CVE-2026-93320
BuildKit improperly handles special files in build snapshots
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Active
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
BuildKit improperly handles special files in build snapshots
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
- Record
CVE-2026-93320- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H - Weakness
- CWE-441
- Updated
- 2026-11-02
EUVDEUVD-2026-92539
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
- Record
EUVD-2026-92539- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H - Updated
- 2026-11-02
NVD
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
- Record
CVE-2026-93320- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-441
- Updated
- 2026-11-02
OSV
BuildKit improperly handles special files in build snapshots
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
- Record
CVE-2026-93320- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H - Weakness
- CWE-441
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-93320
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
- Record
UBUNTU-CVE-2026-93320- CVSS 4.0
- 6.0 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H - Updated
- 2026-11-02
OSVAZL-106806 No score
CVE-2026-93320 affecting package moby-engine 25.0.18-1
BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.
- Record
AZL-106806- Updated
- 2026-11-05
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moby-engineAzure Linux:3 |
through 25.0.18-1 | None known |
docker.ioUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1.6.2~dfsg1-1ubuntu41.10.2-0ubuntu31.10.2-0ubuntu41.10.3-0ubuntu11.10.3-0ubuntu4 Show 19 moreShow less1.10.3-0ubuntu51.10.3-0ubuntu61.11.2-0ubuntu5~16.041.12.1-0ubuntu13~16.04.11.12.3-0ubuntu4~16.04.21.12.6-0ubuntu1~16.04.11.13.1-0ubuntu1~16.04.217.03.2-0ubuntu2~16.04.118.06.1-0ubuntu1~16.04.218.06.1-0ubuntu1.2~16.04.118.09.2-0ubuntu1~16.04.118.09.5-0ubuntu1~16.04.218.09.7-0ubuntu1~16.04.118.09.7-0ubuntu1~16.04.418.09.7-0ubuntu1~16.04.518.09.7-0ubuntu1~16.04.618.09.7-0ubuntu1~16.04.718.09.7-0ubuntu1~16.04.9+esm118.09.7-0ubuntu1~16.04.9+esm2 |
None known |
docker.ioUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 1.13.1-0ubuntu617.03.2-0ubuntu117.03.2-0ubuntu317.03.2-0ubuntu517.12.1-0ubuntu1 Show 22 moreShow less18.06.1-0ubuntu1~18.04.118.06.1-0ubuntu1.2~18.04.118.09.2-0ubuntu1~18.04.118.09.5-0ubuntu1~18.04.218.09.7-0ubuntu1~18.04.118.09.7-0ubuntu1~18.04.318.09.7-0ubuntu1~18.04.419.03.6-0ubuntu1~18.04.119.03.6-0ubuntu1~18.04.219.03.6-0ubuntu1~18.04.320.10.2-0ubuntu1~18.04.220.10.2-0ubuntu1~18.04.320.10.7-0ubuntu1~18.04.120.10.7-0ubuntu1~18.04.220.10.7-0ubuntu5~18.04.220.10.7-0ubuntu5~18.04.320.10.12-0ubuntu2~18.04.120.10.21-0ubuntu1~18.04.220.10.21-0ubuntu1~18.04.320.10.21-0ubuntu1~18.04.3+esm120.10.21-0ubuntu1~18.04.3+esm220.10.21-0ubuntu1~18.04.3+esm3 |
None known |
docker.ioUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 19.03.2-0ubuntu119.03.6-0ubuntu119.03.8-0ubuntu119.03.8-0ubuntu1.20.0419.03.8-0ubuntu1.20.04.1 Show 15 moreShow less19.03.8-0ubuntu1.20.04.220.10.2-0ubuntu1~20.04.220.10.2-0ubuntu1~20.04.320.10.7-0ubuntu1~20.04.120.10.7-0ubuntu1~20.04.220.10.7-0ubuntu5~20.04.120.10.7-0ubuntu5~20.04.220.10.12-0ubuntu2~20.04.120.10.21-0ubuntu1~20.04.120.10.21-0ubuntu1~20.04.220.10.21-0ubuntu1~20.04.420.10.21-0ubuntu1~20.04.520.10.21-0ubuntu1~20.04.620.10.21-0ubuntu1~20.04.6+esm120.10.21-0ubuntu1~20.04.6+esm2 |
None known |
docker.io-appUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 20.10.25-0ubuntu1~20.04.120.10.25-0ubuntu1~20.04.224.0.5-0ubuntu1~20.04.124.0.7-0ubuntu2~20.04.126.1.3-0ubuntu1~20.04.126.1.3-0ubuntu1~20.04.1+esm126.1.3-0ubuntu1~20.04.1+esm2 |
None known |
docker.ioUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 20.10.7-0ubuntu520.10.7-0ubuntu720.10.12-0ubuntu120.10.12-0ubuntu220.10.12-0ubuntu3 Show 11 moreShow less20.10.12-0ubuntu3+gke1.24.120.10.12-0ubuntu420.10.21-0ubuntu1~22.04.220.10.21-0ubuntu1~22.04.320.10.21-0ubuntu1~22.04.520.10.21-0ubuntu1~22.04.620.10.21-0ubuntu1~22.04.720.10.21-0ubuntu1~22.04.7+esm120.10.21-0ubuntu1~22.04.7+esm220.10.21-0ubuntu1~22.04.820.10.21-0ubuntu1~22.04.8+esm1 |
None known |
docker.io-appUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 20.10.25-0ubuntu1~22.04.120.10.25-0ubuntu1~22.04.224.0.5-0ubuntu1~22.04.124.0.7-0ubuntu2~22.04.126.1.3-0ubuntu1~22.04.1 Show 6 moreShow less26.1.3-0ubuntu1~22.04.1+esm127.5.1-0ubuntu3~22.04.127.5.1-0ubuntu3~22.04.228.2.2-0ubuntu1~22.04.129.1.3-0ubuntu3~22.04.129.1.3-0ubuntu3~22.04.2 |
None known |
docker.ioUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 20.10.24+dfsg1-1ubuntu220.10.25+dfsg1-2ubuntu120.10.25+dfsg1-2ubuntu1+esm120.10.25+dfsg1-2ubuntu1+esm220.10.25+dfsg1-2ubuntu1.24.04.120.10.25+dfsg1-2ubuntu1.24.04.1+esm1 |
None known |
docker.io-appUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 24.0.5-0ubuntu124.0.7-0ubuntu124.0.7-0ubuntu224.0.7-0ubuntu324.0.7-0ubuntu4 Show 8 moreShow less24.0.7-0ubuntu4.126.1.3-0ubuntu1~24.04.126.1.3-0ubuntu1~24.04.1+esm127.5.1-0ubuntu3~24.04.127.5.1-0ubuntu3~24.04.228.2.2-0ubuntu1~24.04.129.1.3-0ubuntu3~24.04.129.1.3-0ubuntu3~24.04.2 |
None known |
docker.ioUbuntu:26.10 |
All versions, plus listed versions 27.5.1+dfsg4-2ubuntu128.5.2+dfsg4-5ubuntu1 |
None known |
docker.io-appUbuntu:26.10 |
All versions, plus listed versions 29.1.3-0ubuntu429.1.3-0ubuntu529.1.3-0ubuntu629.7.2-0ubuntu1 |
None known |
docker.ioUbuntu:26.04:LTS |
All versions, plus listed versions 26.1.5+dfsg1-9ubuntu127.5.1+dfsg4-1ubuntu127.5.1+dfsg4-2ubuntu1 |
None known |
docker.io-appUbuntu:26.04:LTS |
All versions, plus listed versions 28.2.2-0ubuntu129.1.2-0ubuntu129.1.3-0ubuntu129.1.3-0ubuntu229.1.3-0ubuntu329.1.3-0ubuntu429.1.3-0ubuntu4.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | OSV | |
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-93320 is a medium vulnerability (CVSS 6.0) in Moby Buildkit, published October 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.11%, the 1st percentile. No source names a fixed version.