{"id":"CVE-2026-80715","title":"igc: remove napi_synchronize() in igc_down()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nigc: remove napi_synchronize() in igc_down()\n\nWhen an AF_XDP zero-copy application is killed abruptly, the XSK pool is\ntorn down but NAPI keeps polling. igc_clean_rx_ir…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < ad6e0df267dc96edb7de1fa0a2fb2a70645bff86","Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 605585a8d89aaeb0122e9016fdaa92376897a705","Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < a0f16c337691813f8d8f014c01fff5a368e08898","Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2","Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668","Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 9a2b637aef4e515c2179774888441d00e8a5ae95","Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 5ffab5b9589c50e4cfc0cf36ffd76c89422d4019","Linux 5.14"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T17:02:51.220627Z"},"published":"2026-08-28","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:05:53.246Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80715","references":[{"url":"https://git.kernel.org/stable/c/ad6e0df267dc96edb7de1fa0a2fb2a70645bff86"},{"url":"https://git.kernel.org/stable/c/605585a8d89aaeb0122e9016fdaa92376897a705"},{"url":"https://git.kernel.org/stable/c/a0f16c337691813f8d8f014c01fff5a368e08898"},{"url":"https://git.kernel.org/stable/c/f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2"},{"url":"https://git.kernel.org/stable/c/3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668"},{"url":"https://git.kernel.org/stable/c/9a2b637aef4e515c2179774888441d00e8a5ae95"},{"url":"https://git.kernel.org/stable/c/5ffab5b9589c50e4cfc0cf36ffd76c89422d4019"}],"tags":["cve.org"],"epss":0.00161,"epssPercentile":0.05293,"ingestedAt":"2026-11-06T18:00:12.535Z","slug":"CVE-2026-80715","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nigc: remove napi_synchronize() in igc_down()\n\nWhen an AF_XDP zero-copy application is killed abruptly, the XSK pool is\ntorn down but NAPI keeps polling. igc_clean_rx_irq_zc() then returns the\nfull budget on every poll, so napi_complete_done() never clears\nNAPI_STATE_SCHED.\n\nigc_down() calls napi_synchronize() before napi_disable(), so it spins\nforever waiting for that bit and the interface never goes down. Drop the\nnapi_synchronize() and let napi_disable() do the job -- it sets\nNAPI_STATE_DISABLE, which forces the stuck poll to complete. Reorder it\nahead of igc_set_queue_napi() so the NAPI mapping is cleared only after\npolling has stopped, matching the recent igb fix b1e067240379.\n\n## Affected\n\n- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < ad6e0df267dc96edb7de1fa0a2fb2a70645bff86`\n- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 605585a8d89aaeb0122e9016fdaa92376897a705`\n- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < a0f16c337691813f8d8f014c01fff5a368e08898`\n- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2`\n- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668`\n- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 9a2b637aef4e515c2179774888441d00e8a5ae95`\n- `Linux >= fc9df2a0b520d7d439ecf464794d53e91be74b93 < 5ffab5b9589c50e4cfc0cf36ffd76c89422d4019`\n- `Linux 5.14`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}