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CVE-2026-31398

In the Linux kernel, the following vulnerability has been resolved: mm/rmap: fix incorrect pte restoration for lazyfree folios We batch unmap anonymous lazyfree folios by folio_unmap_pte_batch. If the batch has a mix of writable and non-writable bits, we may end up setting the entire batch writable. Fix this by respecting writable bit during batching. Although on a successful unmap of a lazyfree folio, the soft-dirty bit is lost, preserve it on pte restoration by respecting the bit during b
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b207e02fc9e30717db6e35df4d903d19e508e14459edffab29d6f09486932198
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/rmap.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"99888a4f340ca8e839a0524556bd4db76d63f4e0","status":"affected","version":"354dffd29575cdf13154e8fb787322354aa9efc4","versionType":"git"},{"lessThan":"a0911ccdba41b0871abbf8412857bafedec3dbe1","status":"affected","version":"354dffd29575cdf13154e8fb787322354aa9efc4","versionType":"git"},{"lessThan":"29f40594a28114b9a9bc87f6cf7bbee9609628f2","status":"affected","version":"354dffd29575cdf13154e8fb787322354aa9…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["mm/rmap.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["mm/rmap.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"99888a4f340ca8e839a0524556bd4db76d63f4e0","status":"affected","version":"354dffd29575cdf13154e8fb787322354aa9efc4","versionType":"git"},{"lessThan":"a0911ccdba41b0871abbf8412857bafedec3dbe1","status":"affected","version":"354dffd29575cdf13154e8fb787322354aa9efc4","versionType":"git"},{"lessThan":"29f40594a28114b9a9bc87f6cf7bbee9609628f2","status":"affected","version":"354dffd29575cdf13154e8fb787322354aa9…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["mm/rmap.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/metrics/0/cvssV3_1

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/29f40594a28114b9a9bc87f6cf7bbee9609628f2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/99888a4f340ca8e839a0524556bd4db76d63f4e0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/a0911ccdba41b0871abbf8412857bafedec3dbe1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98b964126cdffae684ea89696211bdfe497c18a73215b7d7026fa7274f0a3b6c · sha256:fa18d98f901fbae7… · /containers/cna/references/1

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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