CVE-2026-45232

Publication date 20 May 2026

Last updated 6 June 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.1 · Low

Score breakdown

Description

Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.

Status

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

Parameter Value
Base score 3.1 · Low
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

Other references

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