CVE-2026-98236: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-98236DEBIAN-CVE-2026-98236
Published 06-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-98236 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.1% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.18%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:12131-1

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

06-10-202621-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.113-1 | < 7.2.8-1
Linux1 product
  • linux≥ aa730a9905b7b079ef2fffdab7f15dbb842f5c7c, < 650af68435eaee783824457d2ef78cc5c03c1e88 | ≥ aa730a9905b7b079ef2fffdab7f15dbb842f5c7c, < 350fd3125ee26b5243935fd9e2b4d162ffba430a | ≥ aa730a9905b7b079ef2fffdab7f15dbb842f5c7c, < dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7 | ≥ aa730a9905b7b079ef2fffdab7f15dbb842f5c7c, < 298659c3677bf622afa9d77549cb4a967f9541e9 | ≥ aa730a9905b7b079ef2fffdab7f15dbb842f5c7c, < 02eba5f36d20283f144f75d47f0354a85e4f78f0 | ≥ aa730a9905b7b079ef2fffdab7f15dbb842f5c7c, < 7e98216e9da08b79e07a514d2a4f7646f8c9ccb9 | ≥ aa730a9905b7b079ef2fffdab7f15dbb842f5c7c, < 31550d585589fde1ae95bf7f7a8188b2d2fdf1c7 | 5.15

3 vendors · 159 products

References

11 links
Show all 11 references