CVE-2026-31536

CRITICALNVD 9.89.8—

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 18.3%
KEV: Not listed

Published

April 24, 2026

Last Modified

April 28, 2026

Advisory Details (3)

Auto-updated May 10, 2026

No patch confirmed yet.

generic

smb: server: let send_done handle a completion without IB_SEND_SIGNALED - kernel/git/stable/linux.git - Linux kernel stable tree

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

generic

smb: server: let send_done handle a completion without IB_SEND_SIGNALED - kernel/git/stable/linux.git - Linux kernel stable tree

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

generic

smb: server: let send_done handle a completion without IB_SEND_SIGNALED - kernel/git/stable/linux.git - Linux kernel stable tree

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

Data Freshness Timeline

(refreshed 17× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
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2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
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2026-05-24 16:59 UTCepss_batch
2026-05-23 15:21 UTCepss_batch
2026-05-22 21:16 UTCepss_batch

Frequently asked(5)

What is CVE-2026-31536?

CVE-2026-31536 is a critical vulnerability published on April 24, 2026. In the Linux kernel, the following vulnerability has been resolved: smb: server: let senddone handle a completion without IBSEND_SIGNALED With smbdirectsendbatch processing we likely have requests without IBSENDSIGNALED, which will be destroyed in the final request that has IBSENDSIGNALED set. If…

When was CVE-2026-31536 disclosed?

CVE-2026-31536 was first published in the National Vulnerability Database on April 24, 2026, with the most recent update on April 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-31536 actively exploited?

CVE-2026-31536 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-31536?

CVE-2026-31536 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2026-31536?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31536, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-31536

📅 Published

🔄 Last Modified

📋 Advisory Details (3)

smb: server: let send_done handle a completion without IB_SEND_SIGNALED - kernel/git/stable/linux.git - Linux kernel stable tree

smb: server: let send_done handle a completion without IB_SEND_SIGNALED - kernel/git/stable/linux.git - Linux kernel stable tree

smb: server: let send_done handle a completion without IB_SEND_SIGNALED - kernel/git/stable/linux.git - Linux kernel stable tree

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-31536?

Published

Last Modified

Advisory Details (3)

Frequently asked(5)