{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89642 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89642 is a 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-2026-89642 and fix it if it is affected.\n\nWhat it is: CVE-2026-89642 is a 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-2026-89642 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-2026-89642/ (Markdown: https://insights.sbomify.com/CVE-2026-89642/index.md)","id":"CVE-2026-89642","markdown":"https://insights.sbomify.com/CVE-2026-89642/index.md","name":"CVE-2026-89642","record":{"aliases":["AZL-100884","BELL-CVE-2026-89642","DEBIAN-CVE-2026-89642","GHSA-cjwf-376p-qpm9","UBUNTU-CVE-2026-89642"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["data_read"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel CIFS","requires_auth":"low_privilege","summary":"A local attacker can read stale memory data from the page cache when extending a CIFS file size, potentially exposing sensitive information.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: call pagecache_isize_extended() in cifs_setsize() when extending\n\ncifs_setsize() calls truncate_pagecache() but skips\npagecache_isize_extended() on extension.  truncate_setsize() shows\nthe correct pattern:\n\n  i_size_write(inode, newsize);\n  if (newsize \u003e oldsize)\n      pagecache_isize_extended(inode, oldsize, newsize);\n  truncate_pagecache(inode, newsize);\n\npagecache_isize_extended() zeroes the tail of the page straddling old\nEOF.  Without it, dirty bytes in that region can be written back to\nthe server, exposing stale data in the newly extended range.","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":"cifs: call pagecache_isize_extended() in cifs_setsize() when extending","id":"CVE-2026-89642","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"audit: avoid dropping live tree ref on fsnotify rule autoremove","id":"CVE-2026-89643"},"packages":[],"prev":{"headline":"cifs: clear tcon after cifsFileInfo_put() in cifs_file_set_size()","id":"CVE-2026-89641"},"products":["Linux"],"published":"2026-09-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Linux"]},"summary":"A local attacker can read stale memory data from the page cache when extending a CIFS file size, potentially exposing sensitive information.","url":"https://insights.sbomify.com/CVE-2026-89642/"}