CVE-2026-98236

N/A

Published 2026-10-06 · Last modified 2026-10-19

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 7th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

—CVSS · not scored

No impact metrics

Proof of concept

No public PoC is currently catalogued.

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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot: 2026-10-26T13:52:32.101Z

Affected

Vendors Linux

Products Linux

Weakness (CWE)

Not classified.

CVSS vector

Not yet scored.

References and research data (JSON)

Vendor product assessments

Showing 32 of 277 vendor product statements; 245 omitted. Read the full vendor advisory.

kernel as a component of Red Hat Enterprise Linux 10 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-64k-modules as a component of Red Hat Enterprise Linux 10 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-64k-modules
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-debug-uki-virt as a component of Red Hat Enterprise Linux 10 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-debug-uki-virt
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-64k-debug-core as a component of Red Hat Enterprise Linux 10 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-rt-64k-debug-core
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 10 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-rt-debug-devel
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 10 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-tools-libs-devel
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
perf as a component of Red Hat Enterprise Linux 10 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/perf
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-64k-debug-modules as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-64k-debug-modules
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-core as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-core
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-debug-uki-virt-addons as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-debug-uki-virt-addons
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-64k as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-rt-64k
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-64k-devel as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-rt-64k-devel
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-rt-debug-devel-matched
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-rt-modules-internal
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-zfcpdump-modules as a component of Red Hat Enterprise Linux 9 · known affected

Vendor assessment for this product only.

pkg:rpm/redhat/kernel-zfcpdump-modules
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · known affected

Vendor assessment for this product only.

pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9
- none available: Affected
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel as a component of Red Hat Enterprise Linux 6 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-doc as a component of Red Hat Enterprise Linux 6 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-doc
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
perf as a component of Red Hat Enterprise Linux 6 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/perf
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-debug as a component of Red Hat Enterprise Linux 7 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-debug
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt as a component of Red Hat Enterprise Linux 7 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-rt
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-kvm as a component of Red Hat Enterprise Linux 7 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-rt-kvm
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-tools-libs as a component of Red Hat Enterprise Linux 7 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-tools-libs
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-debug-core as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-debug-core
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-doc as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-doc
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-rt
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-rt-debug-modules
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-rt-modules-internal
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-tools-libs-devel
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
kernel-zfcpdump-modules-internal as a component of Red Hat Enterprise Linux 8 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:rpm/redhat/kernel-zfcpdump-modules-internal
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · known not affected

Vendor assessment for this product only.
Reason: vulnerable code not present

pkg:oci/ose-rhel-coreos-8?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-8
Red Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00

References

Advisories

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98236.json vendor-advisoryRed Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93164 ADVISORYEUVD · EUVD-2026-93164

Technical & other

https://git.kernel.org/stable/c/650af68435eaee783824457d2ef78cc5c03c1e88CVE record · Linux · Updated 2026-10-19T09:16:08.044Z
NVD · CVE-2026-98236 · Updated 2026-10-19T10:18:24.437
https://git.kernel.org/stable/c/350fd3125ee26b5243935fd9e2b4d162ffba430aCVE record · Linux · Updated 2026-10-19T09:16:08.044Z
NVD · CVE-2026-98236 · Updated 2026-10-19T10:18:24.437
https://git.kernel.org/stable/c/dd136f1fdd1059f3bc25ede3a8def8f0ee151ce7CVE record · Linux · Updated 2026-10-19T09:16:08.044Z
NVD · CVE-2026-98236 · Updated 2026-10-19T10:18:24.437
https://git.kernel.org/stable/c/298659c3677bf622afa9d77549cb4a967f9541e9CVE record · Linux · Updated 2026-10-19T09:16:08.044Z
NVD · CVE-2026-98236 · Updated 2026-10-19T10:18:24.437
https://git.kernel.org/stable/c/02eba5f36d20283f144f75d47f0354a85e4f78f0CVE record · Linux · Updated 2026-10-19T09:16:08.044Z
NVD · CVE-2026-98236 · Updated 2026-10-19T10:18:24.437
https://git.kernel.org/stable/c/7e98216e9da08b79e07a514d2a4f7646f8c9ccb9CVE record · Linux · Updated 2026-10-19T09:16:08.044Z
NVD · CVE-2026-98236 · Updated 2026-10-19T10:18:24.437
https://git.kernel.org/stable/c/31550d585589fde1ae95bf7f7a8188b2d2fdf1c7CVE record · Linux · Updated 2026-10-19T09:16:08.044Z
NVD · CVE-2026-98236 · Updated 2026-10-19T10:18:24.437
https://access.redhat.com/security/cve/CVE-2026-98236 vendor-referenceRed Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
https://bugzilla.redhat.com/show_bug.cgi?id=2546497 vendor-referenceRed Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
https://www.cve.org/CVERecord?id=CVE-2026-98236 vendor-referenceRed Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
https://nvd.nist.gov/vuln/detail/CVE-2026-98236 vendor-referenceRed Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98236.mbox vendor-referenceRed Hat · CVE-2026-98236 · Updated 2026-10-09T16:45:22+00:00

Sources: NVD · CVE.org · EPSS