CVE-2026-31536

CRITICAL

smb: server: let send_done handle a completion without IB_SEND_SIGNALED

Title source: cna

Description

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.

References (3)

Core 3

Core References

https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f

https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3

https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47

Scores

CVSS v3 9.8

EPSS 0.0005

EPSS Percentile 16.6%

Attack Vector NETWORK

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

Details

Status published

Products (12)

Linux/Linux < 5.15

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 24082642654f3e5149913946e89c00a297a8868f

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 9da82dc73cb03e85d716a2609364572367a5ff47

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - e38b415c024bc3b6321bf8650dbf3f4aab8e74b3

Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 24082642654f3e5149913946e89c00a297a8868f

Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - 9da82dc73cb03e85d716a2609364572367a5ff47

Linux/Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 - e38b415c024bc3b6321bf8650dbf3f4aab8e74b3

Linux/Linux 5.15

Linux/Linux 6.18.11 - 6.18.*

Linux/Linux 6.19.1 - 6.19.*

... and 2 more

Published Apr 24, 2026

Tracked Since Apr 24, 2026