CVE-2026-64597
Published: August 7, 2026Last modified: August 14, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_close() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_close_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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| 25 LTS | linux-lts | Fixed (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.43-r0) |
References
- https://git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3
- https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a
- https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1
- https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13
- https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee