CVE-2026-64597
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Linux
PublishedAug 6, 2026
First seenAug 6, 2026
Weakness typeCWE-415CWE-415
How to fix
Update
- Linux Linux037511726228aaf165c7067ff2bfc88eaecdf1f3, 0aa97edf7c347c0f54e7e60c4740574b8120c66a, d15d83125007f673aec4323e1bbbaaffbe87ea13, b18ed621dbfceecea5539848cddcb9272c9a61e1, f96e1cdcb63ed3321142ff2fcdf784e32cda8fee, 6.6.145 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 433042a91f9373241307725b52de573933ffedbf ≤ v < 037511726228aaf165c7067ff2bfc88eaecdf1f3, 4f1fffa2376922f3d1d506e49c0fd445b023a28e ≤ v < 0aa97edf7c347c0f54e7e60c4740574b8120c66a, 4f1fffa2376922f3d1d506e49c0fd445b023a28e ≤ v < d15d83125007f673aec4323e1bbbaaffbe87ea13, 4f1fffa2376922f3d1d506e49c0fd445b023a28e ≤ v < b18ed621dbfceecea5539848cddcb9272c9a61e1, 4f1fffa2376922f3d1d506e49c0fd445b023a28e ≤ v < f96e1cdcb63ed3321142ff2fcdf784e32cda8fee, 6.6.32 ≤ v < 6.6.145, 6.8 | 037511726228aaf165c7067ff2bfc88eaecdf1f3, 0aa97edf7c347c0f54e7e60c4740574b8120c66a, d15d83125007f673aec4323e1bbbaaffbe87ea13, b18ed621dbfceecea5539848cddcb9272c9a61e1, f96e1cdcb63ed3321142ff2fcdf784e32cda8fee, 6.6.145 |
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