(mozilla-projects-nss-nss-3-68-3-release-notes)=

# NSS 3.68.3 (ESR) release notes

## [Introduction](#introduction)

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Network Security Services (NSS) 3.68.3 (ESR) was released on **28 March 2022**.
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## [Distribution Information](#distribution_information)

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The HG tag is NSS_3_68_3_RTM. NSS 3.68.3 requires NSPR 4.32 or newer.

NSS 3.68.3 source distributions are available on ftp.mozilla.org for secure HTTPS download:

- Source tarballs:
  <https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_68_3_RTM/src/>

Other releases are available {ref}`mozilla_projects_nss_releases`.
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(changes-in-nss-3-68-3)=

## [Changes in NSS 3.68.3](#changes_in_nss_3.68.3)

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- Bug 1756271 - Remove token member from NSSSlot struct.
- Bug 1755555 - Hold tokensLock through nssToken_GetSlot calls in nssTrustDomain_GetActiveSlots.
- Bug 1370866 - Check return value of PK11Slot_GetNSSToken.
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## [Compatibility](#compatibility)

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NSS 3.68.3 shared libraries are backwards-compatible with all older NSS 3.x shared
libraries. A program linked with older NSS 3.x shared libraries will work with
this new version of the shared libraries without recompiling or
relinking. Furthermore, applications that restrict their use of NSS APIs to the
functions listed in NSS Public Functions will remain compatible with future
versions of the NSS shared libraries.
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## [Feedback](#feedback)

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Bugs discovered should be reported by filing a bug report on
[bugzilla.mozilla.org](https://bugzilla.mozilla.org/enter_bug.cgi?product=NSS) (product NSS).
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## [Notes](#notes)

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This release improves the stability of NSS when used in a multi-threaded
environment. In particular, it fixes memory safety violations that can occur
when PKCS#11 tokens are removed while in use (CVE-2022-1097). We presume
that with enough effort these memory safety violations are exploitable.
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