Answer in brief
CVE-2026-64383 records a Unknown severity vulnerability in smb: client: fix double-free in SMB2_flush() replay. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=433042a91f9373241307725b52de573933ffedbf <6e27f40b682a5e42a2daae3ce6d96f0e0e16dedb || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <878757163eea684750107a31ea134c103863515d || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <3407240cde132a4b72d6429a2625a09a2f78adaf || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <013a9a3da46c5dabcf18f65ea6a47874ba12a15d || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <4be31c943a3a27a5a0251dbb8f5cb89059ec3d5a || >=6.6.32 <6.6.145 | 6e27f40b682a5e42a2daae3ce6d96f0e0e16dedb, 878757163eea684750107a31ea134c103863515d, 3407240cde132a4b72d6429a2625a09a2f78adaf, 013a9a3da46c5dabcf18f65ea6a47874ba12a15d, 4be31c943a3a27a5a0251dbb8f5cb89059ec3d5a, 6.6.145 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: fix double-free in SMB2_flush() replay SMB2_flush() keeps its response buffer bookkeeping across replay attempts. If a replayable flush response is received and the retry then fails before cifs_send_recv() stores a replacement response, flush_exit will free the stale response pointer a second time. Reinitialize resp_buftype and rsp_iov at the top of the replay loop so cleanup only acts on response state produced by the current attempt. This fixes a double-free without changing replay handling for successful requests.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64383 records a Unknown severity vulnerability in smb: client: fix double-free in SMB2_flush() replay. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=433042a91f9373241307725b52de573933ffedbf <6e27f40b682a5e42a2daae3ce6d96f0e0e16dedb || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <878757163eea684750107a31ea134c103863515d || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <3407240cde132a4b72d6429a2625a09a2f78adaf || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <013a9a3da46c5dabcf18f65ea6a47874ba12a15d || >=4f1fffa2376922f3d1d506e49c0fd445b023a28e <4be31c943a3a27a5a0251dbb8f5cb89059ec3d5a || >=6.6.32 <6.6.145 | 6e27f40b682a5e42a2daae3ce6d96f0e0e16dedb, 878757163eea684750107a31ea134c103863515d, 3407240cde132a4b72d6429a2625a09a2f78adaf, 013a9a3da46c5dabcf18f65ea6a47874ba12a15d, 4be31c943a3a27a5a0251dbb8f5cb89059ec3d5a, 6.6.145 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: fix double-free in SMB2_flush() replay SMB2_flush() keeps its response buffer bookkeeping across replay attempts. If a replayable flush response is received and the retry then fails before cifs_send_recv() stores a replacement response, flush_exit will free the stale response pointer a second time. Reinitialize resp_buftype and rsp_iov at the top of the replay loop so cleanup only acts on response state produced by the current attempt. This fixes a double-free without changing replay handling for successful requests.
Quoted source text, attributed separately from HOL analysis.