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4 vulnerabilities found for Firecracker by AWS
CVE-2026-5747 (GCVE-0-2026-5747)
Vulnerability from nvd – Published: 2026-04-07 23:17 – Updated: 2026-04-20 17:24
VLAI
Title
Out-of-bounds Write in Firecracker virtio-pci Transport
Summary
An out-of-bounds write issue in the virtio PCI transport in Firecracker 1.13.0 through 1.14.3 and 1.15.0 on x86_64 and aarch64 might allow a local guest user with root privileges to crash the Firecracker VMM process or potentially execute arbitrary code on the host via modification of virtio queue configuration registers after device activation. Achieving code execution on the host requires additional preconditions, such as the use of a custom guest kernel or specific snapshot configurations.
To remediate this, users should upgrade to Firecracker 1.14.4 or 1.15.1 and later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/firecracker-microvm/firecracke… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | Firecracker |
Affected:
1.13.0 , ≤ 1.14.3
(custom)
Affected: 1.15.0 Unaffected: 1.14.4 Unaffected: 1.15.1 |
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CVE-2026-1386 (GCVE-0-2026-1386)
Vulnerability from nvd – Published: 2026-01-23 20:25 – Updated: 2026-01-23 20:38
VLAI
Title
Arbitrary Host File Overwrite via Symlink in Firecracker Jailer
Summary
A UNIX symbolic link following issue in the jailer component in Firecracker version v1.13.1 and earlier and 1.14.0 on Linux may allow a local host user with write access to the pre-created jailer directories to overwrite arbitrary host files via a symlink attack during the initialization copy at jailer startup, if the jailer is executed with root privileges.
To mitigate this issue, users should upgrade to version v1.13.2 or 1.14.1 or above.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://github.com/firecracker-microvm/firecracke… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | Firecracker |
Unaffected:
1.13.2
Unaffected: 1.14.1 |
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CVE-2026-5747 (GCVE-0-2026-5747)
Vulnerability from cvelistv5 – Published: 2026-04-07 23:17 – Updated: 2026-04-20 17:24
VLAI
Title
Out-of-bounds Write in Firecracker virtio-pci Transport
Summary
An out-of-bounds write issue in the virtio PCI transport in Firecracker 1.13.0 through 1.14.3 and 1.15.0 on x86_64 and aarch64 might allow a local guest user with root privileges to crash the Firecracker VMM process or potentially execute arbitrary code on the host via modification of virtio queue configuration registers after device activation. Achieving code execution on the host requires additional preconditions, such as the use of a custom guest kernel or specific snapshot configurations.
To remediate this, users should upgrade to Firecracker 1.14.4 or 1.15.1 and later.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/firecracker-microvm/firecracke… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | Firecracker |
Affected:
1.13.0 , ≤ 1.14.3
(custom)
Affected: 1.15.0 Unaffected: 1.14.4 Unaffected: 1.15.1 |
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CVE-2026-1386 (GCVE-0-2026-1386)
Vulnerability from cvelistv5 – Published: 2026-01-23 20:25 – Updated: 2026-01-23 20:38
VLAI
Title
Arbitrary Host File Overwrite via Symlink in Firecracker Jailer
Summary
A UNIX symbolic link following issue in the jailer component in Firecracker version v1.13.1 and earlier and 1.14.0 on Linux may allow a local host user with write access to the pre-created jailer directories to overwrite arbitrary host files via a symlink attack during the initialization copy at jailer startup, if the jailer is executed with root privileges.
To mitigate this issue, users should upgrade to version v1.13.2 or 1.14.1 or above.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://github.com/firecracker-microvm/firecracke… | patch |
| https://github.com/firecracker-microvm/firecracke… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | Firecracker |
Unaffected:
1.13.2
Unaffected: 1.14.1 |
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