PT-2026-34889 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-03 · CVE-2026-31537

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A flaw in the SMB server implementation causes corruption of the stream of reassembled data transfer messages when an immediate empty send is triggered. This occurs due to the improper handling of smbdirect socket.send io.bcredits.

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

Related Identifiers

CVE-2026-31537

Affected Products

Linux Kernel

References · 14

• https://git.kernel.org/stable/c/79242e7b6bc63efec28b7c235bc320806afce6c0 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31537 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31537 · Vendor Advisory
• https://git.kernel.org/stable/c/5ef18a2e66f2f33fdac64437bddfb9fe6389fdc7 · Patch
• https://git.kernel.org/stable/c/34abd408c8ba24d7c97bd02ba874d8c714f49db1 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31537 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31537 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31537 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31537 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31537 · Vendor Advisory
• https://git.kernel.org/linus/34abd408c8ba24d7c97bd02ba874d8c714f49db1 · Note
• https://twitter.com/CVEnew/status/2048099284789117131 · Twitter Post
• https://t.me/msrcreports/4059 · Telegram Post
• https://docs.bell-sw.com/security/cves/CVE-2026-31537 · Note