Detections
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AlmaLinux 9.6 [TuxCare] Security Update: rsync / rsync-daemon / rsync-rrsync Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1789554695)
high Nessus Plugin ID 352912
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Synopsis
The AlmaLinux host is missing one or more security updates.Description
The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1789554695 advisory.- rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's source tree traversal that allows an attacker who can manipulate a parent directory of the source tree to redirect file reads to unintended paths. Attackers can atomically replace a parent directory component with a symlink pointing outside the source root between path resolution and file open operations to disclose file contents outside the intended transfer root. (CVE-2026-53797)
- rsync before 3.5.0 contains a symlink race condition vulnerability that allows local attackers to cause rsync to apply arbitrary ACLs or extended attributes to unintended files by substituting a symlink at a predictable destination path between the file write and the subsequent acl_set_file() or lsetxattr() call.
Attackers can exploit this timing window to redirect ACL and xattr application through a crafted symlink to files outside the intended destination tree, potentially granting elevated permissions and enabling local privilege escalation. (CVE-2026-53799)
- rsync before 3.5.0 contains a symlink race condition vulnerability in the --remove-source-files feature that allows attackers with symlink creation access to cause arbitrary file deletion. Attackers can atomically substitute a symlink for a source file between transfer completion and the unlink() call, causing rsync to delete the symlink target rather than the intended source file. (CVE-2026-53800)
- rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's directory scanning logic that allows attackers to cause the sender to enumerate and transfer files outside the module root's intended subtree. Attackers who can create or manipulate symlinks in a path component of the scanned tree can replace a symlink with a directory entry pointing outside the module root between the lstat() call and the subsequent opendir() call, exposing files beyond the intended root in both daemon-mode and non-daemon sender-side scanning. (CVE-2026-53801)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages based on the guidance in TuxCare advisory ALMALINUX9.6:CLSA-2026:1789554695.See Also
Plugin Details
Severity: High
ID: 352912
File Name: tuxcare_alma_linux_9.6_CLSA-2026-1789554695.nasl
Version: 1.2
Type: Local
Family: Alma Linux Local Security Checks
Published: 9/30/2026
Updated: 10/1/2026
Supported Sensors: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.3
Percentile: 53.52
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 5.5
Temporal Score: 4.1
Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:N
CVSS Score Source: CVE-2026-53799
CVSS v3
Risk Factor: Medium
Base Score: 6.3
Temporal Score: 5.5
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.2
Threat Score: 4.6
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score Source: CVE-2026-53801
Vulnerability Information
Required KB Items: Host/OS/extended-third-party, Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 9/16/2026
Vulnerability Publication Date: 8/13/2026
Reference Information
CVE: CVE-2026-53797, CVE-2026-53799, CVE-2026-53800, CVE-2026-53801
CLSA: 2026:1789554695