CVE Explorer

CVE-2026-64398

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add a permission check for FSCTL_SET_ZERO_DATA FSCTL_SET_ZERO_DATA in smb2_ioctl() destroys file data via ksmbd_vfs_zero_data() -> vfs_fallocate(PUNCH_HOLE/ZERO_RANGE) after checking only the share-level KSMBD_TREE_CONN_FLAG_WRITABLE, with no per-handle access check. A handle opened with only FILE_WRITE_ATTRIBUTES still yields an FMODE_WRITE filp (FILE_WRITE_ATTRIBUTES is part of FILE_WRITE_DESIRE_ACCESS_LE, so smb2_cre

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e62f758119a02acf4eaefc0ff165bf136dbf732a268e4fbac6f9f9e98209d23a

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"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":"25377f369688dd0bd814dc8965ed26d44238ecaa","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"3072d82461f498c85daea8766e9d8bfbada31605","status":"affected","version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","versionType":"git"},{"lessThan":"ca53bb17f4e8232cfaece3953d3cef62c559b039","status":"affected","version":"e2f34481b24db2fd634b5e…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/affected/0

{"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:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/affected/1

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/affected/0

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/metrics/0/cvssV3_1

Source references

6 source assertions

{"url":"https://git.kernel.org/stable/c/25377f369688dd0bd814dc8965ed26d44238ecaa"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/references/0

{"url":"https://git.kernel.org/stable/c/3072d82461f498c85daea8766e9d8bfbada31605"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/references/1

{"url":"https://git.kernel.org/stable/c/3320ba068198adc144c89d6661b805acce01735b"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/references/5

{"url":"https://git.kernel.org/stable/c/57f2042fd87d7ce8fc3ac8b6c176e554df68b1a7"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/references/3

{"url":"https://git.kernel.org/stable/c/ca53bb17f4e8232cfaece3953d3cef62c559b039"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/references/2

{"url":"https://git.kernel.org/stable/c/deffa929086d7902e30918adf3dd27ccfe9c08b1"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:57767aee6857962fa6eec0aa77098a08eae335248065261d82c0e7842ec7b02d · sha256:542841774cf2be77… · /containers/cna/references/4

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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