{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-68457 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-68457 is a critical vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-68457 and fix it if it is affected.\n\nWhat it is: CVE-2026-68457 is a critical vulnerability in Linux, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-68457 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-2026-68457/ (Markdown: https://insights.sbomify.com/CVE-2026-68457/index.md)","id":"CVE-2026-68457","markdown":"https://insights.sbomify.com/CVE-2026-68457/index.md","name":"CVE-2026-68457","record":{"aliases":["BELL-CVE-2026-68457","DEBIAN-CVE-2026-68457","GHSA-j57w-wqmx-67hp","UBUNTU-CVE-2026-68457"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel ksmbd","requires_auth":"none","summary":"Attackers can bypass permission checks on SMB file operations by exploiting credential mishandling in the ksmbd kernel module.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: use opener credentials for FSCTL mutations\n\nSET_SPARSE, SET_ZERO_DATA and SET_COMPRESSION operate on an open SMB\nhandle but call VFS xattr, fallocate or fileattr helpers with the current\nksmbd worker credentials. Those helpers can revalidate inode permissions,\nownership and LSM policy independently of the SMB handle access mask.\n\nRun each operation with the credentials captured in the target file when\nthe handle was opened. Keep credential handling local to these single-file\nFSCTLs rather than applying session credentials to the complete IOCTL\nhandler, which also contains handle-less and multi-handle operations.","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":"ksmbd: use opener credentials for FSCTL mutations","id":"CVE-2026-68457","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"privilege_escalation","year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"binder: cache secctx size before release zeroes it","id":"CVE-2026-68458"},"packages":[],"prev":{"headline":"usb: atm: ueagle-atm: wait for pre-firmware load in .disconnect()","id":"CVE-2026-68456"},"products":["Linux"],"published":"2026-08-15","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":"2026-08-18","vendors":["Linux"]},"summary":"Attackers can bypass permission checks on SMB file operations by exploiting credential mishandling in the ksmbd kernel module.","url":"https://insights.sbomify.com/CVE-2026-68457/"}