CVE-2026-64379smb: client: mask server-provided mode to 07777 in modefromsid
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e2f8fbfb8d09c06decde162090fac3ee220aa280 before 5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14; from e2f8fbfb8d09c06decde162090fac3ee220aa280 before ee2216dbdf0c677e89bb43e03247dba590ed00ef; from e2f8fbfb8d09c06decde162090fac3ee220aa280 before f511807feee7cb29b61bdfa86472c7e9e2e5df94; from e2f8fbfb8d09c06decde162090fac3ee220aa280 before 08c600b7e1818539ba5efee4cdb06215c245ca78; from e2f8fbfb8d09c06decde162090fac3ee220aa280 before b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d; from e2f8fbfb8d09c06decde162090fac3ee220aa280 before c6c484a7d5bff6b929a86d7ed5130f29834c6a0d; from e2f8fbfb8d09c06decde162090fac3ee220aa280 before f80add1bfb3425100a325b14f19648e75669a954; from e2f8fbfb8d09c06decde162090fac3ee220aa280 before e3d9c7160d483fc8f9e225aafad8ecbbc43f3151 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.4 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 7.2; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14patch
- https://git.kernel.org/stable/c/ee2216dbdf0c677e89bb43e03247dba590ed00efpatch
- https://git.kernel.org/stable/c/f511807feee7cb29b61bdfa86472c7e9e2e5df94patch
- https://git.kernel.org/stable/c/08c600b7e1818539ba5efee4cdb06215c245ca78patch
- https://git.kernel.org/stable/c/b84e002e0df26bbc6cbd3ca01b8212601fe0ae7dpatch
- https://git.kernel.org/stable/c/c6c484a7d5bff6b929a86d7ed5130f29834c6a0dpatch
- https://git.kernel.org/stable/c/f80add1bfb3425100a325b14f19648e75669a954patch
- https://git.kernel.org/stable/c/e3d9c7160d483fc8f9e225aafad8ecbbc43f3151patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.