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CVE-2026-31575

In the Linux kernel, the following vulnerability has been resolved: mm/userfaultfd: fix hugetlb fault mutex hash calculation In mfill_atomic_hugetlb(), linear_page_index() is used to calculate the page index for hugetlb_fault_mutex_hash(). However, linear_page_index() returns the index in PAGE_SIZE units, while hugetlb_fault_mutex_hash() expects the index in huge page units. This mismatch means that different addresses within the same huge page can produce different hash values, leading to t
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1babeeb879daee309f734785ab2bc2ab9597473320fe86f48b68b8f78b13fd66
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/hugetlb.h","mm/userfaultfd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5a525c43baaba0bf3063f86996ca3623b71e4172","status":"affected","version":"a08c7193e4f18dc8508f2d07d0de2c5b94cb39a3","versionType":"git"},{"lessThan":"574501ede47ac439afd67ba9812bc66722d500ba","status":"affected","version":"a08c7193e4f18dc8508f2d07d0de2c5b94cb39a3","versionType":"git"},{"lessThan":"08282b1bf74c69fc8ecd25493e7fdb5460f01290","status":"affected","version":"a08…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/hugetlb.h","mm/userfaultfd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.7"},{"lessThan":"6.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.84","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/hugetlb.h","mm/userfaultfd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5a525c43baaba0bf3063f86996ca3623b71e4172","status":"affected","version":"a08c7193e4f18dc8508f2d07d0de2c5b94cb39a3","versionType":"git"},{"lessThan":"574501ede47ac439afd67ba9812bc66722d500ba","status":"affected","version":"a08c7193e4f18dc8508f2d07d0de2c5b94cb39a3","versionType":"git"},{"lessThan":"08282b1bf74c69fc8ecd25493e7fdb5460f01290","status":"affected","version":"a08…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/hugetlb.h","mm/userfaultfd.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.7"},{"lessThan":"6.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.84","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/affected/1

Source references

5 source assertions
{"url":"https://git.kernel.org/stable/c/0217c7fb4de4a40cee667eb21901f3204effe5ac"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/08282b1bf74c69fc8ecd25493e7fdb5460f01290"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/574501ede47ac439afd67ba9812bc66722d500ba"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/5a525c43baaba0bf3063f86996ca3623b71e4172"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/f4689fc089765d36c026063fb22d23533e883eb6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d681a254226fea27ba4f6a1056bc4694d0313cdae08ca62d2d5ee835139bc9c · sha256:17e79273c2f2cac4… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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