{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-71128 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-71128 is a high-severity vulnerability in Linux kernel, published on 14 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-71128 and fix it if it is affected.\n\nWhat it is: CVE-2025-71128 is a high-severity vulnerability in Linux kernel, published on 14 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-71128 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2025-71128/ (Markdown: https://insights.sbomify.com/CVE-2025-71128/index.md)","id":"CVE-2025-71128","markdown":"https://insights.sbomify.com/CVE-2025-71128/index.md","name":"CVE-2025-71128","record":{"aliases":["BELL-CVE-2025-71128","DEBIAN-CVE-2025-71128","GHSA-2c5j-c82g-5hg6","UBUNTU-CVE-2025-71128"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Linux kernel","requires_auth":"none","summary":"A missing initialization in Linux kernel ERSPAN handling causes a kernel panic via FORTIFY_SOURCE checks, leading to denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-665","name":"Improper Initialization"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerspan: Initialize options_len before referencing options.\n\nThe struct ip_tunnel_info has a flexible array member named\noptions that is protected by a counted_by(options_len)\nattribute.\n\nThe compiler will use this information to enforce runtime bounds\nchecking deployed by FORTIFY_SOURCE string helpers.\n\nAs laid out in the GCC documentation, the counter must be\ninitialized before the first reference to the flexible array\nmember.\n\nAfter scanning through the files that use struct ip_tunnel_info\nand also refer to options or options_len, it appears the normal\ncase is to use the ip_tunnel_info_opts_set() helper.\n\nSaid helper would initialize options_len properly before copying\ndata into options, however in the GRE ERSPAN code a partial\nupdate is done, preventing the use of the helper function.\n\nBefore this change the handling of ERSPAN traffic in GRE tunnels\nwould cause a kernel panic when the kernel is compiled with\nGCC 15+ and having FORTIFY_SOURCE configured:\n\nmemcpy: detected buffer overflow: 4 byte write of buffer size 0\n\nCall Trace:\n \u003cIRQ\u003e\n __fortify_panic+0xd/0xf\n erspan_rcv.cold+0x68/0x83\n ? ip_route_input_slow+0x816/0x9d0\n gre_rcv+0x1b2/0x1c0\n gre_rcv+0x8e/0x100\n ? raw_v4_input+0x2a0/0x2b0\n ip_protocol_deliver_rcu+0x1ea/0x210\n ip_local_deliver_finish+0x86/0x110\n ip_local_deliver+0x65/0x110\n ? ip_rcv_finish_core+0xd6/0x360\n ip_rcv+0x186/0x1a0\n\nReported-at: https://launchpad.net/bugs/2129580","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":"erspan: Initialize options_len before referencing options.","id":"CVE-2025-71128","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2025"},"n_packages":0,"n_references":2,"next":{"headline":"LoongArch: BPF: Sign extend kfunc call arguments","id":"CVE-2025-71129"},"packages":[],"prev":{"headline":"wifi: mac80211: Discard Beacon frames to non-broadcast address","id":"CVE-2025-71127"},"products":["Linux"],"published":"2026-01-14","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A missing initialization in Linux kernel ERSPAN handling causes a kernel panic via FORTIFY_SOURCE checks, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2025-71128/"}