by Kastro
Paper/Archive/CVE-2026-31536

CVE-2026-31536

Linux Linux — smb: server: let send_done handle a completion without IB_SEND_SIGNALED

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 38.4.384 × 207.7No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux0626e6641f6b467447c81dd7678a69c66f7746cf – < 24082642654f3e5149913946e89c00a297a8868f24082642654f3e5149913946e89c00a297a8868fCNA
Linux0626e6641f6b467447c81dd7678a69c66f7746cf – < e38b415c024bc3b6321bf8650dbf3f4aab8e74b3e38b415c024bc3b6321bf8650dbf3f4aab8e74b3CNA
Linux0626e6641f6b467447c81dd7678a69c66f7746cf – < 9da82dc73cb03e85d716a2609364572367a5ff479da82dc73cb03e85d716a2609364572367a5ff47CNA
Linux5.15–CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgit.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868frefgit.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3refgit.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47