CVE catalog

CVE-2016-1938

nss: CVE-2016-1938

Severity: Medium · CVSS 6.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Published: Jan 26, 2016, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.16% · Oct 25, 2026

The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging use of the (1) mp_div or (2) mp_exptmod function.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	nss	sid	`2:3.131.1-1`	fixed
Debian	nss	forky	`2:3.131.1-1`	fixed
Debian	nss	trixie	`2:3.110-1+deb13u4`	fixed
Debian	nss	trixie-security	`2:3.110-1+deb13u4`	fixed
Debian	nss	bookworm	`2:3.87.1-1+deb12u2`	fixed
Debian	nss	bookworm-security	`2:3.87.1-1+deb12u4`	fixed
Ubuntu	firefox	14.04	`24.0+build1-0ubuntu1`	vulnerable
Ubuntu	firefox	14.04	`25.0+build3-0ubuntu0.13.10.1`	vulnerable
Ubuntu	firefox	14.04	`28.0~b2+build1-0ubuntu2`	vulnerable
Ubuntu	firefox	14.04	`28.0+build1-0ubuntu1`	vulnerable
Ubuntu	firefox	14.04	`28.0+build2-0ubuntu1`	vulnerable
Ubuntu	firefox	14.04	`28.0+build2-0ubuntu2`	vulnerable
Ubuntu	firefox	14.04	`29.0+build1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	firefox	14.04	`30.0+build1-0ubuntu0.14.04.3`	vulnerable
Ubuntu	firefox	14.04	`31.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`32.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`32.0.3+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`33.0+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`34.0+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`35.0+build3-0ubuntu0.14.04.2`	vulnerable
Ubuntu	firefox	14.04	`35.0.1+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`36.0+build2-0ubuntu0.14.04.4`	vulnerable
Ubuntu	firefox	14.04	`36.0.1+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`36.0.4+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`37.0+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`37.0.1+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`37.0.2+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`38.0+build3-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`39.0+build5-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`39.0.3+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`40.0+build4-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`40.0+build4-0ubuntu0.14.04.4`	vulnerable
Ubuntu	firefox	14.04	`40.0.3+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`41.0+build3-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`41.0.1+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`41.0.2+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`42.0+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`43.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`43.0.4+build3-0ubuntu0.14.04.1`	vulnerable
Ubuntu	firefox	14.04	`44.0+build3-0ubuntu0.14.04.1`	fixed
Ubuntu	nss	14.04	`2:3.15.1-1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.2-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu3`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu4`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu5`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu6`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.17.4-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.21-0ubuntu0.14.04.1`	fixed
Ubuntu	thunderbird	14.04	`1:24.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.0+build1-0ubuntu2`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.1.1+build1-0ubuntu0.13.10.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.1.1+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.2.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.4.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.5.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.6.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.1.1+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.1.2+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.2.0+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.3.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.4.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.5.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.6.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.7.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.8.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.2.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.3.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.4.0+build3-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.5.1+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.6.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.7.2+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.8.0+build1-0ubuntu0.14.04.1`	fixed
Ubuntu	thunderbird	16.04	`1:38.3.0+build1-0ubuntu2`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.5.1+build2-0ubuntu1`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.6.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.7.2+build1-0ubuntu0.16.04.1`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.8.0+build1-0ubuntu0.16.04.1`	fixed
Ubuntu	thunderbird	14.04	`1:24.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.0+build1-0ubuntu2`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.1.1+build1-0ubuntu0.13.10.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.1.1+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.2.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.4.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.5.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:24.6.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.1.1+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.1.2+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.2.0+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.3.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.4.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.5.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.6.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.7.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:31.8.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.2.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.3.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.4.0+build3-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.5.1+build2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.6.0+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.7.2+build1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	thunderbird	14.04	`1:38.8.0+build1-0ubuntu0.14.04.1`	fixed
Ubuntu	thunderbird	16.04	`1:38.3.0+build1-0ubuntu2`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.5.1+build2-0ubuntu1`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.6.0+build1-0ubuntu1`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.7.2+build1-0ubuntu0.16.04.1`	vulnerable
Ubuntu	thunderbird	16.04	`1:38.8.0+build1-0ubuntu0.16.04.1`	fixed
Ubuntu	nss	14.04	`2:3.15.1-1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.2-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.3.1-1.1ubuntu1`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu3`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu4`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu5`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu6`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7`	vulnerable
Ubuntu	nss	14.04	`2:3.15.4-1ubuntu7.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.17.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.17.4-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.1`	vulnerable
Ubuntu	nss	14.04	`2:3.19.2.1-0ubuntu0.14.04.2`	vulnerable
Ubuntu	nss	14.04	`2:3.21-0ubuntu0.14.04.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	nss	source	sid	`2:3.21-1`	not yet assigned	Not reported	Not reported
Debian	nss	source	forky	`2:3.21-1`	not yet assigned	Not reported	Not reported
Debian	nss	source	trixie	`2:3.21-1`	not yet assigned	Not reported	Not reported
Debian	nss	source	bookworm	`2:3.21-1`	not yet assigned	Not reported	Not reported
Ubuntu	firefox	deb	14.04	`44.0+build3-0ubuntu0.14.04.1`	Not reported	UBUNTU-CVE-2016-1938	Not reported
Ubuntu	nss	deb	14.04	`2:3.21-0ubuntu0.14.04.1`	Not reported	UBUNTU-CVE-2016-1938	Not reported
Ubuntu	thunderbird	deb	14.04	`1:38.8.0+build1-0ubuntu0.14.04.1`	Not reported	UBUNTU-CVE-2016-1938	Not reported
Ubuntu	thunderbird	deb	16.04	`1:38.8.0+build1-0ubuntu0.16.04.1`	Not reported	UBUNTU-CVE-2016-1938	Not reported
Ubuntu	thunderbird	deb	14.04	`1:38.8.0+build1-0ubuntu0.14.04.1`	Not reported	USN-2973-1	Not reported
Ubuntu	thunderbird	deb	16.04	`1:38.8.0+build1-0ubuntu0.16.04.1`	Not reported	USN-2973-1	Not reported
Ubuntu	nss	deb	14.04	`2:3.21-0ubuntu0.14.04.1`	Not reported	USN-2903-1	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libnss3]Unknown
Source package: [nss]
Details (4)
- 2:3.87.1-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
[libnss3-dev]Unknown
Source package: [nss]
Details (4)
- 2:3.87.1-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
[libnss3-tools]Unknown
Source package: [nss]
Details (4)
- 2:3.87.1-1+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · amd64 · bookworm-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12
- 2:3.87.1-1+deb12u4 · arm64 · bookworm-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · bookworm; dsa · nss · debian · 12

[Debian 13 (Trixie)]

[libnss3]Unknown
Source package: [nss]
Details (4)
- 2:3.110-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · amd64 · trixie-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · arm64 · trixie-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
[libnss3-dev]Unknown
Source package: [nss]
Details (4)
- 2:3.110-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · amd64 · trixie-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · arm64 · trixie-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
[libnss3-tools]Unknown
Source package: [nss]
Details (4)
- 2:3.110-1+deb13u3 · amd64 · trixie
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u3 · arm64 · trixie
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · amd64 · trixie-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13
- 2:3.110-1+deb13u4 · arm64 · trixie-security
  Fixed · Fixed: 2:3.21-1
  dsa · nss · debian · 13

Observed: Oct 23, 2026, 5:19:34 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]