The sosendto function in slirp/udp.c in QEMU before 2.1.2 allows local users to cause a…
Priority LOW 11CWE-476Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Partial Red Hat: 8 fixed, 1 without a fix
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
The sosendto function in slirp/udp.c in QEMU before 2.1.2 allows local users to cause a denial of service (NULL pointer dereference) by sending a udp packet with a value of 0 in the source port and address, which triggers access of an uninitialized socket.
Why it matters now
EPSS 0.00405 34th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 8 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 22
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:a:qemu:qemu:2.0.0:-:*:*:*:*:*:* | 2.0.0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.0.0:rc0:*:*:*:*:*:* | 2.0.0 rc0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.0.0:rc1:*:*:*:*:*:* | 2.0.0 rc1 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.0.0:rc2:*:*:*:*:*:* | 2.0.0 rc2 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.0.0:rc3:*:*:*:*:*:* | 2.0.0 rc3 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.0.2:*:*:*:*:*:*:* | 2.0.2 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.1.0:*:*:*:*:*:*:* | 2.1.0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.1.0:rc0:*:*:*:*:*:* | 2.1.0 rc0 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.1.0:rc1:*:*:*:*:*:* | 2.1.0 rc1 | Vulnerable | QEMU |
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:a:qemu:qemu:2.0.0:-:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.0.0:rc0:*:*:*:*:*:* Versions 2.0.0 rc0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.0.0:rc1:*:*:*:*:*:* Versions 2.0.0 rc1 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.0.0:rc2:*:*:*:*:*:* Versions 2.0.0 rc2 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.0.0:rc3:*:*:*:*:*:* Versions 2.0.0 rc3 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.0.2:*:*:*:*:*:*:* Versions 2.0.2 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.1.0:*:*:*:*:*:*:* Versions 2.1.0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.1.0:rc0:*:*:*:*:*:* Versions 2.1.0 rc0 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.1.0:rc1:*:*:*:*:*:* Versions 2.1.0 rc1 Vulnerable ·QEMU
Show 12 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:qemu:qemu:2.1.0:rc2:*:*:*:*:*:* | 2.1.0 rc2 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.1.0:rc3:*:*:*:*:*:* | 2.1.0 rc3 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.1.0:rc5:*:*:*:*:*:* | 2.1.0 rc5 | Vulnerable | QEMU |
| cpe:2.3:a:qemu:qemu:2.1.1:*:*:*:*:*:*:* | 2.1.1 | Vulnerable | QEMU |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:* | 10.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* | 14.10 | Vulnerable | Canonical |
- cpe:2.3:a:qemu:qemu:2.1.0:rc2:*:*:*:*:*:* Versions 2.1.0 rc2 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.1.0:rc3:*:*:*:*:*:* Versions 2.1.0 rc3 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.1.0:rc5:*:*:*:*:*:* Versions 2.1.0 rc5 Vulnerable ·QEMU
- cpe:2.3:a:qemu:qemu:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·QEMU
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_hpc_node:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:* Versions 10.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:* Versions 14.10 Vulnerable ·Canonical
Remediation
Red Hat 2 advisories
- RHSA-2015:0624 Released 2015-03-05 · Red Hat rating Importantqemu-kvm-rhev security, bug fix, and enhancement update
- RHEV-H and VDSM for 7 Hosts libcacard-devel-rhev-10:2.1.2-23.el7, libcacard-rhev-10:2.1.2-23.el7, libcacard-tools-rhev-10:2.1.2-23.el7 +4
- RHSA-2015:0349 Released 2015-03-05 · Red Hat rating Importantqemu-kvm security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) libcacard-10:1.5.3-86.el7, qemu-img-10:1.5.3-86.el7, qemu-kvm-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Client Optional (v. 7) libcacard-devel-10:1.5.3-86.el7, libcacard-tools-10:1.5.3-86.el7
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcacard-10:1.5.3-86.el7, libcacard-devel-10:1.5.3-86.el7, libcacard-tools-10:1.5.3-86.el7 +4
- Red Hat Enterprise Linux Server (v. 7) libcacard-10:1.5.3-86.el7, qemu-img-10:1.5.3-86.el7, qemu-kvm-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Server Optional (v. 7) libcacard-10:1.5.3-86.el7, libcacard-10:1.5.3-86.el7.ppc, libcacard-devel-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Workstation (v. 7) libcacard-10:1.5.3-86.el7, qemu-img-10:1.5.3-86.el7, qemu-kvm-10:1.5.3-86.el7 +2
- Red Hat Enterprise Linux Workstation Optional (v. 7) libcacard-devel-10:1.5.3-86.el7, libcacard-tools-10:1.5.3-86.el7
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix yet |
| RHEV-H and VDSM for 7 Hosts | Fixed | RHSA-2015:0624 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:0349 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2015:0349 |
Not affected: 1 product
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2014-3640
- 2026-10-03 Alias added: GHSA-j3fm-c8x4-hh72
References
Patch 3
- [Qemu-devel] 20140923 Re: [PATCH v2] slirp: udp: fix NULL pointer dereference because of uninitialized socket
- [Qemu-devel] 20140918 [PATCH v2] slirp: udp: fix NULL pointer dereference because of uninitialized socket
- [Qemu-devel] 20140924 Re: [PATCH v2] slirp: udp: fix NULL pointer dereference because of uninitialized socket
Sources
- CVE-2014-3640 · CVE Program
- CVE-2014-3640 · NVD
- FIRST EPSS
- GHSA-j3fm-c8x4-hh72 · GitHub Advisory Database · CC BY 4.0
- CVE-2014-3640 · Red Hat security data · CC BY 4.0
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