PT-2026-34888 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-03 · CVE-2026-31536

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the SMB server component where the send done function needs to handle completions that lack the IB SEND SIGNALED flag. During smbdirect send batch processing, requests may be created without this flag and are typically destroyed by the final request that includes it. However, if a connection is broken, all requests are signaled regardless of whether IB SEND SIGNALED was explicitly set.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-31536

Affected Products

Linux Kernel

References · 13

• https://git.kernel.org/stable/c/24082642654f3e5149913946e89c00a297a8868f · Patch
• https://git.kernel.org/stable/c/e38b415c024bc3b6321bf8650dbf3f4aab8e74b3 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31536 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31536 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31536 · Security Note
• https://git.kernel.org/stable/c/9da82dc73cb03e85d716a2609364572367a5ff47 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31536 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31536 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31536 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31536 · Vendor Advisory
• https://git.kernel.org/linus/9da82dc73cb03e85d716a2609364572367a5ff47 · Note
• https://twitter.com/CVEnew/status/2048099285737054619 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2026-31536 · Note