{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98921 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-98921 is a vulnerability in Linux, published on 23 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-98921 and fix it if it is affected.\n\nWhat it is: CVE-2026-98921 is a vulnerability in Linux, published on 23 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-98921 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-2026-98921/ (Markdown: https://insights.sbomify.com/CVE-2026-98921/index.md)","id":"CVE-2026-98921","markdown":"https://insights.sbomify.com/CVE-2026-98921/index.md","name":"CVE-2026-98921","record":{"aliases":["DEBIAN-CVE-2026-98921","GHSA-5m82-wc7w-682w","UBUNTU-CVE-2026-98921"],"analysis":null,"analysis_generated_by":null,"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\novl: fix UAF in ovl_do_mkdir() debug print\n\novl_do_mkdir() prints the input dentry with %pd after vfs_mkdir().\nSince commit fe497f0759e0 (\"VFS: change vfs_mkdir() to unlock on\nfailure.\"), vfs_mkdir() calls end_creating() on the input dentry on\nfailure and may replace it on success, so the post-call %pd can\nuse-after-free the dentry when CONFIG_OVERLAY_FS_DEBUG is enabled.\n\nPrint the dentry before the call and only the result afterward.","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":"ovl: fix UAF in ovl_do_mkdir() debug print","id":"CVE-2026-98921","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"net: emac: move setting of netops to fix crash","id":"CVE-2026-98922"},"packages":[],"prev":{"headline":"netfs: Fix missing alloc tagging of direct mempool allocations","id":"CVE-2026-98920"},"products":["Linux"],"published":"2026-10-23","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":"2026-10-23","vendors":["Linux"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-98921/"}