CVE-2026-31536

smb: server: let send_done handle a completion without IB_SEND_SIGNALED

CVE-2026-31536 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31536 (version 6.18.12-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
9.8
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0044
38th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
linux · Debian 14 6.18.12-1 DEBIAN-CVE-2026-31536 May 15, 2026

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