Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-98236— net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value

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： net: wwan: mhi_wwan_mbim：检查 skb_copy_bits() 的返回值 函数在从 NTB（Non-Transparent Bridge，非透明桥接）复制每个数据报时，忽略了 的返回值。数据报的偏移量和长度来自 DPE（Data Packet Entry，数据包条目），而 DPE 仅被检查是否位于 NTB 内部范围，因此调制解调器（modem）可能将数据报指向接收到的 （socket buffer，套接字缓冲区）之外的位置。 此时，复制操作会失败，但

AI Predicted 6.6 Difficulty: Moderate EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1030 · Data Transfer Size Limits

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 650af68435eaee783824457d2ef78cc5c03c1e88 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 350fd3125ee26b5243935fd9e2b4d162ffba430a affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 298659c3677bf622afa9d77549cb4a967f9541e9 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 02eba5f36d20283f144f75d47f0354a85e4f78f0 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 7e98216e9da08b79e07a514d2a4f7646f8c9ccb9 affected
aa730a9905b7b079ef2fffdab7f15dbb842f5c7c< 31550d585589fde1ae95bf7f7a8188b2d2fdf1c7 affected
5.15 affected
… +8 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-98236

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value mhi_mbim_rx() ignores the return value of skb_copy_bits() when it copies each datagram out of the NTB. The datagram offset and length come from the DPE, which is only checked to lie within the NTB itself, so a modem can point a datagram outside the received skb. The copy then fails and the freshly allocated skbn is passed to netif_rx() with its uninitialized contents still in place, leaking kernel heap memory into the network stack. Free the skb and account an error when the copy fails. Verified in a QEMU guest with a fault injector pointing a DPE outside the received NTB: the copy fails, and the unpatched driver hands the uninitialized skbn to the network stack (observed as "unknown protocol" on bytes that were never written). With this check the failed datagram is dropped and counted as an rx error. Changes in v2: factor the free-and-count sequence out into mhi_mbim_rx_drop(), shared with the unknown-protocol path, as suggested by Loic Poulain.
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 ~ 650af68435eaee783824457d2ef78cc5c03c1e88 -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-98236

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-98236

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-98236 (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

V. Comments for CVE-2026-98236

No comments yet

Leave a comment