b579dc711ded5d599d905c0217, < 526394af4e8ade89cacd1a9ce2b97712712fcc34 | ≥ 336bf30eb76580b579dc711ded5d599d905c0217, < b75070823b89009f5123fd0e05a8e0c3d39937c1 | ≥ 336bf30eb76580b579dc711ded5d599d905c0217, < 1b68efce6dd483d22f50d0d3800c4cfda14b1305 | ≥ 336bf30eb76580b579dc711ded5d599d905c0217, < b7880cb166ab62c2409046b2347261abf701530e | ef792d6ce0db6a56e56743b1de1716a982c3b851 | ≥ 5.9.9, < 5.10 | 5.10

  • linux•linux_kernel

    ≥ 5.9.9, < 5.10 | ≥ 5.10.1, < 5.10.249 | ≥ 5.11, < 5.15.199 | ≥ 5.16, < 6.1.162 | ≥ 6.2, < 6.6.122 | ≥ 6.7, < 6.12.68 | ≥ 6.13, < 6.18.8 | 5.10 | 5.10:rc4 | 5.10:rc5 | 5.10:rc6 | 5.10:rc7 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6

References (7)