CVE-2026-64381

smb: client: Fix next buffer leak in receive_encrypted_standard()

State: Published
Severity: Not scored
Published: Jul 25, 2026
Updated: Aug 17, 2026
Reserved: Jul 19, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 94e4f672db029414b9888b5137a7559f1febf2d8Affected b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 68fc0b6cc03ca58060c0f36454e169f5fe258974Affected b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 07e0ab81df1790afa35732a4e8e07ff831b29008Affected b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 9136a08dc29328edd9867f2545e73906ac9df93bAffected b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 67097772df7791c53d608f04bd31c676ccf79b83Affected b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 297243e365fc9fe2f8e9b7dd535a65d922cd108bAffected b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 927d4805aea0a287d36dd4f826ee24d69a2afee3Affected b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 1c6267a1d5cf4c73b656f8181b310cbbb3e4767bAffected
LinuxLinux	4.19Affected before 4.19Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.96 through 6.12.Not affected 6.18.39 through 6.18.Not affected 7.1.4 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 94e4f672db029414b9888b5137a7559f1febf2d8Affected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 68fc0b6cc03ca58060c0f36454e169f5fe258974Affected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 07e0ab81df1790afa35732a4e8e07ff831b29008Affected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 9136a08dc29328edd9867f2545e73906ac9df93bAffected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 67097772df7791c53d608f04bd31c676ccf79b83Affected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 297243e365fc9fe2f8e9b7dd535a65d922cd108bAffected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 927d4805aea0a287d36dd4f826ee24d69a2afee3Affected
b24df3e30cbf48255db866720fb71f14bf9d2f39 to before 1c6267a1d5cf4c73b656f8181b310cbbb3e4767bAffected

LinuxLinux

4.19Affected
before 4.19Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.96 through 6.12.*Not affected
6.18.39 through 6.18.*Not affected
7.1.4 through 7.1.*Not affected
7.2 and laterNot affected

References

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