PT-2026-41875 · Linux · Linux Kernel

Published 2026-05-19 · Updated 2026-05-29 · CVE-2026-43493

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 pcrypt crypto component regarding the handling of MAY BACKLOG requests. These requests can return an EBUSY error, which requires proper handling by checking for that specific value and filtering out EINPROGRESS notifications.

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

Related Identifiers

CVE-2026-43493

ECHO-0BA5-19F4-8414

OESA-2026-2492

OESA-2026-2496

OPENSUSE-SU-2026:10859-1

Affected Products

Linux Kernel

References · 51

• https://nvd.nist.gov/vuln/detail/CVE-2023-54237 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43503 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43040 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43493 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43289 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31729 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-22077 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-38051 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-40273 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43407 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43053 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-50762 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-43493 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43493 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43493 · Vendor Advisory