CVE-2026-31609

CriticalCVSS 9.8/10Last modified Nov 11, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-415

Affected software

VendorProductVersions
LinuxLinux>= cca0526ef2344cab6944d7f441fc24e152da031b, < a9940dcbe5cb92482c04efc7341039ddf7dbf607; >= 37b5c06956183b65e6808b509cf637632016cdf7, < 22b7c1c619d808aec4cad3dc42103345e370d107; >= 21538121efe6c8c5b51c742fa02cbe820bc48714, < f9a162c2bbcd0ac85bd07c5b37cf20286048b65c; >= 21538121efe6c8c5b51c742fa02cbe820bc48714, < 27b7c3e916218b5eb2ee350211140e961bfc49be; >= 6.18.11, < 6.18.24; >= 6.19.1, < 6.19.14
LinuxLinux7.0

References

Timeline

Published
Apr 24, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-31609: Critical severity, CVSS 9.8 | Vulnix