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Fencer Vulns
medium 6.5

CVE-2019-19344 json

There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x ve…

published 2020-01-21 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-8965

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x versions before 4.11.5, essentially due to a call to realloc() while other local variables still point at the original buffer.

Patch / fix

  • samba samba 4.9.18, 4.10.12, 4.11.5
  • samba Debian 14, Debian 13, Debian 12 2:4.11.5+dfsg-1

debian advisories DEBIAN-CVE-2019-19344

  • samba SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 +1 more 4.10.17+git.203.862547088ca-3.14.1
  • ldb SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.5.8-3.5.1
  • samba SLE Module for Python 2 15 SP1, SLE Module for Basesystem 15 SP1, SLE High Availability Extension 15 SP1 +1 more 4.9.5+git.243.e76c5cb3d97-3.21.1

suse advisories SUSE-SU-2020:2673-1SUSE-SU-2020:0223-1

  • samba openSUSE Tumbleweed 4.14.6+git.182.2205d5224e3-1.1
  • samba openSUSE Leap 15.1 4.9.5+git.243.e76c5cb3d97-lp151.2.15.1

opensuse advisories openSUSE-SU-2024:11365-1openSUSE-SU-2020:0122-1

  • samba Alpine 3.10 4.10.12-r0
  • samba Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 4.11.5-r0

alpine advisories ALPINE-CVE-2019-19344

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-19344 updated cvss 6.5

samba: Use after free during DNS zone scavenging in Samba AD DC

  • Red Hat Enterprise Linux 5 samba Red Hat Enterprise Linux 6 samba, samba4, samba4-dc, samba-swat, samba4-libs, samba4-pidl, +17 more Red Hat Enterprise Linux 7 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +18 more Red Hat Enterprise Linux 8 ctdb, samba, libnetapi, ctdb-tests, samba-libs, samba-pidl, +24 more Red Hat Storage 3 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +21 more Red Hat Virtualization 4 samba
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.76% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • Red Hat samba

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.