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CVE-2026-98359— RDMA/core: Reject unregistering netdevs in ib_get_eth_speed

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，以下漏洞已得到修复： RDMA/core：在 中拒绝注销网络设备的操作 有意返回一个引用计数增加的网络设备（net_device），即使该设备正处于注销过程中。这样，匹配和清理阶段的调用者仍能找到该关联。此引用确保 结构体保持分配状态，但并不保证该设备仍处于正常运行状态。 通过调用设备的 ethtool 回调来使用该设备。尽管该调用是在持有 RTNL（路由网锁）的情况下进行的，但函数并未首先验证设备的注册状态。因此，异步 RDMA 端口查询可能在设备完成 和 之后，仍访问到已注销的网络设备。

CVSS 7.0 · High EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux d41861942fc55c14b6280d9568a0d0112037f065< be4b44c8b47c67a04c08b1a0aba18006b749ae6a affected
d41861942fc55c14b6280d9568a0d0112037f065< 45c60ffc79771bad154f224a05753191cf1b37bc affected
d41861942fc55c14b6280d9568a0d0112037f065< 520cd057f138ed8dbe8e05f0eae3a8ed4c5d3a5e affected
d41861942fc55c14b6280d9568a0d0112037f065< a219459fbd1b2598e63c81a52847eba6c28b72d2 affected
d41861942fc55c14b6280d9568a0d0112037f065< 5bd42f74ec3b4f4687fb600f367af0828d513b3c affected
d41861942fc55c14b6280d9568a0d0112037f065< ef9fbe1b93f3b617b96e86d5cd76b3fa44514cb5 affected
4.14 affected
< 4.14 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-98359

Vulnerability Information
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Vulnerability Title
RDMA/core: Reject unregistering netdevs in ib_get_eth_speed
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Reject unregistering netdevs in ib_get_eth_speed ib_device_get_netdev() intentionally returns a referenced net_device even when it is unregistering, so matching and cleanup callers can still find the association. The reference keeps struct net_device allocated, but does not guarantee that the device remains operational. ib_get_eth_speed() uses the returned device operationally by invoking its ethtool callback. Although that call is made under RTNL, the function does not verify the registration state first. An asynchronous RDMA port query can therefore call into a netdev after NETDEV_UNREGISTER and ndo_uninit have completed. Check for NETREG_REGISTERED while holding RTNL and return -ENODEV for a device which is being unregistered. Keeping RTNL across the check and the ethtool operation prevents unregister from starting between them. Keep the speed fallback and warning under RTNL as well, so the warning can safely read netdev->name. Drop the netdev reference before releasing RTNL once all accesses to the device are complete.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/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

Vendor Product Affected Versions CPE Subscribe
Linux Linux d41861942fc55c14b6280d9568a0d0112037f065 ~ be4b44c8b47c67a04c08b1a0aba18006b749ae6a -
Linux Linux 4.14 -

II. Public POCs for CVE-2026-98359

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III. Intelligence Information for CVE-2026-98359

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Patches & Fixes for CVE-2026-98359 (6)

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-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98281 7.8 HIGH futex: Also allocate private hash on vfork()
CVE-2026-98324 7.8 HIGH dmaengine: pxa: fix double counting of the hw descriptors
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-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98359

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