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CVE-2026-98237— net: wwan: mhi_wwan_mbim: guard against a cyclic NDP chain

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，以下漏洞已修复： net: wwan: mhi_wwan_mbim: 防范循环 NDP 链 mhi_mbim_rx() 中的 NDP（Network Data Packet，网络数据包）遍历仅在 wNextNdpIndex 为零时才会停止。由于没有任何要求使偏移量递增，如果调制解调器（modem）将某个 NDP 指向自身或指向之前的 NDP，会导致循环在一个 CPU 核心上无限自旋。 当检测到下一个 NDP 的偏移量不大于当前偏移量时，跳出循环。 在 QEMU 虚拟机中进行了验证：通过故障注

AI Predicted 5.9 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 3ed36ee1b29b028f6bc2ebe100152f61a33df05a affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< e4b2c7b50d4f4aa1ddfff731b136d65f65b2b526 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 19b5e8dd884a530d04482e1a8e547f43cad17ed7 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 24ade82d6d993274e99c2c6998848751c35292e7 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 8dad70ff7e25cbcfbcb5101fdbf36d98003eb653 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 829fec45122da58d77a55a3b7ca514dafab98e77 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 5d063822ac5184939c1ed377a339a01d8ae814e8 affected
5.15 affected
… +8 more rows
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I. Basic Information for CVE-2026-98237

Vulnerability Information
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Vulnerability Title
net: wwan: mhi_wwan_mbim: guard against a cyclic NDP chain
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: wwan: mhi_wwan_mbim: guard against a cyclic NDP chain The NDP traversal in mhi_mbim_rx() only stops when wNextNdpIndex is zero. Nothing requires the offsets to advance, so a modem that points an NDP at itself, or at an earlier NDP, keeps the loop spinning forever on one CPU. Break out when the next NDP offset is not larger than the current one. Verified in a QEMU guest with a fault injector feeding the driver's receive callback an NTB whose single NDP points at itself: the unpatched driver spins in mhi_mbim_rx() with one CPU pinned at 100% and the thread never returns. With this check the loop terminates within one iteration. Changes in v2: move the non-increasing check to the wNextNdpIndex retrieval site, as suggested by Loic Poulain, instead of tracking the previous offset in a separate variable.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux aa730a9905b7b079ef2fffdab7f15dbb842f5c7c ~ 3ed36ee1b29b028f6bc2ebe100152f61a33df05a -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-98237

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III. Intelligence Information for CVE-2026-98237

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Patches & Fixes for CVE-2026-98237 (7)

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-2026-98324 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
CVE-2026-98254 7.8 HIGH swiotlb: use the adjusted address for the highmem page lookup

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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