CVE-2026-2340

EUVD-2026-32312
A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 56%
Affected Products (NVD)
VendorProductVersion
redhatopenshift_container_platform
4.0
sambasamba
4.1.0 ≤
redhatenterprise_linux
7.0
redhatenterprise_linux
8.0
redhatenterprise_linux
9.0
redhatenterprise_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
samba
bookworm
vulnerable
bookworm (security)
2:4.17.12+dfsg-0+deb12u4
fixed
bullseye
vulnerable
bullseye (security)
vulnerable
forky
2:4.24.3+dfsg-1
fixed
sid
2:4.24.4+dfsg-1
fixed
trixie
vulnerable
trixie (security)
2:4.22.8+dfsg-0+deb13u2
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
ctdb
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
ldb-tools
RHEL 9
0:4.23.5-10.el9_8
fixed
libldb
RHEL 9
0:4.23.5-10.el9_8
fixed
libldb-devel
RHEL 9
0:4.23.5-10.el9_8
fixed
libnetapi
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
libnetapi-devel
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
libsmbclient
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
libsmbclient-devel
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
libwbclient
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
libwbclient-devel
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
python3-ldb
RHEL 9
0:4.23.5-10.el9_8
fixed
python3-samba
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
python3-samba-dc
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
python3-samba-devel
RHEL 8
0:4.19.4-16.el8_10
fixed
python3-samba-test
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-client
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-client-libs
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-common
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-common-libs
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-common-tools
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-dc-libs
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-dcerpc
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-devel
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-gpupdate
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-krb5-printing
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-ldb-ldap-modules
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-libs
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-pidl
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-test
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-test-libs
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-tools
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-usershares
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-vfs-iouring
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-winbind
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-winbind-clients
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-winbind-krb5-locator
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-winbind-modules
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
samba-winexe
RHEL 8
0:4.19.4-16.el8_10
fixed
RHEL 8.6 AUS
0:4.15.5-16.el8_6.1
fixed
RHEL 8.8 E4S
0:4.17.5-7.el8_8.1
fixed
RHEL 8.8 TUS
0:4.17.5-7.el8_8.1
fixed
RHEL 9
0:4.23.5-10.el9_8
fixed
Common Weakness Enumeration
References
https://access.redhat.com/errata/RHSA-2026:22644
https://access.redhat.com/errata/RHSA-2026:22963
https://access.redhat.com/errata/RHSA-2026:25049
https://access.redhat.com/errata/RHSA-2026:25979
https://access.redhat.com/errata/RHSA-2026:28053
https://access.redhat.com/errata/RHSA-2026:28054
https://access.redhat.com/errata/RHSA-2026:28055
https://access.redhat.com/errata/RHSA-2026:28056
https://access.redhat.com/errata/RHSA-2026:28057
https://access.redhat.com/errata/RHSA-2026:29863
https://access.redhat.com/security/cve/CVE-2026-2340
https://bugzilla.redhat.com/show_bug.cgi?id=2447318
https://bugzilla.samba.org/show_bug.cgi?id=15997