{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-80956 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-80956 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-2026-80956 and fix it if it is affected.\n\nWhat it is: CVE-2026-80956 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-2026-80956 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-2026-80956/ (Markdown: https://insights.sbomify.com/CVE-2026-80956/index.md)","id":"CVE-2026-80956","markdown":"https://insights.sbomify.com/CVE-2026-80956/index.md","name":"CVE-2026-80956","record":{"aliases":["BELL-CVE-2026-80956","DEBIAN-CVE-2026-80956","GHSA-2r45-hwhh-3hc3","UBUNTU-CVE-2026-80956"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"none","summary":"A crafted disk image can cause a null pointer dereference in the Linux kernel dm-pcache module, leading to a system crash.","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\ndm-pcache: only hand out initialized cache segments\n\nget_cache_segment() scans the segment map up to cache-\u003en_segs, the\nphysical device segment count, but cache_segs_init() only initializes\nthe first cache_info-\u003en_segs segments. A crafted image with\ncache_info-\u003en_segs smaller than the device count leaves the remaining\npcache_cache_segment structs zeroed (segment.data == NULL), and the\nallocator can hand one to cache_kset_close(), which writes through the\nreturned segment's data pointer with no NULL check.\n\nBound the allocator's search to cache_info-\u003en_segs so only initialized\nsegments are ever returned. A conforming cache sets n_segs equal to the\ndevice segment count, so this rejects nothing legitimate.","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":"dm-pcache: only hand out initialized cache segments","id":"CVE-2026-80956","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"dm-pcache: detect a cycle in the last-kset chain during replay","id":"CVE-2026-80957"},"packages":[],"prev":{"headline":"dm-pcache: fix use-after-free and invalid seg operations in kset_replay()","id":"CVE-2026-80955"},"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":"2026-10-19","vendors":["Linux"]},"summary":"A crafted disk image can cause a null pointer dereference in the Linux kernel dm-pcache module, leading to a system crash.","url":"https://insights.sbomify.com/CVE-2026-80956/"}