CRITICAL 9.3 NVD
CVE-2026-82876
Phison PS3111-S11 controller firmware verifies RSA signatures using a public modulus embedded within the firmware image itself rather than anchored in immutable
Phison PS3111-S11 controller firmware verifies RSA signatures using a public modulus embedded within the firmware image itself rather than anchored in immutable storage. Attackers can generate arbitrary RSA key pairs, sign modified firmware with the private key, embed the matching modulus in the signature segment, and the controller accepts the tampered firmware as valid.
References
- https://github.com/trulycrisp/psychite
- https://trulycrisp.github.io/drivefirmware/phison_s11/
- https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-signature-verif
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-08-31 via NVD.
Risk Timeline
CVE Disclosed2026-08-31 · -1 days ago
Remediation Resources
Analysis & PoC
trulycrisp.github.io/drivefirmware/phison_s11/
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