{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2023-54062 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-54062 is a high-severity use after free vulnerability in Linux, published on 24 Dec 2025. 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-2023-54062 and fix it if it is affected.\n\nWhat it is: CVE-2023-54062 is a high-severity use after free vulnerability in Linux, published on 24 Dec 2025. 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-2023-54062 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-2023-54062/ (Markdown: https://insights.sbomify.com/CVE-2023-54062/index.md)","id":"CVE-2023-54062","markdown":"https://insights.sbomify.com/CVE-2023-54062/index.md","name":"CVE-2023-54062","record":{"aliases":["BELL-CVE-2023-54062","DEBIAN-CVE-2023-54062","GHSA-3m76-cj86-mwp4","UBUNTU-CVE-2023-54062"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel ext4","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel ext4 filesystem allows attackers to cause denial of service or potentially execute code via crafted extended attributes.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix invalid free tracking in ext4_xattr_move_to_block()\n\nIn ext4_xattr_move_to_block(), the value of the extended attribute\nwhich we need to move to an external block may be allocated by\nkvmalloc() if the value is stored in an external inode.  So at the end\nof the function the code tried to check if this was the case by\ntesting entry-\u003ee_value_inum.\n\nHowever, at this point, the pointer to the xattr entry is no longer\nvalid, because it was removed from the original location where it had\nbeen stored.  So we could end up calling kvfree() on a pointer which\nwas not allocated by kvmalloc(); or we could also potentially leak\nmemory by not freeing the buffer when it should be freed.  Fix this by\nstoring whether it should be freed in a separate variable.","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":"ext4: fix invalid free tracking in ext4_xattr_move_to_block()","id":"CVE-2023-54062","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2023"},"n_packages":0,"n_references":9,"next":{"headline":"fs/ntfs3: Fix OOB read in indx_insert_into_buffer","id":"CVE-2023-54063"},"packages":[],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2023-54061"},"products":["Linux"],"published":"2025-12-24","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel ext4 filesystem allows attackers to cause denial of service or potentially execute code via crafted extended attributes.","url":"https://insights.sbomify.com/CVE-2023-54062/"}