Bug 2520136 - CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument list [fedora-all]
Summary: CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument li...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: rsync
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Michal Ruprich
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["8d21fcf2-54e0-422f-8f07-0...
Depends On:
Blocks: CVE-2026-70456
TreeView+ depends on / blocked
 
Reported: 2026-08-20 07:05 UTC by Srikanth Balasubramanian
Modified: 2026-08-27 01:11 UTC (History)
3 users (show)

Fixed In Version: rsync-3.5.0-1.fc44 rsync-3.5.0-1.fc43
Clone Of:
Environment:
Last Closed: 2026-08-22 01:24:42 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Srikanth Balasubramanian 2026-08-20 07:05:54 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.

Comment 1 Fedora Update System 2026-08-20 12:50:10 UTC
FEDORA-2026-bfae8723e2 (rsync-3.5.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-bfae8723e2

Comment 2 Fedora Update System 2026-08-20 12:50:39 UTC
FEDORA-2026-d6763b4c84 (rsync-3.5.0-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d6763b4c84

Comment 3 Fedora Update System 2026-08-21 05:41:35 UTC
FEDORA-2026-bfae8723e2 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-bfae8723e2`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-bfae8723e2

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-08-21 06:00:41 UTC
FEDORA-2026-d6763b4c84 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-d6763b4c84`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-d6763b4c84

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-08-22 01:24:42 UTC
FEDORA-2026-bfae8723e2 (rsync-3.5.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-08-27 01:11:29 UTC
FEDORA-2026-d6763b4c84 (rsync-3.5.0-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


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