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Fencer Vulns
medium 5.5

CVE-2019-9824 json

tcp_emu in slirp/tcp_subr.c (aka slirp/src/tcp_subr.c) in QEMU 3.0.0 uses uninitialized data in an snprintf call, leading to Information di…

published 2019-06-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-19186

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

tcp_emu in slirp/tcp_subr.c (aka slirp/src/tcp_subr.c) in QEMU 3.0.0 uses uninitialized data in an snprintf call, leading to Information disclosure.

Patch / fix

  • qemu Debian 14, Debian 13, Debian 12 1:3.1+dfsg-6
  • slirp4netns Debian 14, Debian 13, Debian 12 0.3.1-1

debian advisories DEBIAN-CVE-2019-9824

  • qemu Ubuntu 14.04 LTS 2.0.0+dfsg-2ubuntu1.46
  • qemu Ubuntu 16.04 LTS 1:2.5+dfsg-5ubuntu10.38
  • qemu Ubuntu 18.04 LTS 1:2.11+dfsg-1ubuntu7.13

ubuntu advisories UBUNTU-CVE-2019-9824

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • SLOF RHEL 8 20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab
  • hivex RHEL 8 1.3.15-7.module+el8.1.0+4066+0f1aadab
  • netcf RHEL 8 0.2.8-12.module+el8.1.0+4066+0f1aadab
  • nbdkit RHEL 8 1.4.2-5.module+el8.1.0+4066+0f1aadab
  • libvirt RHEL 8 4.5.0-35.module+el8.1.0+4227+b2722cb3
  • seabios RHEL 8 1.11.1-4.module+el8.1.0+4066+0f1aadab
  • sgabios RHEL 8 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab
  • libiscsi RHEL 8 1.18.0-8.module+el8.1.0+4066+0f1aadab

red hat advisories RHSA-2019:3345RHSA-2019:2425RHSA-2019:2078RHSA-2019:2553RHSA-2019:1650

  • kvm SLE Point of Sale 11 SP3 1.4.2-53.32.1
  • qemu SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 2.6.2-41.52.1
  • qemu SLE Module for Server Applications 15, SLE Module for Basesystem 15 2.11.2-9.25.1
  • qemu SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 2.11.2-5.13.1
  • xen SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.7.6_06-43.48.1
  • xen SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 +1 more 4.11.1_04-2.6.1
  • xen SLE Point of Sale 11 SP3 4.2.5_21-45.30.1
  • xen SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 4.4.4_40-61.43.2

suse advisories SUSE-SU-2019:14053-1SUSE-SU-2019:14052-1SUSE-SU-2019:1272-1SUSE-SU-2019:1269-1SUSE-SU-2019:1268-1SUSE-SU-2019:1239-1

  • qemu openSUSE Tumbleweed 6.1.0-32.1
  • qemu openSUSE Leap 15.0 2.11.2-lp150.7.22.1

opensuse advisories openSUSE-SU-2024:11287-1openSUSE-SU-2019:1405-1

  • netcf AlmaLinux 8 0.2.8-12.module_el8.5.0+2608+72063365
  • netcf AlmaLinux 8 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf AlmaLinux 8 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
  • sgabios AlmaLinux 8 1:0.20170427git-3.module_el8.5.0+2608+72063365
  • sgabios AlmaLinux 8 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea
  • libiscsi AlmaLinux 8 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libiscsi AlmaLinux 8 1.18.0-8.module_el8.5.0+2608+72063365
  • libiscsi AlmaLinux 8 1.18.0-8.module_el8.3.0+2048+e7a0a3ea

almalinux advisories ALSA-2019:3345

  • netcf Rocky Linux 8 0.2.8-12.module+el8.7.0+1084+97b81f61
  • netcf Rocky Linux 8 0.2.8-12.module+el8.4.0+534+4680a14e
  • netcf Rocky Linux 8 0.2.8-12.module+el8.6.0+847+b490afdd
  • sgabios Rocky Linux 8 1:0.20170427git-3.module+el8.7.0+1084+97b81f61
  • sgabios Rocky Linux 8 1:0.20170427git-3.module+el8.4.0+534+4680a14e
  • sgabios Rocky Linux 8 1:0.20170427git-3.module+el8.6.0+847+b490afdd
  • libiscsi Rocky Linux 8 1.18.0-8.module+el8.7.0+1084+97b81f61
  • libiscsi Rocky Linux 8 1.18.0-8.module+el8.4.0+534+4680a14e

rocky linux advisories RLSA-2019:3345

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-2019-9824 updated cvss 2.8

QEMU: slirp: information leakage in tcp_emu() due to uninitialized stack variables

  • Red Hat Enterprise Linux 5 kvm
    affected: no fix planned “Will not fix”
  • Red Hat OpenStack Platform 8 (Liberty) qemu-img-rhev, qemu-kvm-rhev, libcacard-rhev, qemu-kvm-tools-rhev, libcacard-devel-rhev, libcacard-tools-rhev, +1 more Red Hat OpenStack Platform 9 (Mitaka) qemu-img-rhev, qemu-kvm-rhev, libcacard-rhev, qemu-kvm-tools-rhev, libcacard-devel-rhev, libcacard-tools-rhev, +1 more
    affected: no fix available “Fix deferred”
  • Red Hat CodeReady Linux Builder (v. 8) hivex 1.3.15-7.module+el8.1.0+4066+0f1aadab, netcf 0.2.8-12.module+el8.1.0+4066+0f1aadab, libvirt 4.5.0-35.module+el8.1.0+4227+b2722cb3, seabios 1.11.1-4.module+el8.1.0+4066+0f1aadab, libiscsi 1.18.0-8.module+el8.1.0+4066+0f1aadab, netcf-libs 0.2.8-12.module+el8.1.0+4066+0f1aadab, +34 more Red Hat Enterprise Linux AppStream (v. 8) hivex 1.3.15-7.module+el8.1.0+4066+0f1aadab, nbdkit 1.4.2-5.module+el8.1.0+4066+0f1aadab, netcf 0.2.8-12.module+el8.1.0+4066+0f1aadab, libvirt 4.5.0-35.module+el8.1.0+4227+b2722cb3, seabios 1.11.1-4.module+el8.1.0+4066+0f1aadab, libiscsi 1.18.0-8.module+el8.1.0+4066+0f1aadab, +81 more
    fixed: vendor fix RHSA-2019:3345
  • Red Hat Enterprise Linux Client (v. 7) qemu-img 1.5.3-167.el7, qemu-kvm 1.5.3-167.el7, qemu-kvm-tools 1.5.3-167.el7, qemu-kvm-common 1.5.3-167.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) qemu-img 1.5.3-167.el7, qemu-kvm 1.5.3-167.el7, qemu-kvm-tools 1.5.3-167.el7, qemu-kvm-common 1.5.3-167.el7
    fixed: vendor fix RHSA-2019:2078
  • Red Hat Enterprise Linux Desktop (v. 6) qemu-img 0.12.1.2-2.506.el6_10.4, qemu-kvm 0.12.1.2-2.506.el6_10.4, qemu-kvm-tools 0.12.1.2-2.506.el6_10.4, qemu-guest-agent 0.12.1.2-2.506.el6_10.4 Red Hat Enterprise Linux HPC Node (v. 6) qemu-img 0.12.1.2-2.506.el6_10.4, qemu-kvm 0.12.1.2-2.506.el6_10.4, qemu-kvm-tools 0.12.1.2-2.506.el6_10.4, qemu-guest-agent 0.12.1.2-2.506.el6_10.4 Red Hat Enterprise Linux Server (v. 6) qemu-img 0.12.1.2-2.506.el6_10.4, qemu-kvm 0.12.1.2-2.506.el6_10.4, qemu-kvm-tools 0.12.1.2-2.506.el6_10.4, qemu-guest-agent 0.12.1.2-2.506.el6_10.4
    fixed: vendor fix RHSA-2019:1650
  • Red Hat Enterprise Linux Server (v. 7) qemu-img 1.5.3-167.el7, qemu-kvm 1.5.3-167.el7, qemu-kvm-tools 1.5.3-167.el7, qemu-kvm-common 1.5.3-167.el7
    fixed: vendor fix RHSA-2019:2078
  • Red Hat Enterprise Linux Workstation (v. 6) qemu-img 0.12.1.2-2.506.el6_10.4, qemu-kvm 0.12.1.2-2.506.el6_10.4, qemu-kvm-tools 0.12.1.2-2.506.el6_10.4, qemu-guest-agent 0.12.1.2-2.506.el6_10.4
    fixed: vendor fix RHSA-2019:1650
  • Red Hat Enterprise Linux Workstation (v. 7) qemu-img 1.5.3-167.el7, qemu-kvm 1.5.3-167.el7, qemu-kvm-tools 1.5.3-167.el7, qemu-kvm-common 1.5.3-167.el7
    fixed: vendor fix RHSA-2019:2078
show 3 more
  • Red Hat OpenStack Platform 10.0 qemu-img-rhev 2.12.0-33.el7, qemu-kvm-rhev 2.12.0-33.el7, qemu-kvm-tools-rhev 2.12.0-33.el7, qemu-kvm-common-rhev 2.12.0-33.el7 Red Hat OpenStack Platform 13.0 qemu-img-rhev 2.12.0-33.el7, qemu-kvm-rhev 2.12.0-33.el7, qemu-kvm-tools-rhev 2.12.0-33.el7, qemu-kvm-common-rhev 2.12.0-33.el7 Red Hat OpenStack Platform 14.0 qemu-img-rhev 2.12.0-33.el7, qemu-kvm-rhev 2.12.0-33.el7, qemu-kvm-tools-rhev 2.12.0-33.el7, qemu-kvm-common-rhev 2.12.0-33.el7
    fixed: vendor fix RHSA-2019:2425
  • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts qemu-img-rhev 2.12.0-33.el7, qemu-kvm-rhev 2.12.0-33.el7, qemu-kvm-tools-rhev 2.12.0-33.el7, qemu-kvm-common-rhev 2.12.0-33.el7 Red Hat RHV-M 4.3 qemu-img-rhev 2.12.0-33.el7, qemu-kvm-rhev 2.12.0-33.el7, qemu-kvm-tools-rhev 2.12.0-33.el7, qemu-kvm-common-rhev 2.12.0-33.el7
    fixed: vendor fix RHSA-2019:2553
  • Red Hat Enterprise Linux 5 xen
    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

0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-908 Use of Uninitialized Resource

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.