CVE-2026-70459: rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that al

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-70459 is a medium-severity flaw (CVSS 5.3) affecting rsync. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that allows remote attackers to crash the daemon by sending a file list whose first entry is a dot entry not typed as a directory. The daemon dereferences the first file list entry as a directory structure pointer without verifying the entry type, resulting in an invalid or uninitialized pointer dereference that terminates the client connection.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-908
Published	2026-08-13
Last modified	2026-10-23

Publisher (CNA): VulnCheck · Vendor: samba

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-13 15:19 UTCPublished CVE record published
2026-10-23 18:10 UTCUpdated Record last modified

samba rsync UPGRADE

Affected: >= 3.0.0 and < 3.5.0

Fixed in: 3.5.0

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy rsync || rpm -q rsync || rsync --version

2. UPGRADE to 3.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rsync

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rsync

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison rsync sudo apt install rsync=<VERSION_BEFORE_3.0.0> sudo apt-mark hold rsync

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list rsync sudo dnf downgrade rsync-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add rsync

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source

sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Debian 12 · rsync · NO FIX YET

Debian 13 · rsync · FIXED · 3.5.0+ds1-0+deb13u1

sudo apt update && sudo apt install --only-upgrade rsync dpkg --compare-versions "$(dpkg-query -W -f='${Version}' rsync)" ge "3.5.0+ds1-0+deb13u1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · rsync · DEFERRED

RHEL 6 · rsync · DEFERRED

RHEL 7 · rsync · DEFERRED

RHEL 8 · rsync · DEFERRED

RHEL 9 · rsync · DEFERRED

Alpine 3.21 · rsync · FIXED · rsync-3.5.0-r0

apk add --upgrade rsync apk info -v rsync

Alpine 3.22 · rsync · FIXED · rsync-3.5.0-r0

apk add --upgrade rsync apk info -v rsync

Alpine 3.23 · rsync · FIXED · rsync-3.5.0-r0

apk add --upgrade rsync apk info -v rsync

Alpine 3.24 · rsync · FIXED · rsync-3.5.0-r0

apk add --upgrade rsync apk info -v rsync

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-3131 · source

sudo dnf update --advisory=ALAS2023-2026-3131

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-70459?

rsync: upgrade to 3.5.0. Exact commands for each OS are on this page.

Is CVE-2026-70459 being exploited?

CVE-2026-70459 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70459 affect?

CVE-2026-70459 affects rsync. Severity is medium (CVSS 5.3). rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that allows remote attackers to crash the daemon by sending a file list whose first entry is a dot entry not typed as a directory. The da

How urgent is CVE-2026-70459?

Priority 37/100. Remotely exploitable, no login, no user action

Software pages

Samba vulnerabilities

Related CVEs

CVE-2026-70463 HIGH 8.1 UPGRADE rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing
CVE-2026-53791 CRITICAL 9.1 UPGRADE rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote att
CVE-2026-70461 HIGH 8.2 UPGRADE rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated
CVE-2026-70455 HIGH 7.5 UPGRADE rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust sys
CVE-2026-53795 HIGH 8.1 UPGRADE rsync before 3.5.0 contains an arbitrary file write vulnerability that allows attackers to write files outside

References

← Back to latest CVEs