High [CVE-2026-68457] use opener credentials for FSCTL mutations
This high-severity Red Hat Linux advisory covers CVE-2026-68457 affecting Red Hat Enterprise Linux 10, Red Hat package: kernel.
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Summary
A flaw was found in ksmbd in the Linux kernel. This vulnerability allows certain file system control (FSCTL) operations, specifically SET_SPARSE, SET_ZERO_DATA, and SET_COMPRESSION, to use incorrect credentials.
Consequently, these operations can bypass the security checks established when the file was initially opened. This could enable a local attacker to perform unauthorized modifications to files, circumventing intended access restrictions.
Red Hat severity: Important — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-270.
Affected Red Hat products: Red Hat Enterprise Linux 10. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
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