Critical 9.8Published Apr 24, 2026

CVE-2026-31608smb: server: avoid double-free in smb_direct_free_sendmsg after smb_direct_flush_send_list()

Updated under an hour ago (Oct 27, 2026, 3:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5ef18a2e66f2f33fdac64437bddfb9fe6389fdc7 before 6968c91fab05b8fc4d6700e0cf34472bb422df25; 79242e7b6bc63efec28b7c235bc320806afce6c0 builds before 2ba03f46132b0d1a7bafb86e1ef61951a2254023; from 34abd408c8ba24d7c97bd02ba874d8c714f49db1 before 830de6eeb9db4cb7e758201fb99328ef4ca4b032; from 34abd408c8ba24d7c97bd02ba874d8c714f49db1 before 84ff995ae826aa6bbcc6c7b9ea569ff67c021d72; from 6.18.11 before 6.18.24; from 6.19.1 before 6.19.14	CNA record
linux linux_kernel linux:linux_kernel	before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1	NVD

References

References

https://git.kernel.org/stable/c/6968c91fab05b8fc4d6700e0cf34472bb422df25	patch
https://git.kernel.org/stable/c/2ba03f46132b0d1a7bafb86e1ef61951a2254023	patch
https://git.kernel.org/stable/c/830de6eeb9db4cb7e758201fb99328ef4ca4b032	patch
https://git.kernel.org/stable/c/84ff995ae826aa6bbcc6c7b9ea569ff67c021d72	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.