PT-2026-6179 · Linux+1 · Linux Kernel+1

Published 2026-01-01 · Updated 2026-02-04 · CVE-2026-23109

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 exists in the Linux kernel’s fs/writeback functionality, specifically within the wait sb inodes() function. The issue involves skipping AS NO DATA INTEGRITY mappings, which can cause indefinite waiting if a faulty FUSE server does not respond to write requests. This restores prior behavior where sync operations are no-ops for FUSE. The vulnerability affects the FUSE filesystem.

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

Exploit

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2026-23109

Affected Products

Fuse

Linux Kernel

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23109.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-23109 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23109 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23109 · Vendor Advisory
• https://git.kernel.org/stable/c/3f4ed5e2b8f111553562507ad6202432c7c57731 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23109 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23109 · Security Note
• https://git.kernel.org/stable/c/f9a49aa302a05e91ca01f69031cb79a0ea33031f · Patch
• https://ubuntu.com/security/CVE-2026-23109 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23109 · Security Note
• https://twitter.com/VulmonFeeds/status/2019183151612846242 · Twitter Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://t.me/CVEtracker/43721 · Telegram Post
• https://git.kernel.org/linus/f9a49aa302a05e91ca01f69031cb79a0ea33031f · Note