Answer in brief
CVE-2026-64379 records a High severity (CVSS 7.1) vulnerability in smb: client: mask server-provided mode to 07777 in modefromsid. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <ee2216dbdf0c677e89bb43e03247dba590ed00ef || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <f511807feee7cb29b61bdfa86472c7e9e2e5df94 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <08c600b7e1818539ba5efee4cdb06215c245ca78 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <c6c484a7d5bff6b929a86d7ed5130f29834c6a0d || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <f80add1bfb3425100a325b14f19648e75669a954 || >=e2f8fbfb8d09c06decde162090fac3ee220aa280 <e3d9c7160d483fc8f9e225aafad8ecbbc43f3151 | 5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14, ee2216dbdf0c677e89bb43e03247dba590ed00ef, f511807feee7cb29b61bdfa86472c7e9e2e5df94, 08c600b7e1818539ba5efee4cdb06215c245ca78, b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d, c6c484a7d5bff6b929a86d7ed5130f29834c6a0d, f80add1bfb3425100a325b14f19648e75669a954, e3d9c7160d483fc8f9e225aafad8ecbbc43f3151 |
| Linux/Linuxgeneric | 5.4 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.