{"id":"CVE-2026-80715","state":"PUBLISHED","title":"igc: remove napi_synchronize() in igc_down()","description":"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_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.","publishedAt":"2026-08-28T06:53:13.683Z","updatedAt":"2026-08-28T06:53:13.683Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"ad6e0df267dc96edb7de1fa0a2fb2a70645bff86","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"605585a8d89aaeb0122e9016fdaa92376897a705","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"a0f16c337691813f8d8f014c01fff5a368e08898","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"9a2b637aef4e515c2179774888441d00e8a5ae95","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"5ffab5b9589c50e4cfc0cf36ffd76c89422d4019","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/intel/igc/igc_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"5.15.217","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.184","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.153","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.105","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/intel/igc/igc_main.c"]}],"references":["https://git.kernel.org/stable/c/ad6e0df267dc96edb7de1fa0a2fb2a70645bff86","https://git.kernel.org/stable/c/605585a8d89aaeb0122e9016fdaa92376897a705","https://git.kernel.org/stable/c/a0f16c337691813f8d8f014c01fff5a368e08898","https://git.kernel.org/stable/c/f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2","https://git.kernel.org/stable/c/3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668","https://git.kernel.org/stable/c/9a2b637aef4e515c2179774888441d00e8a5ae95","https://git.kernel.org/stable/c/5ffab5b9589c50e4cfc0cf36ffd76c89422d4019"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80715.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80715","state":"PUBLISHED","datePublished":"2026-08-28T06:53:13.683Z","dateUpdated":"2026-08-28T06:53:13.683Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.788Z"},"containers":{"cna":{"title":"igc: remove napi_synchronize() in igc_down()","descriptions":[{"lang":"en","value":"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_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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"ad6e0df267dc96edb7de1fa0a2fb2a70645bff86","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"605585a8d89aaeb0122e9016fdaa92376897a705","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"a0f16c337691813f8d8f014c01fff5a368e08898","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"9a2b637aef4e515c2179774888441d00e8a5ae95","versionType":"git"},{"version":"fc9df2a0b520d7d439ecf464794d53e91be74b93","status":"affected","lessThan":"5ffab5b9589c50e4cfc0cf36ffd76c89422d4019","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/intel/igc/igc_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.14","versionType":"semver"},{"version":"5.15.217","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.184","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.153","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.105","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/intel/igc/igc_main.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-28T06:53:13.683Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"5.15.217"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.1.184"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.6.153"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.12.105"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}