Snapd seccomp filter TIOCSTI ioctl bypass
Priority LOW 39CWE-628Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A vulnerability in the seccomp filters of Canonical snapd before version 2.37.4 allows a strict mode snap to insert characters into a terminal on a 64-bit host. The seccomp rules were generated to match 64-bit ioctl(2) commands on a 64-bit platform; however, the Linux kernel only uses the lower 32 bits to determine which ioctl(2) commands to run. This issue affects: Canonical snapd versions prior to 2.37.4.
Why it matters now
EPSS 0.037 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed snapd (Canonical): 2.37.4
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 |
|---|---|---|---|---|---|
| Canonical | snapd | before 2.37.4 | 2.37.4 | Patch available | CNA |
- snapd VendorCanonical Affected before 2.37.4 Fixed in 2.37.4 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:* | before 2.37.4 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* | 18.10 | Vulnerable | Canonical |
- cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:* Versions before 2.37.4 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
Remediation
- Fix · CNA snapd (Canonical) Fixed in 2.37.4
Timeline
- 2026-10-02 Threatist record created from CVE-2019-7303
- 2026-10-03 Alias added: GHSA-hhhq-qgvm-w5hp
References
Advisory 1
More Canonical Snapd vulnerabilities
- TI-2023-01437 Injection in Canonical snapd CVSS 3.1CRITICAL 10.0
- TI-2019-05192 Local privilege escalation via snapd socket CVSS 3.1CRITICAL 9.8
- TI-2024-01603 snapd allows $HOME/bin symlink CVSS 3.1HIGH 8.2
- TI-2024-04773 Improper input validation in Canonical snapd CVSS 3.1HIGH 8.1
- TI-2020-16634 Improper privilege management in Canonical snapd CVSS 3.1CRITICAL 9.3
- TI-2021-20244 snapd could be made to escalate privileges and run programs as administrator CVSS 3.1HIGH 8.8
Sources
- CVE-2019-7303 · CVE Program
- CVE-2019-7303 · NVD
- FIRST EPSS
- GHSA-hhhq-qgvm-w5hp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences