CVE-2026-31609
smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush() smbd_send_batch_flush() already calls smbd_free_send_io(), so we should not call it again after smbd_post_send() moved it to the batch list.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 24, 2026 |
| Last Updated | May 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
cca0526ef2344cab6944d7f441fc24e152da031b < a9940dcbe5cb92482c04efc7341039ddf7dbf607 37b5c06956183b65e6808b509cf637632016cdf7 < 22b7c1c619d808aec4cad3dc42103345e370d107 21538121efe6c8c5b51c742fa02cbe820bc48714 < f9a162c2bbcd0ac85bd07c5b37cf20286048b65c 21538121efe6c8c5b51c742fa02cbe820bc48714 < 27b7c3e916218b5eb2ee350211140e961bfc49be 6.18.11 < 6.18.24 6.19.1 < 6.19.14
Linux / Linux
7.0
References
git.kernel.org: https://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607 git.kernel.org: https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107 git.kernel.org: https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c git.kernel.org: https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be