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CVE-2026-31456

In the Linux kernel, the following vulnerability has been resolved: mm/pagewalk: fix race between concurrent split and refault The splitting of a PUD entry in walk_pud_range() can race with a concurrent thread refaulting the PUD leaf entry causing it to try walking a PMD range that has disappeared. An example and reproduction of this is to try reading numa_maps of a process while VFIO-PCI is setting up DMA (specifically the vfio_pin_pages_remote call) on a large BAR for that process. This wi
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:afeed5dabb6fe54335540337c1f8ee3b58f24e6e726c4d06d94d5395bfc94e1b
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":["mm/pagewalk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"138ada1337b47cc5efb08e517674d46f86268274","status":"affected","version":"f9e54c3a2f5b79ecc57c7bc7d0d3521e461a2101","versionType":"git"},{"lessThan":"38ec58670a0c5fc1edabdeccd857e586b7b3f318","status":"affected","version":"f9e54c3a2f5b79ecc57c7bc7d0d3521e461a2101","versionType":"git"},{"lessThan":"9bbbebd94dd5be25ec8c899d46ef01b33d5d22c0","status":"affected","version":"f9e54c3a2f5b79ecc57c7bc7d0d3521e…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["mm/pagewalk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.84","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["mm/pagewalk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"138ada1337b47cc5efb08e517674d46f86268274","status":"affected","version":"f9e54c3a2f5b79ecc57c7bc7d0d3521e461a2101","versionType":"git"},{"lessThan":"38ec58670a0c5fc1edabdeccd857e586b7b3f318","status":"affected","version":"f9e54c3a2f5b79ecc57c7bc7d0d3521e461a2101","versionType":"git"},{"lessThan":"9bbbebd94dd5be25ec8c899d46ef01b33d5d22c0","status":"affected","version":"f9e54c3a2f5b79ecc57c7bc7d0d3521e…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["mm/pagewalk.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.84","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/affected/1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/138ada1337b47cc5efb08e517674d46f86268274"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/38ec58670a0c5fc1edabdeccd857e586b7b3f318"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/3b89863c3fa482912911cd65a12a3aeef662c250"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/9bbbebd94dd5be25ec8c899d46ef01b33d5d22c0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:74917f4afe76041223ece898b6cee8bb2d097ae06c89480d550bb22d14ec71f7 · sha256:3c6f5a13b101feff… · /containers/cna/references/2

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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