{"answers":{"affected":"5 open source packages ship an affected version, including github.com/lxc/incus/v7/cmd/incusd, github.com/lxc/incus and github.com/lxc/incus/v6.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48754 exists.","fix":"Upgrade github.com/lxc/incus/v7/cmd/incusd to 7.1.0 or later.","what":"CVE-2026-48754 is a low-severity vulnerability in lxc incus, published on 21 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-48754 and fix it if it is affected.\n\nWhat it is: CVE-2026-48754 is a low-severity vulnerability in lxc incus, published on 21 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48754 exists.\n\nAffected packages and fixed versions:\n- github.com/lxc/incus/v7/cmd/incusd (Go): affected all versions; fixed in 7.1.0\n- github.com/lxc/incus/v7/cmd/incusd (Go): affected all versions; fixed in 7.1.0\n- github.com/lxc/incus (Go): affected all versions; no fix listed\n- github.com/lxc/incus/v6 (Go): affected all versions; no fix listed\n- github.com/lxc/incus/v7 (Go): affected all versions; fixed in 7.1.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-48754/ (Markdown: https://insights.sbomify.com/CVE-2026-48754/index.md)","id":"CVE-2026-48754","markdown":"https://insights.sbomify.com/CVE-2026-48754/index.md","name":"CVE-2026-48754","record":{"aliases":["DEBIAN-CVE-2026-48754","GHSA-4xg6-52mh-fpw8","GO-2026-5800","UBUNTU-CVE-2026-48754"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Incus container manager","requires_auth":"low_privilege","summary":"An authenticated user can crash the Incus daemon by uploading a malformed backup tarball, causing a denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":2.1,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"Incus is a system container and virtual machine manager. Prior to version 7.1.0, `(*backend).createDependentVolumesFromBackup` in `internal/server/storage/backend.go` contains a cluster of unguarded pointer derefs on every dependent-volume entry's `VolumeSnapshots[i]`, `Volume`, and `Pool` sub-fields. An authenticated user with `can_create_instances` permission on any project can crash the `incusd` daemon by uploading an instance backup tarball whose `dependent_volumes[*]` block contains a nil snapshot pointer (or omits `volume:` / `pool:`). This is a sibling-field variant of the 2026-05-04 batch fix `d768f81c0a1d985f35ae56219519822b080bf5e3` (\"Properly check dependent volumes on import\"). That commit added `if disk == nil` at the top of the outer loop, but did not guard the four sub-pointer fields the loop body dereferences naked. Version 7.1.0 contains an updated patch.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Incus: Nil-pointer dereference in createDependentVolumesFromBackup on disk.{Volume,VolumeSnapshots,Pool}","id":"CVE-2026-48754","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":5,"n_references":1,"next":{"headline":"Incus has an argument injection in backup compression algorithm leading to AFW and ACE","id":"CVE-2026-48755"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus","purl":"pkg:golang/github.com/lxc/incus","source":"GO-2026-5800"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v6","purl":"pkg:golang/github.com/lxc/incus/v6","source":"GO-2026-5800"},{"ecosystem":"Go","fixed":["7.1.0"],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v7","purl":"pkg:golang/github.com/lxc/incus/v7","source":"GO-2026-5800"},{"ecosystem":"Go","fixed":["7.1.0"],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v7/cmd/incusd","purl":null,"source":"GHSA-4xg6-52mh-fpw8"},{"ecosystem":"Go","fixed":["7.1.0"],"introduced":["0"],"last_affected":[],"package":"github.com/lxc/incus/v7/cmd/incusd","purl":"pkg:golang/github.com/lxc/incus/v7/cmd/incusd","source":"GHSA-4xg6-52mh-fpw8"}],"prev":{"headline":"Incus has an arbitrary file write via path traversal in S3 multipart upload","id":"CVE-2026-48753"},"products":["incus"],"published":"2026-08-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-26","vendors":["lxc"]},"summary":"An authenticated user can crash the Incus daemon by uploading a malformed backup tarball, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-48754/"}