{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-80891 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-80891 is a memory corruption vulnerability in Linux, published on 4 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-2026-80891 and fix it if it is affected.\n\nWhat it is: CVE-2026-80891 is a memory corruption vulnerability in Linux, published on 4 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-2026-80891 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-2026-80891/ (Markdown: https://insights.sbomify.com/CVE-2026-80891/index.md)","id":"CVE-2026-80891","markdown":"https://insights.sbomify.com/CVE-2026-80891/index.md","name":"CVE-2026-80891","record":{"aliases":["AZL-99477","BELL-CVE-2026-80891","DEBIAN-CVE-2026-80891","GHSA-4g2w-hpr2-f26j","UBUNTU-CVE-2026-80891"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel KVM","requires_auth":"low_privilege","summary":"A guest VM can trigger memory corruption in the Linux kernel KVM s390 PCI handler by providing invalid AIBV or AISB addresses, potentially leading to privilege escalation or denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"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\nKVM: s390: pci: Validate AIBV and AISB before pinning guest pages\n\nThe AIBV holds one bit per MSI-X vector for a given function. The size of\nthe bit vector is derived from the NOI and the AIBVO. If the size of the\nAIBV exceeds a single page boundary, then reject the request as we cannot\nsafely pin the guest AIBV.\n\nSimilarly reject the request if the AISB address is not 8-byte aligned as\nthe architecture requires doubleword alignment for the summary bit address.\nSince the AISBO can address up to 64 bits, the size of the AISB can only be\n8 bytes for the function. This also ensures the AISB doesn't exceed a\nsingle page boundary.","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":"KVM: s390: pci: Validate AIBV and AISB before pinning guest pages","id":"CVE-2026-80891","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"erofs: cap LZMA stream pool size","id":"CVE-2026-80892"},"packages":[],"prev":{"headline":"sctp: reject stale cookies with mismatched verification tags","id":"CVE-2026-80890"},"products":["Linux"],"published":"2026-09-04","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":"2026-09-04","vendors":["Linux"]},"summary":"A guest VM can trigger memory corruption in the Linux kernel KVM s390 PCI handler by providing invalid AIBV or AISB addresses, potentially leading to privilege escalation or denial of service.","url":"https://insights.sbomify.com/CVE-2026-80891/"}