{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-72377 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-72377 is a vulnerability in Linux, published on 15 Aug 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-2026-72377 and fix it if it is affected.\n\nWhat it is: CVE-2026-72377 is a vulnerability in Linux, published on 15 Aug 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-2026-72377 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-2026-72377/ (Markdown: https://insights.sbomify.com/CVE-2026-72377/index.md)","id":"CVE-2026-72377","markdown":"https://insights.sbomify.com/CVE-2026-72377/index.md","name":"CVE-2026-72377","record":{"aliases":["BELL-CVE-2026-72377","DEBIAN-CVE-2026-72377","GHSA-jw6q-qfr2-5f75","UBUNTU-CVE-2026-72377"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"none","summary":"A null pointer dereference in the Linux kernel AFS filesystem can cause a denial of service when accessing symlinks or mountpoints with fscache enabled.","user_interaction":"not_required","vuln_class":"null_dereference"},"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\nafs: Remove setting of AS_RELEASE_ALWAYS for symlinks and mountpoints\n\nRegular AFS files correctly use afs_file_aops which have release_folio\nset as netfs_release_folio, so AS_RELEASE_ALWAYS is valid for them\nwhen fscache is enabled (set via afs_vnode_set_cache()).\nSymlinks and mountpoints in AFS use afs_dir_aops, which does not provide\na release_folio callback. However, afs_apply_status() unconditionally\ncalls mapping_set_release_always() for these.\n\nIn such case when memory management code attempts to release folios,\nfilemap_release_folio() checks folio_needs_release() which\nreturns true due to AS_RELEASE_ALWAYS being set. Since there is no\nrelease_folio callback, it falls through to try_to_free_buffers(),\nwhich at present expects buffer_heads to be not null. For symlinks\nand mountpoints without buffer_heads, this causes pointer dereference.\n\n[dh: Added more bits that were missed]","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":"afs: Remove setting of AS_RELEASE_ALWAYS for symlinks and mountpoints","id":"CVE-2026-72377","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"afs: Fix error code in afs_extract_vl_addrs()","id":"CVE-2026-72378"},"packages":[],"prev":{"headline":"afs: Fix misplaced inc of net-\u003ecells_outstanding","id":"CVE-2026-72376"},"products":["Linux"],"published":"2026-08-15","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":"2026-08-17","vendors":["Linux"]},"summary":"A null pointer dereference in the Linux kernel AFS filesystem can cause a denial of service when accessing symlinks or mountpoints with fscache enabled.","url":"https://insights.sbomify.com/CVE-2026-72377/"}