smb: client: avoid double-free in smbd_free_send_io() after smbd_send_batch_flush()
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.
02 / AFFECTED SOFTWARE
Affected packages
26 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/22b7c1c619d808aec4cad3dc42103345e370d107
- https://git.kernel.org/stable/c/27b7c3e916218b5eb2ee350211140e961bfc49be
- https://git.kernel.org/stable/c/a9940dcbe5cb92482c04efc7341039ddf7dbf607
- https://git.kernel.org/stable/c/f9a162c2bbcd0ac85bd07c5b37cf20286048b65c
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31609.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-31609