CVE-2026-43619

Description

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
rsync	26.04 LTS resolute	Fixed 3.4.1+ds1-7ubuntu0.2
	25.10 questing	Fixed 3.4.1+ds1-5ubuntu1.2
	24.04 LTS noble	Fixed 3.2.7-1ubuntu1.4
	22.04 LTS jammy	Fixed 3.2.7-0ubuntu0.22.04.6
	20.04 LTS focal	Fixed 3.1.3-8ubuntu0.9+esm1
	18.04 LTS bionic	Fixed 3.1.2-2.1ubuntu1.6+esm3
	16.04 LTS xenial	Fixed 3.1.1-3ubuntu1.3+esm5
	14.04 LTS trusty	Fixed 3.1.0-2ubuntu0.4+esm3

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Severity score breakdown

CVSS version:

Base score 7.2 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	High
Attack requirements	Present
Privileges required	Low
User interaction	None
Vulnerable system - Confidentiality impact	High
Vulnerable system - Integrity impact	High
Vulnerable system - Availability impact	None
Subsequent system - Confidentiality impact	None
Subsequent system - Integrity impact	None
Subsequent system - Availability impact	None

Scores

Parameter	Value
Base score	7.2 · High
Base + Threat score	-
Base + Environmental score	-
Base + Threat + Environmental score	-

Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Base score 6.3 · Medium

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	None

Scores

Parameter	Value
Base score	6.3 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-8283-1
rsync vulnerabilities
20 May 2026

USN-8349-1
rsync vulnerabilities
1 June 2026