RHSA-2026:22963: Critical: samba security update
Published Jun 3, 2026
·Updated
Critical: samba security update
Other sources
Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information.Security Fix(es): samba: Missing access check on reparse point operations (CVE-2026-1933) samba: vfsworm does not block directory modification (CVE-2026-2340) samba: group policy certificate enrollment uses http:// without validation (CVE-2026-3012) samba: Samba: Remote Code Execution in printing subsystem via unescaped job description (CVE-2026-4480) ngtcp2: ngtcp2: Denial of service via stack buffer overflow during QUIC handshake (CVE-2026-40170) samba: Remote Code Execution in SAMR (CVE-2026-4408) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
— Red Hat
Affected Software
266 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64
Red Hat Red Hat CodeReady Linux Builder for ARM 64
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for IBM z Systems
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - 4 years of support
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Red Hat Enterprise Linux for x86_64 - 4 years of updates
Red Hat Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian
Red Hat Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Red Hat CodeReady Linux Builder for x86_64
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redhat/samba-krb5-printing<4.23.5-109.el10_2.aa
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redhat/samba-krb5-printing-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-ldb-ldap-modules<4.23.5-109.el10_2.aa
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redhat/samba-ldb-ldap-modules-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-libs<4.23.5-109.el10_2.aa
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redhat/samba-libs-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-test-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-test-libs-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-tools<4.23.5-109.el10_2.aa
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redhat/samba-vfs-iouring<4.23.5-109.el10_2.aa
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redhat/samba-vfs-iouring-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-winbind<4.23.5-109.el10_2.aa
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redhat/samba-winbind-clients<4.23.5-109.el10_2.aa
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redhat/samba-winbind-clients-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-winbind-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-winbind-krb5-locator<4.23.5-109.el10_2.aa
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redhat/samba-winbind-krb5-locator-debuginfo<4.23.5-109.el10_2.aa
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redhat/samba-winbind-modules<4.23.5-109.el10_2.aa
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redhat/samba-winbind-modules-debuginfo<4.23.5-109.el10_2.aa
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redhat/libldb-devel<4.23.5-109.el10_2
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redhat/libnetapi-devel<4.23.5-109.el10_2
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redhat/libsmbclient-devel<4.23.5-109.el10_2
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redhat/libwbclient-devel<4.23.5-109.el10_2
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redhat/python3-samba-test<4.23.5-109.el10_2
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redhat/samba-devel<4.23.5-109.el10_2
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redhat/samba-pidl<4.23.5-109.el10_2
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redhat/samba-test<4.23.5-109.el10_2
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redhat/samba-test-libs<4.23.5-109.el10_2
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redhat/libldb-devel<4.23.5-109.el10_2
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redhat/libnetapi-devel<4.23.5-109.el10_2
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redhat/libsmbclient-devel<4.23.5-109.el10_2
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redhat/libwbclient-devel<4.23.5-109.el10_2
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redhat/python3-samba-test<4.23.5-109.el10_2
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redhat/samba-devel<4.23.5-109.el10_2
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redhat/samba-test<4.23.5-109.el10_2
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redhat/samba-test-libs<4.23.5-109.el10_2
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redhat/libldb-devel<4.23.5-109.el10_2.aa
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redhat/libnetapi-devel<4.23.5-109.el10_2.aa
4.23.5-109.el10_2.aa
redhat/libsmbclient-devel<4.23.5-109.el10_2.aa
4.23.5-109.el10_2.aa
redhat/libwbclient-devel<4.23.5-109.el10_2.aa
4.23.5-109.el10_2.aa
redhat/python3-samba-test<4.23.5-109.el10_2.aa
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redhat/samba-devel<4.23.5-109.el10_2.aa
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redhat/samba-test<4.23.5-109.el10_2.aa
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redhat/samba-test-libs<4.23.5-109.el10_2.aa
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redhat/libldb-devel<4.23.5-109.el10_2
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redhat/libnetapi-devel<4.23.5-109.el10_2
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redhat/libsmbclient-devel<4.23.5-109.el10_2
4.23.5-109.el10_2
redhat/libwbclient-devel<4.23.5-109.el10_2
4.23.5-109.el10_2
redhat/python3-samba-test<4.23.5-109.el10_2
4.23.5-109.el10_2
redhat/samba-devel<4.23.5-109.el10_2
4.23.5-109.el10_2
redhat/samba-test<4.23.5-109.el10_2
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redhat/samba-test-libs<4.23.5-109.el10_2
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Remediation
Event History
Jun 3, 2026
Advisory Published
via Red Hat·07:10 PM
Data Sourced
via Red Hat·07:10 PM
DescriptionSeverityAffected Software
Jun 10, 2026
Advisory Published
via Red Hat·07:44 PM
Data Sourced
via Red Hat·07:44 PM
Remedy
Frequently Asked Questions
1
What is the severity of RHSA-2026:22963?
The severity of RHSA-2026:22963 is critical with a rating of 9.
2
How do I fix RHSA-2026:22963?
To fix RHSA-2026:22963, apply the provided security update for Samba as outlined in the advisory.
3
What type of vulnerability is addressed in RHSA-2026:22963?
RHSA-2026:22963 addresses a buffer overflow vulnerability in Samba.
4
Which software components are affected by RHSA-2026:22963?
The affected software components include redhat/samba, redhat/libnetapi, and related debuginfo packages.
5
When was RHSA-2026:22963 published?
RHSA-2026:22963 was published on June 3, 2026.