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CRITICALCVE-2026-31609Published Modified CNA Linux

CVE-2026-31609: 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.

Metrics

CVSS v3.1
9.8
Severity
CRITICAL
Fixed in
0
Affected Products
2

Fix available

022b7c1c619d808aec4cad3dc42103345e370d10727b7c3e916218b5eb2ee350211140e961bfc49be6.18.246.19.147.0.17.1-rc1a9940dcbe5cb92482c04efc7341039ddf7dbf607f9a162c2bbcd0ac85bd07c5b37cf20286048b65c
Affected packages
  • Linux / Linux
    < a9940dcbe5cb92482c04efc7341039ddf7dbf607 (from cca0526ef2344cab6944d7f441fc24e152da031b) · < 22b7c1c619d808aec4cad3dc42103345e370d107 (from 37b5c06956183b65e6808b509cf637632016cdf7) · < f9a162c2bbcd0ac85bd07c5b37cf20286048b65c (from 21538121efe6c8c5b51c742fa02cbe820bc48714) · < 27b7c3e916218b5eb2ee350211140e961bfc49be (from 21538121efe6c8c5b51c742fa02cbe820bc48714) · < 6.18.24 (from 6.18.11) · < 6.19.14 (from 6.19.1)
  • Linux / Linux
    7.0
    Fixed in 0, 6.18.24, 6.19.14, 7.0.1, 7.1-rc1
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References