CVE-2026-64386
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() 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_info() replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_info_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 · 38th 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/100fb7c455fa86d248b8bd7bb9de757c192870b4Patch
- https://git.kernel.org/stable/c/2a88561d66eb855813cf004a0abe648bbb17de5ePatch
- https://git.kernel.org/stable/c/3c81dda84799f76b42aec598564316e2964440dbPatch
- https://git.kernel.org/stable/c/89234773e8348918111aa15f6922b58cf3843364Patch
- https://git.kernel.org/stable/c/f1add4acb656f5a82806a1ab0e63fed3d8b1bfcaPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.