CVE-2026-68457
Detail
Received This CVE record has recently been published to the CVE List and has been included within the NVD dataset.
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: use opener credentials for FSCTL mutations
SET_SPARSE, SET_ZERO_DATA and SET_COMPRESSION operate on an open SMB
handle but call VFS xattr, fallocate or fileattr helpers with the current
ksmbd worker credentials. Those helpers can revalidate inode permissions,
ownership and LSM policy independently of the SMB handle access mask.
Run each operation with the credentials captured in the target file when
the handle was opened. Keep credential handling local to these single-file
FSCTLs rather than applying session credentials to the complete IOCTL
handler, which also contains handle-less and multi-handle operations.
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
8/18/2026 3:16:52 AM
Action
Type
Old Value
New Value
Changed
Affected
Record truncated, showing 2048 of 2294 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a8c18434e1f0d9f7989170bdb0490c0160baf065","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"fb1cae6302d58414ddf029e3f642711bd30243f7","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e205f3e7e8c31a47cd11efb6cf663a527177e432","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"cfb2c6f71d61ed807c9d7a7af331d406f1f31877","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c6394bcaf254c5baf9aff43376020be5db6d3316","versionType":"git","status":"affected"},{"version":"0","lessThan":"6.1.178","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.6.145","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.12.97","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.18.40","versionType":"semver","status":"affected"},{"version":"0","lessThan":"7.1.5","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.1.178","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.40","lessThanOrEqual":"6.1
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","lessThan":"a8c18434e1f0d9f7989170bdb0490c0160baf065","versionType":"git","status":"affected"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","lessThan":"1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2","versionType":"git","status":"affected"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","lessThan":"fb1cae6302d58414ddf029e3f642711bd30243f7","versionType":"git","status":"affected"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","lessThan":"e205f3e7e8c31a47cd11efb6cf663a527177e432","versionType":"git","status":"affected"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","lessThan":"cfb2c6f71d61ed807c9d7a7af331d406f1f31877","versionType":"git","status":"affected"},{"version":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9","lessThan":"c6394bcaf254c5baf9aff43376020be5db6d3316","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.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":"6.1.178","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
CVE Modified by kernel.org
8/17/2026 2:17:54 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
Record truncated, showing 2048 of 2298 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a8c18434e1f0d9f7989170bdb0490c0160baf065","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"fb1cae6302d58414ddf029e3f642711bd30243f7","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e205f3e7e8c31a47cd11efb6cf663a527177e432","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"cfb2c6f71d61ed807c9d7a7af331d406f1f31877","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c6394bcaf254c5baf9aff43376020be5db6d3316","versionType":"git","status":"affected"},{"version":"0","lessThan":"6.1.178","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.6.145","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.12.97","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.18.40","versionType":"semver","status":"affected"},{"version":"0","lessThan":"7.1.5","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.1.178","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.40","lessThanOrEqual":"6.1
Record truncated, showing 2048 of 2294 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a8c18434e1f0d9f7989170bdb0490c0160baf065","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"fb1cae6302d58414ddf029e3f642711bd30243f7","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e205f3e7e8c31a47cd11efb6cf663a527177e432","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"cfb2c6f71d61ed807c9d7a7af331d406f1f31877","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c6394bcaf254c5baf9aff43376020be5db6d3316","versionType":"git","status":"affected"},{"version":"0","lessThan":"6.1.178","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.6.145","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.12.97","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.18.40","versionType":"semver","status":"affected"},{"version":"0","lessThan":"7.1.5","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.1.178","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.40","lessThanOrEqual":"6.1
New CVE Received from kernel.org
8/15/2026 2:17:48 AM
Action
Type
Old Value
New Value
Added
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: use opener credentials for FSCTL mutations
SET_SPARSE, SET_ZERO_DATA and SET_COMPRESSION operate on an open SMB
handle but call VFS xattr, fallocate or fileattr helpers with the current
ksmbd worker credentials. Those helpers can revalidate inode permissions,
ownership and LSM policy independently of the SMB handle access mask.
Run each operation with the credentials captured in the target file when
the handle was opened. Keep credential handling local to these single-file
FSCTLs rather than applying session credentials to the complete IOCTL
handler, which also contains handle-less and multi-handle operations.
Added
Reference
https://git.kernel.org/stable/c/1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2
Added
Reference
https://git.kernel.org/stable/c/a8c18434e1f0d9f7989170bdb0490c0160baf065
Added
Reference
https://git.kernel.org/stable/c/c6394bcaf254c5baf9aff43376020be5db6d3316
Added
Reference
https://git.kernel.org/stable/c/cfb2c6f71d61ed807c9d7a7af331d406f1f31877
Added
Reference
https://git.kernel.org/stable/c/e205f3e7e8c31a47cd11efb6cf663a527177e432
Added
Reference
https://git.kernel.org/stable/c/fb1cae6302d58414ddf029e3f642711bd30243f7
Added
Affected
Record truncated, showing 2048 of 2298 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a8c18434e1f0d9f7989170bdb0490c0160baf065","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"fb1cae6302d58414ddf029e3f642711bd30243f7","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e205f3e7e8c31a47cd11efb6cf663a527177e432","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"cfb2c6f71d61ed807c9d7a7af331d406f1f31877","versionType":"git","status":"affected"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c6394bcaf254c5baf9aff43376020be5db6d3316","versionType":"git","status":"affected"},{"version":"0","lessThan":"6.1.178","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.6.145","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.12.97","versionType":"semver","status":"affected"},{"version":"0","lessThan":"6.18.40","versionType":"semver","status":"affected"},{"version":"0","lessThan":"7.1.5","versionType":"semver","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/server/smb2pdu.c","fs/smb/server/vfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.1.178","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.40","lessThanOrEqual":"6.1
Quick Info
CVE Dictionary Entry: CVE-2026-68457 NVD
Published Date: 08/15/2026 NVD
Last Modified: 08/18/2026
Source: kernel.org
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