Answer in brief
CVE-2026-98236 records a Unknown severity vulnerability in net: wwan: mhi_wwan_mbim: check skb_copy_bits() return value. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <650af68435eaee783824457d2ef78cc5c03c1e88 || >=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <350fd3125ee26b5243935fd9e2b4d162ffba430a || >=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7 || >=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <298659c3677bf622afa9d77549cb4a967f9541e9 || >=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <02eba5f36d20283f144f75d47f0354a85e4f78f0 || >=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <7e98216e9da08b79e07a514d2a4f7646f8c9ccb9 || >=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <31550d585589fde1ae95bf7f7a8188b2d2fdf1c7 | 650af68435eaee783824457d2ef78cc5c03c1e88, 350fd3125ee26b5243935fd9e2b4d162ffba430a, dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7, 298659c3677bf622afa9d77549cb4a967f9541e9, 02eba5f36d20283f144f75d47f0354a85e4f78f0, 7e98216e9da08b79e07a514d2a4f7646f8c9ccb9, 31550d585589fde1ae95bf7f7a8188b2d2fdf1c7 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.