CVE-2026-100236

Dpdk: dpdk: heap out-of-bounds read/write in gso header copy

publishedCWE-787

A flaw was found in the DPDK GSO library. When software GSO copies packet headers into a new mbuf, it does not check that the header fits in the source first segment or in the destination buffer, and a header longer than the configured GSO segment size can underflow the payload-size calculation. A remote or guest-supplied packet processed with software GSO can trigger an out-of-bounds read or write.

Technical severity8.6 highCVSS 3.1 · CNA: redhat

Published2026-10-14Source updated 2026-11-03

Collected2026-11-033 attributed sources

Fixes and workarounds

Workaround

Do not run software GSO (rte_gso_segment / testpmd --enable-gso) on untrusted packets. Size direct_pool larger than the max header (~208 B tunneled). That does not fully cover the short-first-segment over-read.

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Enterprise Linux 10 Red Hat `dpdk` https://access.redhat.com/downloads/content/package-browser/	≥ 2:25.11-2.el10_2; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `dpdk` https://access.redhat.com/downloads/content/package-browser/	≥ 2:25.11-2.el9_8; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Fast Datapath for RHEL 10 Red Hat `grout` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 10 Red Hat `openvswitch3.5` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 10 Red Hat `openvswitch3.6` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 8 Red Hat `openvswitch2.11` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 8 Red Hat `openvswitch2.12` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 8 Red Hat `openvswitch2.13` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 8 Red Hat `openvswitch2.15` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 8 Red Hat `openvswitch2.16` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 8 Red Hat `openvswitch2.17` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 8 Red Hat `openvswitch3.1` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `grout` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch2.17` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch3.0` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch3.1` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch3.2` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch3.3` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch3.4` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch3.5` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Fast Datapath for RHEL 9 Red Hat `openvswitch3.6` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8 Red Hat `dpdk` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openvswitch2.17` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openvswitch3.0` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenShift Container Platform 4 Red Hat `openvswitch3.1` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	CNA: redhat
Red Hat OpenStack Platform 13 (Queens) Red Hat `openvswitch` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 8.6 high	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`	CNA: redhat
3.1 / 8.6 high	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H`	NVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2026:94629CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:94630CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-100236CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2541488CNA: redhat · issue-tracking, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-100236[email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2541488[email protected]

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