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CVE-2026-80715— igc: remove napi_synchronize() in igc_down()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于igc_down()函数中napi_synchronize()调用导致无限等待，当AF_XDP零拷贝应用被突然终止时，NAPI持续轮询，可能导致拒绝服务。

AI Predicted 3.1 Difficulty: Hard EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1603

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux fc9df2a0b520d7d439ecf464794d53e91be74b93< ad6e0df267dc96edb7de1fa0a2fb2a70645bff86 affected
fc9df2a0b520d7d439ecf464794d53e91be74b93< 605585a8d89aaeb0122e9016fdaa92376897a705 affected
fc9df2a0b520d7d439ecf464794d53e91be74b93< a0f16c337691813f8d8f014c01fff5a368e08898 affected
fc9df2a0b520d7d439ecf464794d53e91be74b93< f929a6fe5b7ae1e72d2c6d18cd69ab90dcf689d2 affected
fc9df2a0b520d7d439ecf464794d53e91be74b93< 3b5aee6fcbf6b58112d40d19c8d31fa3f78ee668 affected
fc9df2a0b520d7d439ecf464794d53e91be74b93< 9a2b637aef4e515c2179774888441d00e8a5ae95 affected
fc9df2a0b520d7d439ecf464794d53e91be74b93< 5ffab5b9589c50e4cfc0cf36ffd76c89422d4019 affected
5.14 affected
… +8 more rows
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I. Basic Information for CVE-2026-80715

Vulnerability Information
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Vulnerability Title
igc: remove napi_synchronize() in igc_down()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于igc_down()函数中napi_synchronize()调用导致无限等待，当AF_XDP零拷贝应用被突然终止时，NAPI持续轮询，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux fc9df2a0b520d7d439ecf464794d53e91be74b93 ~ ad6e0df267dc96edb7de1fa0a2fb2a70645bff86 -
Linux Linux 5.14 -

II. Public POCs for CVE-2026-80715

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III. Intelligence Information for CVE-2026-80715

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Patches & Fixes for CVE-2026-80715 (7)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80684 9.3 CRITICAL KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80721 8.8 HIGH Bluetooth: ISO: ensure no dangling hcon references in iso_conn
CVE-2026-80722 8.8 HIGH wifi: mac80211: validate individual TWT params before driver setup
CVE-2026-80724 8.8 HIGH ptp: vmclock: prevent read-only mappings from becoming writable

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80715

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