CVE-2026-23097migrate: correct lock ordering for hugetlb file folios
- 5.5MediumCVSS base score
- 0.11%Exploitation in 30 daysEPSS · top 99% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 22 days later
· 22 days later
Published
- 9 months later
· 9 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.11% · top 99% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 336bf30eb76580b579dc711ded5d599d905c0217 – < e7396d23f9d5739f56cf9ab430c3a169f5508394
- affected 336bf30eb76580b579dc711ded5d599d905c0217 – < ad97b9a55246eb940a26ac977f80892a395cabf9
- affected 336bf30eb76580b579dc711ded5d599d905c0217 – < 5edb9854f8df5428b40990a1c7d60507da5bd330
- affected 336bf30eb76580b579dc711ded5d599d905c0217 – < 526394af4e8ade89cacd1a9ce2b97712712fcc34
- affected 336bf30eb76580b579dc711ded5d599d905c0217 – < b75070823b89009f5123fd0e05a8e0c3d39937c1
- affected 336bf30eb76580b579dc711ded5d599d905c0217 – < 1b68efce6dd483d22f50d0d3800c4cfda14b1305
- affected 336bf30eb76580b579dc711ded5d599d905c0217 – < b7880cb166ab62c2409046b2347261abf701530e
- affected ef792d6ce0db6a56e56743b1de1716a982c3b851
- affected 5.9.9 – < 5.10
- affected 5.10
- unaffected < 5.10
- unaffected 5.10.249 – ≤ 5.10.*
- unaffected 5.15.199 – ≤ 5.15.*
- unaffected 6.1.162 – ≤ 6.1.*
- unaffected 6.6.122 – ≤ 6.6.*
- unaffected 6.12.68 – ≤ 6.12.*
- unaffected 6.18.8 – ≤ 6.18.*
- unaffected 6.19 – ≤ *
References
References7
- https://git.kernel.org/stable/c/e7396d23f9d5739f56cf9ab430c3a169f5508394 (opens in a new tab)
- https://git.kernel.org/stable/c/ad97b9a55246eb940a26ac977f80892a395cabf9 (opens in a new tab)
- https://git.kernel.org/stable/c/5edb9854f8df5428b40990a1c7d60507da5bd330 (opens in a new tab)
- https://git.kernel.org/stable/c/526394af4e8ade89cacd1a9ce2b97712712fcc34 (opens in a new tab)
- https://git.kernel.org/stable/c/b75070823b89009f5123fd0e05a8e0c3d39937c1 (opens in a new tab)
- https://git.kernel.org/stable/c/1b68efce6dd483d22f50d0d3800c4cfda14b1305 (opens in a new tab)
- https://git.kernel.org/stable/c/b7880cb166ab62c2409046b2347261abf701530e (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-5445 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-23097)Record last updated .