CVE-2019-14378: ip_reass in ip_input.c in libslirp 4.0.0 has a heap-based buffer overflow via a large packet because it mishandles a case involving the firs
Noroxi assessment
Priority: Plan (action score 40/100)
- Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
- Probability of exploitation in the next 30 days: 16.6% (FIRST EPSS); higher than 97% of all records.
- Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: fuse-overlayfs (AlmaLinux:8) 0.3-5.module_el8.5.0+119+9a9ec082, 0.3-5.module_el8.4.0+2496+12421f43, 0.3-5.module_el8.3.0+2044+12421f43; oci-systemd-hook (AlmaLinux:8) 1:0.1.15-2.git2d0b8a3.module_el8.4.0+2496+12421f43, 1:0.1.15-2.git2d0b8a3.module_el8.5.0+119+9a9ec082, 1:0.1.15-2.git2d0b8a3.module_el8.3.0+2044+12421f43; oci-umount (AlmaLinux:8) 2:2.3.4-2.git87f9237.module_el8.5.0+119+9a9ec082, 2:2.3.4-2.git87f9237.module_el8.4.0+2496+12421f43, 2:2.3.4-2.git87f9237.module_el8.3.0+2044+12421f43.
- Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Add it to your regular patch cycle. Upgrade to fuse-overlayfs (AlmaLinux:8) 0.3-5.module_el8.5.0+119+9a9ec082, 0.3-5.module_el8.4.0+2496+12421f43, 0.3-5.module_el8.3.0+2044+12421f43; oci-systemd-hook (AlmaLinux:8) 1:0.1.15-2.git2d0b8a3.module_el8.4.0+2496+12421f43, 1:0.1.15-2.git2d0b8a3.module_el8.5.0+119+9a9ec082, 1:0.1.15-2.git2d0b8a3.module_el8.3.0+2044+12421f43; oci-umount (AlmaLinux:8) 2:2.3.4-2.git87f9237.module_el8.5.0+119+9a9ec082, 2:2.3.4-2.git87f9237.module_el8.4.0+2496+12421f43, 2:2.3.4-2.git87f9237.module_el8.3.0+2044+12421f43 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
ip_reass in ip_input.c in libslirp 4.0.0 has a heap-based buffer overflow via a large packet because it mishandles a case involving the first fragment.
- BDU:2019-03648
- ALSA-2019:3403
- ALSA-2019:3494
- DLA-1927-1
- DSA-4506-1
- DSA-4512-1
- openSUSE-SU-2019:2041-1
- openSUSE-SU-2019:2059-1
- openSUSE-SU-2019:2510-1
- RHBA-2019:2715
- RHBA-2019:3723
- RHSA-2019:3179
- RHSA-2019:3403
- RHSA-2019:3494
- RHSA-2019:3742
- RHSA-2019:3787
- RHSA-2019:3968
- RHSA-2019:4344
- RHSA-2020:0366
- RHSA-2020:0775
- Published
- Jul 29, 2019
- Updated
- Jun 16, 2026
- EPSS
- 16.6% · 97th percentile
- CWE
- CWE-755
Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 5 / 30 · 16.6%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- Proof of concept exists, no weaponized module
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| libslirp project | libslirp | cpe:2.3:a:libslirp_project:libslirp |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- libslirp project libslirp4.0.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | fuse-overlayfs | before 0.3-5.module_el8.5.0+119+9a9ec082 | 0.3-5.module_el8.5.0+119+9a9ec082 |
| AlmaLinux:8 | fuse-overlayfs | before 0.3-5.module_el8.4.0+2496+12421f43 | 0.3-5.module_el8.4.0+2496+12421f43 |
| AlmaLinux:8 | fuse-overlayfs | before 0.3-5.module_el8.3.0+2044+12421f43 | 0.3-5.module_el8.3.0+2044+12421f43 |
| AlmaLinux:8 | oci-systemd-hook | before 1:0.1.15-2.git2d0b8a3.module_el8.4.0+2496+12421f43 | 1:0.1.15-2.git2d0b8a3.module_el8.4.0+2496+12421f43 |
| AlmaLinux:8 | oci-systemd-hook | before 1:0.1.15-2.git2d0b8a3.module_el8.5.0+119+9a9ec082 | 1:0.1.15-2.git2d0b8a3.module_el8.5.0+119+9a9ec082 |
| AlmaLinux:8 | oci-systemd-hook | before 1:0.1.15-2.git2d0b8a3.module_el8.3.0+2044+12421f43 | 1:0.1.15-2.git2d0b8a3.module_el8.3.0+2044+12421f43 |
| AlmaLinux:8 | oci-umount | before 2:2.3.4-2.git87f9237.module_el8.5.0+119+9a9ec082 | 2:2.3.4-2.git87f9237.module_el8.5.0+119+9a9ec082 |
| AlmaLinux:8 | oci-umount | before 2:2.3.4-2.git87f9237.module_el8.4.0+2496+12421f43 | 2:2.3.4-2.git87f9237.module_el8.4.0+2496+12421f43 |
| AlmaLinux:8 | oci-umount | before 2:2.3.4-2.git87f9237.module_el8.3.0+2044+12421f43 | 2:2.3.4-2.git87f9237.module_el8.3.0+2044+12421f43 |
| Debian:10 | qemu | before 1:3.1+dfsg-8+deb10u2 | 1:3.1+dfsg-8+deb10u2 |
| Debian:12 | qemu | before 1:4.1-1 | 1:4.1-1 |
| Debian:12 | slirp4netns | before 0.3.2-1 | 0.3.2-1 |
| Debian:8 | qemu | before 1:2.1+dfsg-12+deb8u12 | 1:2.1+dfsg-12+deb8u12 |
| Debian:9 | qemu | before 1:2.8+dfsg-6+deb9u8 | 1:2.8+dfsg-6+deb9u8 |
| openSUSE:Leap 15.0 | qemu | before 2.11.2-lp150.7.25.1 | 2.11.2-lp150.7.25.1 |
| openSUSE:Leap 15.1 | qemu | before 3.1.1.1-lp151.7.6.1 | 3.1.1.1-lp151.7.6.1 |
| openSUSE:Leap 15.1 | qemu | before 3.1.1-lp151.7.3.3 | 3.1.1-lp151.7.3.3 |
| openSUSE:Leap 15.1 | qemu-linux-user | before 3.1.1.1-lp151.7.6.1 | 3.1.1.1-lp151.7.6.1 |
| openSUSE:Leap 15.1 | qemu-linux-user | before 3.1.1-lp151.7.3.2 | 3.1.1-lp151.7.3.2 |
| openSUSE:Leap 15.1 | qemu-testsuite | before 3.1.1-lp151.7.3.3 | 3.1.1-lp151.7.3.3 |
| Red Hat:advanced_virtualization:8.1::el8 | hivex | before 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 | 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 |
| Red Hat:advanced_virtualization:8.1::el8 | hivex-debuginfo | before 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 | 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 |
| Red Hat:advanced_virtualization:8.1::el8 | hivex-debugsource | before 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 | 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 |
| Red Hat:advanced_virtualization:8.1::el8 | hivex-devel | before 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 | 0:1.3.15-7.module+el8.1.0+3554+1a3a94a6 |
+96
Same product
libslirp project: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-1983libslirp: use after free vulnerability cause a denial of service.27Monitor
- CVE-2020-10756An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator.26Monitor
- CVE-2020-8608In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer overflow in later code.23Monitor
Published before and after this one in the same product
- Later →CVE-2020-29129Nov 26, 2020 · ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the to17Monitor
- Later →CVE-2020-29130Nov 26, 2020 · slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even if that exceeds the t18Monitor
- Later →CVE-2021-3592Jun 15, 2021 · An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU.15Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:fuse-overlayfs | 0.3-5.module_el8.3.0+2044+12421f43 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:oci-systemd-hook | 1:0.1.15-2.git2d0b8a3.module_el8.5.0+119+9a9ec082 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:oci-umount | 2:2.3.4-2.git87f9237.module_el8.5.0+119+9a9ec082 · AlmaLinux:8 | Package registry (OSV) |
| debian:qemu | 1:4.1-1 · Debian:12 | Package registry (OSV) |
| debian:slirp4netns | 0.3.2-1 · Debian:12 | Package registry (OSV) |
| opensuse:qemu | 3.1.1-lp151.7.3.3 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:qemu-linux-user | 3.1.1-lp151.7.3.2 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:qemu-testsuite | 3.1.1-lp151.7.3.3 · openSUSE:Leap 15.1 | Package registry (OSV) |
| red hat:hivex | 0:1.3.15-7.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-debuginfo | 0:1.3.15-7.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-debugsource | 0:1.3.15-7.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:hivex-devel | 0:1.3.15-7.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-bash-completion | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-benchmarking | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-benchmarking-debuginfo | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-debuginfo | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-debugsource | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:libguestfs-devel | 1:1.38.4-11.1.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:SLOF | 0:20171214-6.gitfa98132.module+el8.0.0+4084+cceb9f44 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| rocky linux:fuse-overlayfs | 0:0.3-5.module+el8.5.0+681+c9a1951f · Rocky Linux:8 | Package registry (OSV) |
| rocky linux:oci-systemd-hook | 1:0.1.15-2.git2d0b8a3.module+el8.4.0+557+48ba8b2f · Rocky Linux:8 | Package registry (OSV) |
| rocky linux:oci-umount | 2:2.3.4-2.git87f9237.module+el8.4.0+557+48ba8b2f · Rocky Linux:8 | Package registry (OSV) |
| suse:kvm | 1.4.2-60.27.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:qemu | 2.6.2-41.55.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
| suse:xen | 4.4.4_40-61.49.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | dos | 2019-08-20 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+22 d
- TodayNov 2, 2026+2653 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-351 · May 15, 2020(QEMU Güvenlik Güncellemesi)
- TR-20-072 · Feb 5, 2020(QEMU Güvenlik Güncellemesi)
- TR-19-123 · Aug 27, 2019(QEMU Güvenlik Güncellemesi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-755 · Improper Handling of Exceptional ConditionsCVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00008.html
- lists.opensuse.org/opensuse-security-announce/2019-11/msg00034.html
- packetstormsecurity.com/files/154269/QEMU-Denial-Of-Service.html
- www.openwall.com/lists/oss-security/2019/08/01/2
- access.redhat.com/errata/RHSA-2019:3179
- access.redhat.com/errata/RHSA-2019:3403
- access.redhat.com/errata/RHSA-2019:3494
- access.redhat.com/errata/RHSA-2019:3742
- access.redhat.com/errata/RHSA-2019:3787
- access.redhat.com/errata/RHSA-2019:3968
- access.redhat.com/errata/RHSA-2019:4344
- access.redhat.com/errata/RHSA-2020:0366
- access.redhat.com/errata/RHSA-2020:0775
- blog.bi0s.in/2019/08/24/Pwn/VM-Escape/2019-07-29-qemu-vm-escape-cve-2019-14378/
- gitlab.freedesktop.org/slirp/libslirp/commit/126c04acbabd7ad32c2b018fe10dfac2a3bc1210
- lists.debian.org/debian-lts-announce/2019/09/msg00021.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UPLHB2AN663OXAWUQURF7J2X5LHD4VD3/
- news.ycombinator.com/item?id=20799010
- seclists.org/bugtraq/2019/Aug/41
Vendor advisories and official records. Exploit/PoC links are deliberately left out.