{"id":"CVE-2026-98966","kind":"vulnerability","aliases":["CVE-2026-98966"],"related":[],"title":"Linux kernel: bonding driver leaks XDP programs when replaced","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: fix the program leak when XDP is replaced\n\nWe need to release the reference on the old BPF prog, whether\nwe are going to no-prog, or replacing the prog with another.\n\nSpotted by AI while running tests for the propagation series\n(leaked programs were accumulating). Selftest will come in\nthe net-next series to avoid conflicts.","summary":"When an XDP program on a Linux bonding device is replaced or removed, the kernel fails to release the reference to the old BPF program. Leaked programs accumulate in memory over repeated attachments.","severity":"unknown","cvss":null,"epss":0.00198,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["bonding","infrastructure","linux","xdp"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-23T13:17:18+00:00","first_seen_at":"2026-10-23T21:57:33+00:00","triaged_at":"2026-10-25T04:56:29+00:00","updated_at":"2026-10-25T12:38:50+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-25T04:56:29Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Linux kernel: bonding driver leaks XDP programs when replaced","impact":"low","summary":"When an XDP program on a Linux bonding device is replaced or removed, the kernel fails to release the reference to the old BPF program. Leaked programs accumulate in memory over repeated attachments.","category":"infrastructure","nicknames":[],"who_cares":["linux","bonding","xdp"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Kernel memory leaks from accumulating unreleased BPF programs","analyst_note":"Check the NVD entry and the upstream kernel commit for affected kernel version ranges and the fixed stable release.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"low"},"cost_usd":0.000498,"input_tokens":3343,"output_tokens":327,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':11A,14A '-98966':12A,15A 'accumul':47B,110C 'ai':99C 'anoth':96C 'attach':52B 'avoid':121C 'bond':3A,16B,27B,63C 'bpf':43B,81C 'come':113C 'conflict':122C 'cve':10A,13A 'devic':28B 'driver':4A 'fail':35B 'fix':64C 'follow':58C 'go':86C 'infrastructur':17B 'kernel':2A,34B,56C 'leak':5A,45B,67C,107C 'linux':1A,18B,26B,55C 'memori':49B 'need':73C 'net':117C 'net-next':116C 'next':118C 'no-prog':88C 'old':42B,80C 'prog':82C,90C,94C 'program':7A,23B,44B,46B,66C,108C 'propag':105C 'refer':39B,77C 'releas':37B,75C 'remov':32B 'repeat':51B 'replac':9A,30B,71C,92C 'resolv':62C 'run':101C 'selftest':111C 'seri':106C,119C 'spot':97C 'test':102C 'vulner':59C 'whether':83C 'xdp':6A,19B,22B,69C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-23T13:17:18+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-98966","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98966","severity":null,"published_at":"2026-10-23T13:17:18+00:00","modified_at":"2026-10-23T13:17:18+00:00","first_seen_at":"2026-10-23T21:57:33+00:00","fetched_at":"2026-10-23T22:29:03+00:00","note":null},{"source":"epss","external_id":"CVE-2026-98966","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98966","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-25T12:38:50+00:00","fetched_at":"2026-10-25T12:38:50+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}