Riskcovery

CVE-2026-93786

ksmbd: preserve VFS inherited POSIX ACL mask

State
Published
Severity
8.1 High
Published
Sep 24, 2026
Updated
Oct 30, 2026
Reserved
Sep 18, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: preserve VFS inherited POSIX ACL mask

The VFS initializes a child's POSIX ACL from the parent's default ACL and the requested creation mode. Do not mutate the parent ACL or overwrite the child's VFS-computed access and default ACLs afterwards.

This preserves restrictive ACL_MASK entries and prevents SMB object creation from widening effective permissions.

Scores

CVSSScoreVectorSource
3.18.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • f44158485826c076335d6860d35872271a83791d to before 8493da704275ca5ab67fb88c0ae7b71576e91951Affected
  • f44158485826c076335d6860d35872271a83791d to before 4a19bb1c45667f5a5f6eff9cf6648e0f692d046fAffected
  • f44158485826c076335d6860d35872271a83791d to before 591acf171644de590cda245fd8595b473a1beb70Affected
  • f44158485826c076335d6860d35872271a83791d to before 0093909becbda22b62b39b654dbc607faed59cd0Affected
  • f44158485826c076335d6860d35872271a83791d to before e148e567a9252643baa125cb65d7ae9c2c6cf68aAffected
LinuxLinux
  • 5.15Affected
  • before 5.15Not affected
  • 6.1.191 through 6.1.*Not affected
  • 6.6.158 through 6.6.*Not affected
  • 6.12.111 through 6.12.*Not affected
  • 6.18.53 through 6.18.*Not affected
  • 7.2 and laterNot affected

References

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