{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89560 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89560 is a high-severity missing authorization vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-89560 and fix it if it is affected.\n\nWhat it is: CVE-2026-89560 is a high-severity missing authorization vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-89560 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-89560/ (Markdown: https://insights.sbomify.com/CVE-2026-89560/index.md)","id":"CVE-2026-89560","markdown":"https://insights.sbomify.com/CVE-2026-89560/index.md","name":"CVE-2026-89560","record":{"aliases":["AZL-100692","BELL-CVE-2026-89560","DEBIAN-CVE-2026-89560","GHSA-r9r3-96fh-8fhv","UBUNTU-CVE-2026-89560"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel Landlock","requires_auth":"low_privilege","summary":"An attacker can bypass Landlock filesystem restrictions to create whiteout objects via renameat2 or mknod, circumventing intended access controls.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":8.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlandlock: Require LANDLOCK_ACCESS_FS_MAKE_REG for whiteout creation\n\nWhiteout objects are used in the upper layer of an OverlayFS to\nindicate that the file with this name does not exist in the unified\nview, even if it is present in one of the lower layer file systems.\n\nFor the userspace implementations of OverlayFS (fuse-overlayfs),\nwhiteout objects can be created from userspace as well:\n\n* mknod(2) with S_IFCHR and makedev(0, 0)\n* renameat2(2) with RENAME_WHITEOUT,\n  creating the whiteout in the old place of the moved file.\n\nThis commit guards whiteout creation in both of these cases with\nLANDLOCK_ACCESS_FS_MAKE_REG.  Whiteout objects are *not* considered\ncharacter devices and are not bound to a driver.\n\nLANDLOCK_ACCESS_FS_MAKE_REG describes the same permission class as a\nwhiteout object: creating one is the only S_IFCHR creation that the VFS\nexempts from CAP_MKNOD, so it is as unprivileged as creating a regular\nfile, while LANDLOCK_ACCESS_FS_MAKE_CHAR and\nLANDLOCK_ACCESS_FS_MAKE_BLOCK keep meaning the creation of devices that\nexpose a kernel interface [1].\n\nFor the mknod(2) case, introduce a Landlock erratum.  The creation of\nwhiteout objects through mknod(2) was previously guarded using\nLANDLOCK_ACCESS_FS_MAKE_CHAR, and it is now guarded using\nLANDLOCK_ACCESS_FS_MAKE_REG.\n\nFor the renameat2(2) case, fix a bug: Before this commit, renameat2(2)\nwith RENAME_WHITEOUT would create a directory entry even when all\nLANDLOCK_ACCESS_FS_MAKE_* rights were denied.\n\nThis does not affect normal renames within layered OverlayFS mounts:\nWhen doing a regular rename() on a mounted fuse-overlayfs, it is the\nfuse-overlayfs daemon that exercises renameat2() with RENAME_WHITEOUT,\nand only the Landlock domain of that daemon is checked there.\n\nDepends-on: 49c9e09d9610 (\"landlock: Fix handling of disconnected directories\")\nDepends-on: fe72ce6710cb (\"landlock: Add errata documentation section\")\n[mic: Record why LANDLOCK_ACCESS_FS_MAKE_REG is the matching right, and\nadd link(2) to the user doc]","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"landlock: Require LANDLOCK_ACCESS_FS_MAKE_REG for whiteout creation","id":"CVE-2026-89560","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"ipv6: rpl: fix NULL dereference of idev in ipv6_rpl_srh_rcv()","id":"CVE-2026-89561"},"packages":[],"prev":{"headline":"libnvdimm/labels: Prevent integer overflow in __nd_label_validate()","id":"CVE-2026-89559"},"products":["Linux"],"published":"2026-09-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"An attacker can bypass Landlock filesystem restrictions to create whiteout objects via renameat2 or mknod, circumventing intended access controls.","url":"https://insights.sbomify.com/CVE-2026-89560/"}