CVE-2026-64387

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_directory_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-25)

CWE

CWE-415

Published

2026-07-25

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/00b0fa425941438b664950a8ee65dfba2def4336
• https://git.kernel.org/stable/c/1665f25b1dea30bf2d02e16245d203a944c9d994
• https://git.kernel.org/stable/c/3317a5d015fca976475aa71df224056777316fde
• https://git.kernel.org/stable/c/3409aedf3c81a810243da94164f6621c9d205c98
• https://git.kernel.org/stable/c/9647492b5e41954be59d5157eddbcd4cdc1656f7

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