by Kastro
Paper/Archive/CVE-2026-31608

CVE-2026-31608

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

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 39.7.397 × 207.9No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux5ef18a2e66f2f33fdac64437bddfb9fe6389fdc7 – < 6968c91fab05b8fc4d6700e0cf34472bb422df256968c91fab05b8fc4d6700e0cf34472bb422df25CNA
Linux79242e7b6bc63efec28b7c235bc320806afce6c0 – < 2ba03f46132b0d1a7bafb86e1ef61951a22540232ba03f46132b0d1a7bafb86e1ef61951a2254023CNA
Linux34abd408c8ba24d7c97bd02ba874d8c714f49db1 – < 830de6eeb9db4cb7e758201fb99328ef4ca4b032830de6eeb9db4cb7e758201fb99328ef4ca4b032CNA
Linux34abd408c8ba24d7c97bd02ba874d8c714f49db1 – < 84ff995ae826aa6bbcc6c7b9ea569ff67c021d7284ff995ae826aa6bbcc6c7b9ea569ff67c021d72CNA
Linux6.18.11 – < 6.18.246.18.24CNA
Linux6.19.1 – < 6.19.146.19.14CNA
Linux7.07.0.1CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgit.kernel.org/stable/c/6968c91fab05b8fc4d6700e0cf34472bb422df25refgit.kernel.org/stable/c/2ba03f46132b0d1a7bafb86e1ef61951a2254023refgit.kernel.org/stable/c/830de6eeb9db4cb7e758201fb99328ef4ca4b032refgit.kernel.org/stable/c/84ff995ae826aa6bbcc6c7b9ea569ff67c021d72