Advisoriesby IbisGoogleCVE-2026-15432
Google Tink-Android: attacker could use timinig information as a side channel
No fix yet
When verifying a mac with a ChunkedMacVerification object, Tink compares the resulting tag with non constant time comparison. This potentially allows an attacker to use timinig information as a side channel in order to get information how many bytes of a given tag match the correct tag. This in turn could allow to find a correct tag bytewise.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Tink-Android Product | <= All releases before 1.21.0, including 1.21.0. | No fix yet |
| Tink-Java Product | <= All releases before 1.21.0, including 1.21.0. | No fix yet |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-208