CVE-2026-68457

CVE CVE-2026-68457EUVD EUVD-2026-59079Published 2026-08-15T05:51:18.000ZLast changed 2026-08-18T06:56:05.000ZCVSS 9.1

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.1.5; patch: 0; patch: 7.2; patch: 6.6.145; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a8c18434e1f0d9f7989170bdb0490c0160baf065; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <c6394bcaf254c5baf9aff43376020be5db6d3316; patch: 6.1.178; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <fb1cae6302d58414ddf029e3f642711bd30243f7; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <cfb2c6f71d61ed807c9d7a7af331d406f1f31877; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2; patch: 6.18.40; patch: 6.12.97; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <e205f3e7e8c31a47cd11efb6cf663a527177e432; 5.15

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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