mm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison

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Summary

CVECVE-2026-53207
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:38 UTC
Updated2026-07-02 20:55:07 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison Two concurrent madvise(MADV_HWPOISON) calls on the same hugetlb page can trigger a recursive spinlock self-deadlock (AA deadlock) on hugetlb_lock when racing with a concurrent unmap: thread#0 thread#1 -------- -------- madvise(folio, MADV_HWPOISON) -> poisons the folio successfully madvise(folio, MADV_HWPOISON) unmap(folio) try_memory_failure_hugetlb get_huge_page_for_hwpoison spin_lock_irq(&hugetlb_lock) <- held __get_huge_page_for_hwpoison hugetlb_update_hwpoison() -> MF_HUGETLB_FOLIO_PRE_POISONED goto out: folio_put() refcount: 1 -> 0 free_huge_folio() spin_lock_irqsave(&hugetlb_lock) -> AA DEADLOCK! The out: path in __get_huge_page_for_hwpoison() calls folio_put() to drop the GUP reference while the hugetlb_lock is still held by the hugetlb.c wrapper get_huge_page_for_hwpoison(). If concurrent unmap has released the page table mapping reference, folio_put() drops the folio refcount to zero, triggering free_huge_folio() which attempts to re-acquire the non-recursive hugetlb_lock. Fix this by moving hugetlb_lock acquisition from the hugetlb.c wrapper into get_huge_page_for_hwpoison(). Place spin_unlock_irq() before the folio_put() at the out: label so the folio is always released outside the lock. [[email protected]: fix race, rename label per Miaohe]

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000990000 probability, percentile 0.010020000 (date 2026-07-04)

Problem Types: CWE-667

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 405ce051236cc65b30bbfe490b28ce60ae6aed85 fc3ff42cb0cbf947e4600ae9761c3783760050e2 git Not specified
CNA Linux Linux affected 405ce051236cc65b30bbfe490b28ce60ae6aed85 77b73b54801ae7137479c141fd0473a491c1dc48 git Not specified
CNA Linux Linux affected 405ce051236cc65b30bbfe490b28ce60ae6aed85 a33bfed648c10f5a1519981dbfad80841191edc8 git Not specified
CNA Linux Linux affected 405ce051236cc65b30bbfe490b28ce60ae6aed85 dd77a83915b07e2b0205adb284f08b39ae31dc4b git Not specified
CNA Linux Linux affected 405ce051236cc65b30bbfe490b28ce60ae6aed85 bf7ba8f96c258c30393814491930ae4ecdc5fe5e git Not specified
CNA Linux Linux affected 405ce051236cc65b30bbfe490b28ce60ae6aed85 3c2d42b8ee345b17a4ba56b0f6492d1ff4c1178e git Not specified
CNA Linux Linux affected 62d1655b922958826b7ec22682c3141746f75064 git Not specified
CNA Linux Linux affected 5.15.54 5.16 semver Not specified
CNA Linux Linux affected 5.18 Not specified
CNA Linux Linux unaffected 5.18 semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.94 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fc3ff42cb0cbf947e4600ae9761c3783760050e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dd77a83915b07e2b0205adb284f08b39ae31dc4b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3c2d42b8ee345b17a4ba56b0f6492d1ff4c1178e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a33bfed648c10f5a1519981dbfad80841191edc8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bf7ba8f96c258c30393814491930ae4ecdc5fe5e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/77b73b54801ae7137479c141fd0473a491c1dc48 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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