RLSA-2026:94630: 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.el10_2
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Which DPDK deployments are most directly implicated by the listed fixes?
The fixes specifically concern DPDK vhost functionality, including VDUSE and vhost-crypto paths. Environments using DPDK to provide or handle virtqueue, guest-memory, or vhost-crypto operations are the most directly relevant to this advisory.
What level of access does an attacker need?
Several listed issues are explicitly guest-triggerable, including flaws involving virtqueue sizing, RX descriptors, and vhost-crypto rings. The CVSS vector also indicates local attack access, low privileges, and no user interaction.
What is the potential impact if exploitation succeeds?
The advisory rates the update high severity with high confidentiality, integrity, and availability impact. Listed flaw types include out-of-bounds writes, heap overflow, use-after-free, type confusion, and an infinite loop, which could affect the host-side DPDK process.