CVE-2026-98311— wifi: virt_wifi: don't transfer operstate before register
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.
在 Linux 内核中，已修复以下漏洞： wifi: virt_wifi：不要在注册前传输操作状态 在调用 之前调用了 。如果底层设备处于休眠状态，这会将新的网络设备排队到 ，而此时该设备仍处于未初始化状态。如果随后的注册失败（例如，因为名称无效，如 "bad/name"）， 会立即释放该对象。随后 会对该链表条目造成使用后释放（use-after-free）漏洞。 将操作状态的转移移至 之后进行，与 macvlan 和 ipvlan 的处理方式保持一致。
Possible ATT&CK Techniques 1 AI
T1206Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c7cdba31ed8b87526db978976392802d3f93110c< ee9ea1afd6990def51d52b3a0aecd5cfcc951da0 |
affected |
c7cdba31ed8b87526db978976392802d3f93110c< 9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225 |
affected | ||
c7cdba31ed8b87526db978976392802d3f93110c< f9526054c2b2cace5916b7225603d008834ec011 |
affected | ||
c7cdba31ed8b87526db978976392802d3f93110c< e8304e25c6dabb8accf38b807969438d0ce84fd7 |
affected | ||
c7cdba31ed8b87526db978976392802d3f93110c< ca49763c42c1089d654bf11b037980a9ede3772c |
affected | ||
c7cdba31ed8b87526db978976392802d3f93110c< 293c56a66510bb7de073a1aba388e38abddff1fb |
affected | ||
c7cdba31ed8b87526db978976392802d3f93110c< b808a9af5fd21f9c68b0d024eda7535b5dce6a4e |
affected | ||
c7cdba31ed8b87526db978976392802d3f93110c< e5c8d7acd31b27057ea42cd405d0b3ece097bc89 |
affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-98311
Vulnerability Information
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Vulnerability Title
wifi: virt_wifi: don't transfer operstate before register
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: virt_wifi: don't transfer operstate before register
virt_wifi_newlink() calls netif_stacked_transfer_operstate() before
register_netdevice(). If the lower device is dormant, that queues the
new netdev on lweventlist while it is still uninitialized. If
registration fails after that, for example because of an invalid name
such as "bad/name", free_netdev() immediately frees the object. A
later linkwatch_fire_event() then use-after-frees the list entry.
Move the transfer to after netdev_upper_dev_link(), as macvlan and
ipvlan already do.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-98311
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-98311 (8)
Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total
| CVE-2026-98323 | 9.8 CRITICAL | RDMA/siw: Bound fragmented header copies by the remaining length |
| CVE-2026-98365 | 9.8 CRITICAL | RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access |
| CVE-2026-98282 | 8.8 HIGH | powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba |
| CVE-2026-98283 | 8.8 HIGH | KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid() |
| CVE-2026-98339 | 8.8 HIGH | wifi: cfg80211: don't filter by BSS type when removing stale entries |
| CVE-2026-98171 | 8.8 HIGH | smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs |
| CVE-2026-98261 | 8.1 HIGH | cifs: Fix server use-after-free in cifs_chan_skip_or_disable() |
| CVE-2026-98357 | 8.1 HIGH | IB/isert: wait for deferred control PDU completions before releasing the connection |
| CVE-2026-98239 | 8.1 HIGH | net: lan743x: fix RX checksum use-after-free |
| CVE-2026-98305 | 7.8 HIGH | net: dsa: mxl862xx: disable the stats poll on teardown |
| CVE-2026-98341 | 7.8 HIGH | wifi: cfg80211: don't free driver-owned scan requests |
| CVE-2026-98320 | 7.8 HIGH | netfilter: flowtable: hold reference on ct until flow is released |
| CVE-2026-98228 | 7.8 HIGH | mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ |
| CVE-2026-98229 | 7.8 HIGH | xfrm: save input state data before secpath resets |
| CVE-2026-98318 | 7.8 HIGH | smb: client: validate absolute native symlink targets before NT fixups |
| CVE-2026-98315 | 7.8 HIGH | ntfs: protect runlist updates with the runlist lock |
| CVE-2026-98276 | 7.8 HIGH | net: lock the socket in sock_gettstamp() |
| CVE-2026-98258 | 7.8 HIGH | posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list |
| CVE-2026-98260 | 7.8 HIGH | exec: Cleanup POSIX timers right after de_thread() |
| CVE-2026-98256 | 7.8 HIGH | signal: Prevent exec() race |
Showing top 20 of 208 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98374
tcp: fix use-after-free of retransmit_skb_hint in tcp_send_s -
CVE-2026-98373
mm/hugetlb: preserve mremap address delta when skipping page -
CVE-2026-98372
xfrm: iptfs: fix stack OOB read in iptfs_skb_reset_frag_walk -
CVE-2026-98371
xfrm: iptfs: fix runt reassembly panic from short inner tot_ -
CVE-2026-98370
xfrm: fix compat ALLOCSPI request use-after-free
Same vendor: Linux
-
CVE-2026-98374
tcp: fix use-after-free of retransmit_skb_hint in tcp_send_s -
CVE-2026-98373
mm/hugetlb: preserve mremap address delta when skipping page -
CVE-2026-98372
xfrm: iptfs: fix stack OOB read in iptfs_skb_reset_frag_walk -
CVE-2026-98371
xfrm: iptfs: fix runt reassembly panic from short inner tot_ -
CVE-2026-98370
xfrm: fix compat ALLOCSPI request use-after-free
V. Comments for CVE-2026-98311
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