A nss regression update has been released for Debian GNU/Linux 9 LTS

DLA 2836-2: nss regression update

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Debian LTS Advisory DLA-2836-2 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
December 08, 2021   https://wiki.debian.org/LTS
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Package : nss
Version : 2:3.26.2-1.1+deb9u4
Debian Bug : 1001219

DLA-2836-1 was rolled out, fixing CVE-2021-43527 in nss, but that
lead to a regression, preventing SSL connections in Chromium. The
complete bug report could be found here:
  https://bugs.debian.org/1001219.

For Debian 9 stretch, this problem has been fixed in version
2:3.26.2-1.1+deb9u4.

We recommend that you upgrade your nss packages.

For the detailed security status of nss please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/nss

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS