CVE-2026-80715: Linux kernel · igc: remove napi_synchronize() in igc_down()
Source GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
Description
In the Linux kernel, the following vulnerability has been resolved: igc: remove napi_synchronize() in igc_down() When an AF_XDP zero-copy application is killed abruptly, the XSK pool is torn down but NAPI keeps polling. igc_clean_rx_irq_zc() then returns the full budget on every poll, so napi_complete_done() never clears NAPI_STATE_SCHED. igc_down() calls napi_synchronize() before napi_disable(), so it spins forever waiting for that bit and the interface never goes down. Drop the napi_synchronize() and let napi_disable() do the job -- it sets NAPI_STATE_DISABLE, which forces the stuck poll to complete. Reorder it ahead of igc_set_queue_napi() so the NAPI mapping is cleared only after polling has stopped, matching the recent igb fix b1e067240379.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80715 (opens in a new tab)
- git.kernel.org/stable/c/3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668 (opens in a new tab)
- git.kernel.org/stable/c/5ffab5b9589c50e4cfc0cf36ffd76c89422d4019 (opens in a new tab)
- git.kernel.org/stable/c/605585a8d89aaeb0122e9016fdaa92376897a705 (opens in a new tab)
- git.kernel.org/stable/c/9a2b637aef4e515c2179774888441d00e8a5ae95 (opens in a new tab)
- git.kernel.org/stable/c/a0f16c337691813f8d8f014c01fff5a368e08898 (opens in a new tab)
- git.kernel.org/stable/c/ad6e0df267dc96edb7de1fa0a2fb2a70645bff86 (opens in a new tab)
- git.kernel.org/stable/c/f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2 (opens in a new tab)