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CVE-2026-64396

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix UAF of struct file_lock in SMB2_LOCK deferred-lock cancellation When a blocking byte-range lock request is deferred in the FILE_LOCK_DEFERRED path, ksmbd registers the asynchronous work into the connection's async_requests list via setup_async_work(). The cancel callback smb2_remove_blocked_lock() holds a reference to the flock. If the lock waiter is subsequently woken up but the work state is no longer KSMBD_WORK_
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8ec03356807a44908195ce8a6f78cd2c0bb975ac5a6c9d53a565f14b324ab9e6
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":"affected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThan…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"367c42a611fe488b7b03f1f6737f4dee0e8b20a2","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"7703fd9aba1f2483c8e55f9ff73b7663e0761ed9","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"463bbd79698513af4dad50fe1c573825f297ca2e","status":"affected","version":"e2f34481b24db2fd634b5e…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThan…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/server/smb2pdu.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"367c42a611fe488b7b03f1f6737f4dee0e8b20a2","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"7703fd9aba1f2483c8e55f9ff73b7663e0761ed9","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"463bbd79698513af4dad50fe1c573825f297ca2e","status":"affected","version":"e2f34481b24db2fd634b5e…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/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:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/metrics/0/cvssV3_1

Source references

6 source assertions
{"url":"https://git.kernel.org/stable/c/367c42a611fe488b7b03f1f6737f4dee0e8b20a2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/463bbd79698513af4dad50fe1c573825f297ca2e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/5aa1cb01155f96824003baf7997cdf1f150caba3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/5c75275c0fc9a2deb0d8f5604edcb16f288171c8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/7703fd9aba1f2483c8e55f9ff73b7663e0761ed9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/d20d1c8ba5765d1d12eefc0aee6385ab3f240e1e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2044a9cf3b4294af76f9a856b06bf0a747130919c50a5287b359b3a9ee073ba · sha256:e56cd6fcc3952cfa… · /containers/cna/references/5

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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