CVE-2023-5521: Incorrect Authorization in GitHub repository tiann/kernelsu prior to v0.6.9.

Q: How do I fix CVE-2023-5521?

kernelsu: upgrade to 0.6.9. Exact commands for each OS are on this page.

Q: Is CVE-2023-5521 being exploited?

CVE-2023-5521 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-5521 affect?

CVE-2023-5521 affects kernelsu. Severity is critical (CVSS 9.8). Incorrect Authorization in GitHub repository tiann/kernelsu prior to v0.6.9.

Q: How urgent is CVE-2023-5521?

Priority 57/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-5521 is a critical-severity flaw (CVSS 9.8) affecting kernelsu. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect Authorization in GitHub repository tiann/kernelsu prior to v0.6.9.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-863
Published	2023-10-11
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: kernelsu

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-10-11 12:15 UTCPublished CVE record published
2026-06-17 06:48 UTCUpdated Record last modified

kernelsu kernelsu UPGRADE

Affected: < 0.6.9

Fixed in: 0.6.9

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.6.9 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kernelsu

Note

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

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-2023-5521?

kernelsu: upgrade to 0.6.9. Exact commands for each OS are on this page.

Is CVE-2023-5521 being exploited?

CVE-2023-5521 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-2023-5521 affect?

CVE-2023-5521 affects kernelsu. Severity is critical (CVSS 9.8). Incorrect Authorization in GitHub repository tiann/kernelsu prior to v0.6.9.

How urgent is CVE-2023-5521?

Priority 57/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2023-49794 MEDIUM 6.7 UPGRADE KernelSU is a Kernel-based root solution for Android devices
CVE-2023-46139 MEDIUM 5.0 UPGRADE KernelSU is a Kernel based root solution for Android

References

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