CVE Explorer

CVE-2026-64394

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a WRITE_DAC/WRITE_OWNER check to SMB2 SET_INFO SECURITY commit cc57232cae23 ("ksmbd: fix FSCTL permission bypass by adding a permission check for FSCTL_SET_SPARSE") added a fp->daccess gate to fsctl_set_sparse and noted that "similar handle-level checks exist in other functions but are missing here." The SMB2 SET_INFO SECURITY arm is one of the missing ones, and the most security-relevant: smb2_set_info_sec() calls

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6464af86ba89641be5adfb5eaae0de6b20d3eea395c573b990c9f0cf2359e1f9

Known exploited

Not asserted

Disputed

Stale source

Conflicts

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:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /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":"0848b1d8b403f530878195dcbe241a2fddb9d0e1","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"e6aa731f1b4b3e08caebf66a99f04b22bdab2e99","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"9ab2ffd3ed3d4ca1667c52de27026ddabc11e537","status":"affected","version":"e2f34481b24db2fd634b5e…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/affected/0

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/affected/1

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /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:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/metrics/0/cvssV3_1

Source references

6 source assertions

{"url":"https://git.kernel.org/stable/c/0848b1d8b403f530878195dcbe241a2fddb9d0e1"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/44df157a1183a7f746caa970c169255da5ac61f8"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/references/5

{"url":"https://git.kernel.org/stable/c/9ab2ffd3ed3d4ca1667c52de27026ddabc11e537"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/aae600cdaffc6d9ce97645f129799a103a97d06d"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/references/4

{"url":"https://git.kernel.org/stable/c/e6aa731f1b4b3e08caebf66a99f04b22bdab2e99"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /containers/cna/references/1

{"url":"https://git.kernel.org/stable/c/f56535db508ead8dec1c481ad93d7d8acd8f8f1e"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:b69f38eb4ddfa63d0da8c4da4d937bbbacaa177d4471bd2a84a21097ebb3ca98 · sha256:7dccad5279db04fa… · /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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