CVE-2026-31608

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

CVSS 9.8 CRITICALEPSS 0.5%

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.8EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 Apr 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

Linux · Linux

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References

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