CVE-2026-64392
Detail
Awaiting Enrichment This CVE record has been marked for NVD enrichment efforts.
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: use opener credentials for delete-on-close
Delete-on-close can be completed by deferred or durable handle teardown,
where no request work is available. Both the base-file unlink and the ADS
xattr removal consequently run with the ksmbd worker credentials and can
bypass filesystem permission checks.
Run both operations with the credentials captured in struct file when the
handle was opened. This preserves the authenticated user's fsuid, fsgid,
supplementary groups and capability restrictions at final close.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Change History
3 change records found show changes
CVE Modified by kernel.org
8/17/2026 1:17:42 AM
Action
Type
Old Value
New Value
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"f08b3f451f12eee4abd8a5981803bc36db84458b","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"18c59109bb6fb816d5102171666f87cf1e29901d","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"e72c15085b6d86f45d224d98aa75b5cace4aaab9","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"4b7059974549d278e30fe70e2a4e421f9839817d","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"52e2f21911158ec961cd5aae19c56460db382af0","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"f08b3f451f12eee4abd8a5981803bc36db84458b","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"18c59109bb6fb816d5102171666f87cf1e29901d","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"e72c15085b6d86f45d224d98aa75b5cace4aaab9","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"4b7059974549d278e30fe70e2a4e421f9839817d","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"52e2f21911158ec961cd5aae19c56460db382af0","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
CVE Modified by kernel.org
7/27/2026 1:16:46 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"f08b3f451f12eee4abd8a5981803bc36db84458b","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"18c59109bb6fb816d5102171666f87cf1e29901d","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e72c15085b6d86f45d224d98aa75b5cace4aaab9","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"4b7059974549d278e30fe70e2a4e421f9839817d","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"52e2f21911158ec961cd5aae19c56460db382af0","versionType":"git","status":"affected"},{"version":"0","lessThan":"6.6.145","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.12.96","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.18.39","versionType":"semver","status":"affected"},{"version":"0","lessThan":"7.1.4","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"f08b3f451f12eee4abd8a5981803bc36db84458b","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"18c59109bb6fb816d5102171666f87cf1e29901d","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"e72c15085b6d86f45d224d98aa75b5cace4aaab9","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"4b7059974549d278e30fe70e2a4e421f9839817d","versionType":"git","status":"affected"},{"version":"f44158485826c076335d6860d35872271a83791d","lessThan":"52e2f21911158ec961cd5aae19c56460db382af0","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
New CVE Received from kernel.org
7/25/2026 6:17:22 AM
Action
Type
Old Value
New Value
Added
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: use opener credentials for delete-on-close
Delete-on-close can be completed by deferred or durable handle teardown,
where no request work is available. Both the base-file unlink and the ADS
xattr removal consequently run with the ksmbd worker credentials and can
bypass filesystem permission checks.
Run both operations with the credentials captured in struct file when the
handle was opened. This preserves the authenticated user's fsuid, fsgid,
supplementary groups and capability restrictions at final close.
Added
Reference
https://git.kernel.org/stable/c/18c59109bb6fb816d5102171666f87cf1e29901d
Added
Reference
https://git.kernel.org/stable/c/4b7059974549d278e30fe70e2a4e421f9839817d
Added
Reference
https://git.kernel.org/stable/c/52e2f21911158ec961cd5aae19c56460db382af0
Added
Reference
https://git.kernel.org/stable/c/e72c15085b6d86f45d224d98aa75b5cace4aaab9
Added
Reference
https://git.kernel.org/stable/c/f08b3f451f12eee4abd8a5981803bc36db84458b
Added
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"f08b3f451f12eee4abd8a5981803bc36db84458b","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"18c59109bb6fb816d5102171666f87cf1e29901d","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e72c15085b6d86f45d224d98aa75b5cace4aaab9","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"4b7059974549d278e30fe70e2a4e421f9839817d","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"52e2f21911158ec961cd5aae19c56460db382af0","versionType":"git","status":"affected"},{"version":"0","lessThan":"6.6.145","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.12.96","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.18.39","versionType":"semver","status":"affected"},{"version":"0","lessThan":"7.1.4","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/vfs.c","fs/smb/server/vfs_cache.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.96","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.39","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.4","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc1","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Quick Info
CVE Dictionary Entry: CVE-2026-64392 NVD
Published Date: 07/25/2026 NVD
Last Modified: 08/17/2026
Source: kernel.org
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