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CRITICALCVE-2026-31536Published Modified CNA Linux

CVE-2026-31536: smb: server: let send_done handle a completion without IB_SEND_SIGNALED

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.

Metrics

CVSS v3.1
9.8
Severity
CRITICAL
Fixed in
0
Affected Products
2

Fix available

024082642654f3e5149913946e89c00a297a8868f6.18.116.19.17.09da82dc73cb03e85d716a2609364572367a5ff47e38b415c024bc3b6321bf8650dbf3f4aab8e74b3
Affected packages
  • Linux / Linux
    < 24082642654f3e5149913946e89c00a297a8868f (from 0626e6641f6b467447c81dd7678a69c66f7746cf) · < e38b415c024bc3b6321bf8650dbf3f4aab8e74b3 (from 0626e6641f6b467447c81dd7678a69c66f7746cf) · < 9da82dc73cb03e85d716a2609364572367a5ff47 (from 0626e6641f6b467447c81dd7678a69c66f7746cf)
  • Linux / Linux
    5.15
    Fixed in 0, 6.18.11, 6.19.1, 7.0
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
CVE-2026-31536: smb: server: let send_done handle a completion without IB_SEND_SIGNALED | HarborGuard CVE