Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: smb: client: mask server-provided mode to 07777 in modefromsid When modefromsid is active, parse_dacl() applies the server-provided sub_auth[2] value from the NFS mode SID to cf_mode without masking to 07777. Apply the correct masking, same as in the read path.

Affected versions

Linux: e2f8fbfb8d09c06decde162090fac3ee220aa280 through before 5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14 (git); e2f8fbfb8d09c06decde162090fac3ee220aa280 through before ee2216dbdf0c677e89bb43e03247dba590ed00ef (git); e2f8fbfb8d09c06decde162090fac3ee220aa280 through before f511807feee7cb29b61bdfa86472c7e9e2e5df94 (git); e2f8fbfb8d09c06decde162090fac3ee220aa280 through before 08c600b7e1818539ba5efee4cdb06215c245ca78 (git); e2f8fbfb8d09c06decde162090fac3ee220aa280 through before b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d (git); e2f8fbfb8d09c06decde162090fac3ee220aa280 through before c6c484a7d5bff6b929a86d7ed5130f29834c6a0d (git); e2f8fbfb8d09c06decde162090fac3ee220aa280 through before f80add1bfb3425100a325b14f19648e75669a954 (git); e2f8fbfb8d09c06decde162090fac3ee220aa280 through before e3d9c7160d483fc8f9e225aafad8ecbbc43f3151 (git); 5.4 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.