{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-80638 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-80638 is a high-severity memory corruption vulnerability in Linux, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-80638 and fix it if it is affected.\n\nWhat it is: CVE-2026-80638 is a high-severity memory corruption vulnerability in Linux, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-80638 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-2026-80638/ (Markdown: https://insights.sbomify.com/CVE-2026-80638/index.md)","id":"CVE-2026-80638","markdown":"https://insights.sbomify.com/CVE-2026-80638/index.md","name":"CVE-2026-80638","record":{"aliases":["DEBIAN-CVE-2026-80638","GHSA-pf3v-qrvc-chw5","UBUNTU-CVE-2026-80638"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"An out-of-bounds write in the OCFS2 filesystem allows attackers to cause a kernel panic or potentially execute code via crafted file operations.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/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\nocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent\n\n[BUG]\nUnlinking a refcounted file whose refcount tree has leaf blocks\ntriggers a fortify panic due to an out-of-bounds write.\n\n[CAUSE]\nWhen the last leaf block is removed from a refcount tree,\nocfs2_remove_refcount_extent() converts the root back to leaf mode\nwith a bulk memset on \u0026rb-\u003erf_records. rf_records sits in an anonymous\nunion with rf_list. rf_list.l_tree_depth aliases rf_records.rl_count,\nand is 0 for a single-level tree. With rl_count equal to 0, the memset\nwrites past the 16-byte declared size of rf_records, which the fortify\nchecker catches.\n\n[FIX]\nReplace the bulk memset on \u0026rb-\u003erf_records with a correctly-bounded\nmemset on rl_recs[] alone, after setting rl_count to the correct value.","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":"ocfs2: fix out-of-bounds write in ocfs2_remove_refcount_extent","id":"CVE-2026-80638","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"cxl/test: Fix __fortify_panic","id":"CVE-2026-80639"},"packages":[],"prev":{"headline":"netfilter: synproxy: fix unaligned memory access in timestamp adjustment","id":"CVE-2026-80637"},"products":["Linux"],"published":"2026-08-28","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":"2026-08-29","vendors":["Linux"]},"summary":"An out-of-bounds write in the OCFS2 filesystem allows attackers to cause a kernel panic or potentially execute code via crafted file operations.","url":"https://insights.sbomify.com/CVE-2026-80638/"}