PT-2026-36472 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-05-02 · CVE-2026-43055

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/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 In the target core file component, the aio cmd structure does not properly initialize the iocb for the ki write stream. During the execution of a write command via the fd execute rw aio() function, a bogus ki write stream value may be generated. This can lead to unintended write failure statuses when the system checks if iocb->ki write stream exceeds max write streams in the block device.

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

Related Identifiers

CVE-2026-43055

Affected Products

Linux Kernel

References · 12

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43055 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43055 · Vendor Advisory
• https://git.kernel.org/stable/c/4eaff1728d0e69b95933412241bbccf4f797dba8 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43055 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43055 · Security Note
• https://git.kernel.org/stable/c/01f784fc9d0ab2a6dac45ee443620e517cb2a19b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43055 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-43055 · Vendor Advisory
• https://git.kernel.org/stable/c/ce54802fe6bb78eb0feffc66fed6a45d41ffc3ab · Patch
• https://t.me/CVEtracker/52426 · Telegram Post
• https://twitter.com/vuldb/status/2050517195332141186 · Twitter Post
• https://git.kernel.org/linus/01f784fc9d0ab2a6dac45ee443620e517cb2a19b · Note