RLSA-2026:94629: Important: dpdk security update
The dpdk packages provide the Data Plane Development Kit, which is a set of libraries and drivers for fast packet processing in the user space.
Security Fix(es):
dpdk: dpdk: Missing memory size validation before mmap in vhost memory region setup (CVE-2026-86561)
dpdk: dpdk: Control-queue descriptor double-fetch overflows host heap in DPDK vhost (VDUSE) (CVE-2026-86562)
dpdk: dpdk: Double offset bug in vhost log mapping calculation (CVE-2026-86563)
dpdk: dpdk: Guest can desynchronize virtqueue size from inflight descriptor table size, causing out-of-bounds write (CVE-2026-86565)
dpdk: dpdk: Guest with runt RX descriptors underflows copy length in vhost enqueue (split and packed rings) (CVE-2026-86566)
dpdk: dpdk: VDUSE handler fails to invalidate vring pointers when IOTLB is invalidated, leading to use-after-unmap (CVE-2026-86567)
dpdk: dpdk: Guest-triggered use-after-free and type confusion in vhost-crypto session cleanup (CVE-2026-86845)
dpdk: dpdk: Guest can trigger out-of-bounds write by controlling avail ring index in vhost-crypto (CVE-2026-86846)
dpdk: dpdk: Guest can trigger infinite loop in vhost-crypto writeback chain cleanup (CVE-2026-86847)
dpdk: dpdk: Time-of-check/time-of-use vulnerability allowing guest-triggered out-of-bounds write in vhost-crypto (CVE-2026-86848)
dpdk: dpdk: Integer overflow combined with missing validation leads to host buffer overflow in vhost-crypto (CVE-2026-86849)
dpdk: dpdk: Stack and heap buffer overflow in nfp vDPA driver (CVE-2026-86856)
dpdk: dpdk: Guest-triggered out-of-bounds walk via vhost indirect descriptor length TOCTOU (CVE-2026-93683)
dpdk: dpdk: heap out-of-bounds read/write in GSO header copy (CVE-2026-100236)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rocky-linux/dpdkto a version that resolves this vulnerability.Fixed in 2:25.11-2.el9_8
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Which deployments are most likely exposed to these issues?
The affected components described are DPDK vhost, VDUSE, and vhost-crypto paths. Deployments that use DPDK to provide vhost functionality to guests, including VDUSE or vhost-crypto use cases, are the ones identified by the advisory details.
What level of access does an attacker need?
The severity vector indicates local access and low privileges are required, with no user interaction. Several fixes specifically describe guest-controlled inputs, so a guest able to interact with the relevant DPDK vhost or vhost-crypto functionality may trigger the affected conditions.
What could successful exploitation cause?
The advisory lists buffer overflows, integer overflows, and use-after-free flaws. The severity vector rates confidentiality, integrity, and availability impact as high, and includes scope change.
How can I determine whether the update is relevant to my environment?
Check whether Rocky Linux systems have the dpdk packages installed and whether their DPDK deployment enables or uses vhost, VDUSE, or vhost-crypto functionality. The advisory does not provide affected or fixed package version numbers.