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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.46% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/00b0fa425941438b664950a8ee65dfba2def4336Patch
- https://git.kernel.org/stable/c/1665f25b1dea30bf2d02e16245d203a944c9d994Patch
- https://git.kernel.org/stable/c/3317a5d015fca976475aa71df224056777316fdePatch
- https://git.kernel.org/stable/c/3409aedf3c81a810243da94164f6621c9d205c98Patch
- https://git.kernel.org/stable/c/9647492b5e41954be59d5157eddbcd4cdc1656f7Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.