{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89562 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89562 is a high-severity 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-2026-89562 and fix it if it is affected.\n\nWhat it is: CVE-2026-89562 is a high-severity 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-2026-89562 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-2026-89562/ (Markdown: https://insights.sbomify.com/CVE-2026-89562/index.md)","id":"CVE-2026-89562","markdown":"https://insights.sbomify.com/CVE-2026-89562/index.md","name":"CVE-2026-89562","record":{"aliases":["AZL-100340","BELL-CVE-2026-89562","DEBIAN-CVE-2026-89562","GHSA-672h-29w5-4fj2","UBUNTU-CVE-2026-89562"],"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":"low_privilege","summary":"Incorrect hardware header length calculation in Linux kernel ip6_gre NBMA tunnels can lead to network instability or denial of service.","user_interaction":"not_required","vuln_class":"other"},"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\nip6_gre: fix hardware header length for NBMA tunnels\n\nip6gre_tnl_link_config_route() accumulates the lower device's hardware\nheader length into dev-\u003ehard_header_len whenever header_ops is set. This\nis incorrect for both users of header_ops.\n\nip6gretap and ip6erspan have a fixed Ethernet hardware header length.\nFor an NBMA ip6gre tunnel, ip6gre_header() creates only the GRE header,\nthe optional FOU or GUE header, and the outer IPv6 header. The lower\ndevice header is headroom needed later, not part of the tunnel device's\nhardware header.\n\nKeep the lower device header in needed_headroom. Set hard_header_len to\nthe tunnel header length only for ARPHRD_IP6GRE devices with header_ops,\nand leave the fixed Ethernet header length unchanged for tap and erspan\ndevices.","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":"ip6_gre: fix hardware header length for NBMA tunnels","id":"CVE-2026-89562","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"ip6_tunnel: use skb_cow_head() in ip6_tnl_xmit()","id":"CVE-2026-89563"},"packages":[],"prev":{"headline":"ipv6: rpl: fix NULL dereference of idev in ipv6_rpl_srh_rcv()","id":"CVE-2026-89561"},"products":["Linux"],"published":"2026-09-11","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":"2026-10-19","vendors":["Linux"]},"summary":"Incorrect hardware header length calculation in Linux kernel ip6_gre NBMA tunnels can lead to network instability or denial of service.","url":"https://insights.sbomify.com/CVE-2026-89562/"}