Answer in brief
CVE-2026-64381 records a High severity (CVSS 7.8) vulnerability in smb: client: Fix next buffer leak in receive_encrypted_standard(). 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 7.8. 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 |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <94e4f672db029414b9888b5137a7559f1febf2d8 || >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <68fc0b6cc03ca58060c0f36454e169f5fe258974 || >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <07e0ab81df1790afa35732a4e8e07ff831b29008 || >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <9136a08dc29328edd9867f2545e73906ac9df93b || >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <67097772df7791c53d608f04bd31c676ccf79b83 || >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <297243e365fc9fe2f8e9b7dd535a65d922cd108b || >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <927d4805aea0a287d36dd4f826ee24d69a2afee3 || >=b24df3e30cbf48255db866720fb71f14bf9d2f39 <1c6267a1d5cf4c73b656f8181b310cbbb3e4767b | 94e4f672db029414b9888b5137a7559f1febf2d8, 68fc0b6cc03ca58060c0f36454e169f5fe258974, 07e0ab81df1790afa35732a4e8e07ff831b29008, 9136a08dc29328edd9867f2545e73906ac9df93b, 67097772df7791c53d608f04bd31c676ccf79b83, 297243e365fc9fe2f8e9b7dd535a65d922cd108b, 927d4805aea0a287d36dd4f826ee24d69a2afee3, 1c6267a1d5cf4c73b656f8181b310cbbb3e4767b |
| Linux/Linuxgeneric | 4.19 | 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 11, 2026
In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix next buffer leak in receive_encrypted_standard() receive_encrypted_standard() allocates next_buffer before checking whether the number of compound PDUs already reached MAX_COMPOUND. If the limit check fails, the function returns immediately and the newly allocated next_buffer is not assigned to server->smallbuf/server->bigbuf, making it leaked. Move the MAX_COMPOUND check before allocating next_buffer.
Quoted source text, attributed separately from HOL analysis.