CVE-2026-31608

smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()

CVE-2026-31608 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31608 (version 6.19.14-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

9.8

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0046

39th percentile

In the Linux kernel, the following vulnerability has been resolved: smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list() smb_direct_flush_send_list() already calls smb_direct_free_sendmsg(), so we should not call it again after post_sendmsg() moved it to the batch list.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 14	6.19.14-1	DEBIAN-CVE-2026-31608	May 15, 2026

Details

Published
April 24, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31608

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