CVE-2026-31609
9.8
CRITICAL
CVSS 3.1
EPSS 0.07%
Description
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.
How to fix CVE-2026-31609
To remediate CVE-2026-31609, upgrade the affected package to a fixed version below.
- Debian/linux—upgrade to 6.19.14-1 or later
Is CVE-2026-31609 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 6.19.14-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |