PT-2026-64600 · Linux · Linux

CVE-2026-64379 · Published 2026-07-25 · Updated 2026-07-25

Mitre

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.

Related Identifiers

CVE-2026-64379

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-64379 · Security Note
• https://git.kernel.org/stable/c/c6c484a7d5bff6b929a86d7ed5130f29834c6a0d · Note
• https://git.kernel.org/stable/c/b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d · Note
• https://git.kernel.org/stable/c/08c600b7e1818539ba5efee4cdb06215c245ca78 · Note
• https://git.kernel.org/stable/c/f80add1bfb3425100a325b14f19648e75669a954 · Note
• https://git.kernel.org/stable/c/f511807feee7cb29b61bdfa86472c7e9e2e5df94 · Note
• https://git.kernel.org/stable/c/e3d9c7160d483fc8f9e225aafad8ecbbc43f3151 · Note
• https://git.kernel.org/stable/c/ee2216dbdf0c677e89bb43e03247dba590ed00ef · Note
• https://git.kernel.org/stable/c/5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14 · Note