CVE-2026-41648— Incus: Unbounded YAML Metadata Decode via Parsing
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I. Basic Information for CVE-2026-41648
Vulnerability Information
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Vulnerability Title
Incus: Unbounded YAML Metadata Decode via Parsing
Source: NVD (National Vulnerability Database)
Vulnerability Description
Incus is a system container and virtual machine manager. Prior to version 7.0.0, user provided image and backup tarballs would be unpacked and YAML files parsed without any size restrictions. This was making it easy for an authenticated user to provide a crafted image or backup tarball that when parsed by Incus would lead to a very large YAML document being loaded into memory, potentially causing the entire server to run out of memory. This issue has been patched in version 7.0.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Incus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Incus是LXC开源的一个系统容器和虚拟机管理器。 Incus 7.0.0之前版本存在安全漏洞，该漏洞源于未限制解压后的YAML文件大小，可能导致经过身份验证的用户通过提供特制镜像或备份tarball导致服务器内存耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-41648
| # | POC Description | Source Link | Shenlong Link |
|---|
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- Release Incus 7.0.0 LTS · lxc/incus · GitHubx_refsource_MISC
- Unbounded YAML Metadata Decode via Parsing · Advisory · lxc/incus · GitHubx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-41648
Same Patch Batch · lxc · 2026-05-07 · 4 CVEs total
| CVE-2026-41684 | 6.5 MEDIUM | Incus: Nil Dereferences on Restore via Malformed YAML |
| CVE-2026-41647 | 6.5 MEDIUM | Incus: Nil-Pointer Dereference via S3 Bucket Import |
| CVE-2026-41685 | 4.3 MEDIUM | Incus: Unbounded binary import disk exhaustion |
IV. Related Vulnerabilities
Same product: incus
- CVE-2026-41685
Incus: Unbounded binary import disk exhaustion - CVE-2026-41684
Incus: Nil Dereferences on Restore via Malformed YAML - CVE-2026-41647
Incus: Nil-Pointer Dereference via S3 Bucket Import - CVE-2026-40251
Incus out-of-bounds panic in snapshot metadata handling allo - CVE-2026-40243
Incus OVN TLS verification accepts peer-supplied roots and p
Same vendor: lxc
- CVE-2026-41685
Incus: Unbounded binary import disk exhaustion - CVE-2026-41684
Incus: Nil Dereferences on Restore via Malformed YAML - CVE-2026-41647
Incus: Nil-Pointer Dereference via S3 Bucket Import - CVE-2026-40251
Incus out-of-bounds panic in snapshot metadata handling allo - CVE-2026-40243
Incus OVN TLS verification accepts peer-supplied roots and p
Same weakness: CWE-770
- CVE-2026-42294
Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in W - CVE-2026-42189
Russh: Pre-auth DoS via unbounded allocation in keyboard-int - CVE-2026-42793
Atom table exhaustion via attacker-controlled GraphQL SDL na - CVE-2026-44499
ZEBRA: Permanent Block Discovery Halt via Gossip Queue Satur - CVE-2026-44500
ZEBRA: Allocation Amplification in Inbound Network Deseriali
V. Comments for CVE-2026-41648
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