Medium6.5Red Hat Linux

Medium [CVE-2026-2340] vfs_worm does not block directory modification

This medium-severity Red Hat Linux advisory covers CVE-2026-2340 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On.

CVE-2026-2340 Published May 27, 2026

CVE-2026-2340

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

vfs_worm does not block directory modification. Red Hat rates this moderate (CVSS 6.5).

Weakness: CWE-280. Affected package(s): samba, rhcos.

Resolved in Red Hat advisory RHSA-2026:29863 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; and 6 more.

Affected versions

samba-0:4.23.5-109.el10_2
samba-0:4.17.5-7.el8_8.1
samba-0:4.19.4-16.el8_10
samba-0:4.21.3-14.el9_6.1
samba-0:4.19.4-105.el9_4.4
rhcos-4.19.9.6.202606241344-0
samba-0:4.17.5-105.el9_2.5
samba-0:4.23.5-10.el9_8
samba-0:4.21.3-114.el10_0.1
samba-0:4.15.5-16.el8_6.1

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:29863

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:29863 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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