CVE-2023-46139 — KernelSU is a Kernel based root solution for Android

KernelSU is a Kernel based root solution for Android. Starting in version 0.6.1 and prior to version 0.7.0, if a KernelSU installed device is infected with a malware whose app signing block specially constructed, it can take over root privileges on the device. The vulnerable veri

01What is this vulnerability?

KernelSU is a Kernel based root solution for Android. Starting in version 0.6.1 and prior to version 0.7.0, if a KernelSU installed device is infected with a malware whose app signing block specially constructed, it can take over root privileges on the device. The vulnerable verification logic actually obtains the signature of the last block with an id of `0x7109871a`, while the verification…

02Affected products

Vendor	Product	Versions
tiann	KernelSU	>= 0.6.1, < 0.7.0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-10-30T23:58:05.891Z
• Last modified: 2024-09-05T20:16:47.667Z

09References

• github.com — https://github.com/tiann/KernelSU/security/advisories/GHSA-86cp-3prf-pwqq
• github.com — https://github.com/tiann/KernelSU/commit/d24813b2c3738f2f9bd762932141cadd948c354…
• drive.google.com — https://drive.google.com/drive/folders/1XdYCCAhC_mkt1k1IyUiwcgFsuOFvwNRl
• github.com — https://github.com/tiann/KernelSU/blob/344c08bb79ba12b692016750cda363f9f3500182/…
• github.com — https://github.com/tiann/KernelSU/blob/344c08bb79ba12b692016750cda363f9f3500182/…
• aospxref.com — http://aospxref.com/android-14.0.0_r2/xref/frameworks/base/core/java/android/uti…
• aospxref.com — http://aospxref.com/android-14.0.0_r2/xref/frameworks/base/core/java/android/uti…