Quick answers
- Is CVE-2026-93683 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-93683 being exploited in the wild.
- How severe is CVE-2026-93683?
- Medium severity, with a CVSS score of 6.4, published 14 October 2026.
- Which products and versions are affected?
- DPDK versions prior to the fix in RHSA-2026:94629.
- Is there a fix for CVE-2026-93683?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-93683 attacked?
- It is attacked from the adjacent network, in a software library.
- Am I affected by CVE-2026-93683?
- Check whether you run DPDK at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A time-of-check/time-of-use (TOCTOU) vulnerability exists in the vhost library's handling of virtio indirect descriptor tables: the host reads the table length from guest memory, allocates a host copy, then reads the length again—allowing a malicious guest to change the length between reads or supply an out-of-range index. This causes the vhost process to walk past validated memory boundaries. An attacker with guest-level access can crash or disrupt the vhost process; no payload is returned to the guest, but out-of-bounds bytes are consumed as descriptor fields for address translation.
Affected products
- DPDK DPDK versions prior to the fix in RHSA-2026:94629
Timeline
- 2026-10-14: disclosed
- 2026-11-03: advisory: Red Hat RHSA-2026:94629 security update issued