CVE-2026-33743— Incus vulnerable to denial of source through crafted bucket backup file
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I. Basic Information for CVE-2026-33743
Vulnerability Information
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Vulnerability Title
Incus vulnerable to denial of source through crafted bucket backup file
Source: NVD (National Vulnerability Database)
Vulnerability Description
Incus is a system container and virtual machine manager. Prior to version 6.23.0, a specially crafted storage bucket backup can be used by an user with access to Incus' storage bucket feature to crash the Incus daemon. Repeated use of this attack can be used to keep the server offline causing a denial of service of the control plane API. This does not impact any running workload, existing containers and virtual machines will keep operating. Version 6.23.0 fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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 6.23.0之前版本存在安全漏洞，该漏洞源于特制存储桶备份可被利用，可能导致拒绝服务。
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-2026-33743
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Same Patch Batch · lxc · 2026-03-26 · 6 CVEs total
| CVE-2026-33897 | 10.0 CRITICAL | Incus vulnerable to arbitrary file read and write through pongo templates |
| CVE-2026-33945 | 10.0 CRITICAL | Abitrary file write through systemd-creds option |
| CVE-2026-33898 | 8.8 HIGH | Local Incus UI web server vulnerable to nuthentication bypass |
| CVE-2026-33711 | Incus vulnerable to local privilege escalation through VM screenshot path | |
| CVE-2026-33542 | Incus does not verify combined fingerprint when downloading images from simplestreams serv |
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-2026-41648
Incus: Unbounded YAML Metadata Decode via Parsing - CVE-2026-41647
Incus: Nil-Pointer Dereference via S3 Bucket Import - CVE-2026-40251
Incus out-of-bounds panic in snapshot metadata handling allo
Same vendor: lxc
- CVE-2026-41685
Incus: Unbounded binary import disk exhaustion - CVE-2026-41684
Incus: Nil Dereferences on Restore via Malformed YAML - CVE-2026-41648
Incus: Unbounded YAML Metadata Decode via Parsing - CVE-2026-41647
Incus: Nil-Pointer Dereference via S3 Bucket Import - CVE-2026-40251
Incus out-of-bounds panic in snapshot metadata handling allo
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
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