There is a new pull request by tsndqst against master on the void-packages repository

https://github.com/tsndqst/void-packages nss
https://github.com/void-linux/void-packages/pull/34355

nss: update to 3.73
critical security fix
https://www.mozilla.org/en-US/security/advisories/mfsa2021-51/

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A patch file from https://github.com/void-linux/void-packages/pull/34355.patch is attached