Description
In all versions of ARM Trusted Firmware up to and including v1.4, not initializing or saving/restoring the PMCR_EL0 register can leak secure world timing information.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | arm-trusted-firmware | 2.12.16+dfsg-1 | — |
| Debian 13 | arm-trusted-firmware | No fix yet | — |
| Debian 12 | arm-trusted-firmware | No fix yet | — |