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CVE-2026-31536

smb: server: let send_done handle a completion without IB_SEND_SIGNALED

Published: 4/24/2026 Last updated: 5/11/2026 Reserved: 3/9/2026

In the Linux kernel, the following vulnerability has been resolved: smb: server: let send_done handle a completion without IB_SEND_SIGNALED With smbdirect_send_batch processing we likely have requests without IB_SEND_SIGNALED, which will be destroyed in the final request that has IB_SEND_SIGNALED set. If the connection is broken all requests are signaled even without explicit IB_SEND_SIGNALED.

CNA assigner: Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 9.8 Critical CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Opam packages affected (29)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes ortools_solvers orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (4)

Product Vendor Version
Linux Linux AR3200,S12700,S5300,S5700,S6300,S6700,S7700,S9300,S9700 AR3200 V200R007C00, V200R005C32, V200R005C20,S12700 V200R008C00, V200R007C00,S5300 V200R008C00, V200R007C00, V200R006C00,S5700 V200R008C00, V200R007C00, V200R006C00,S6300 V200R008C00, V200R007C00,S6700 V200R008C00, V200R007C00,S7700 V200R008C00, V200R007C00, V200R006C00,S9300 V200R008C00, V200R007C00, V200R006C00,S9700 V200R008C00, V200R007C00, V200R006C00,
Linux Linux 2.1.2
Linux Linux Versions below 8.2.5P2
Linux Linux n/a

References (6)