PT-2026-38941 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43299

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 bug exists in the Btrfs file system where the kernel may crash if the file system switches to read-only (RO) mode during a read-repair operation. This occurs when a critical error, such as an ENOSPC (no space left on device) error, triggers a transaction abort that marks the file system as read-only. If a read-repair is pending, the btrfs repair io failure() function may be entered while the super block is already set to read-only, triggering an assertion failure and resulting in a kernel crash.

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

Related Identifiers

CVE-2026-43299

Affected Products

Linux Kernel

References · 15

• https://osv.dev/vulnerability/BELL-CVE-2026-43299 · Vendor Advisory
• https://git.kernel.org/stable/c/8ceaad6cd6e7fa5f73b0b2796a2e85d75d37e9f3 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43299 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43299 · Security Note
• https://ubuntu.com/security/CVE-2026-43299 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43299 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43299 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43299 · Vendor Advisory
• https://git.kernel.org/stable/c/f6df18c001e3dcebc08482d0adeacd0cfea08593 · Patch
• https://git.kernel.org/linus/8ceaad6cd6e7fa5f73b0b2796a2e85d75d37e9f3 · Note
• https://twitter.com/CVEnew/status/2053174644719468574 · Twitter Post
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2026-43299 · Note
• https://twitter.com/windowsforum/status/2053781334028358058 · Twitter Post
• https://t.me/cveNotify/163627 · Telegram Post