CVE-2026-72329
Linux net/liquidio driver stale VF pci_dev deref allows host kernel crash or escalation.
Is CVE-2026-72329 being exploited?
Not confirmed. CVE-2026-72329 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-72329?
CVE-2026-72329 is rated Critical. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-72329?
Yes. A fix has been recorded for CVE-2026-72329. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72329 affect?
CVE-2026-72329 affects Linux kernel (net/liquidio driver), Marvell/Cavium LiquidIO SR-IOV NICs, Hosts using SR-IOV PF with OCTEON VFs, Virtualized environments with VF passthrough. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72329?
Apply vendor/kernel patch immediately; if not possible disable SR-IOV or unbind LiquidIO VFs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
A malicious SR-IOV VF mailbox request can dereference a stale VF pci_dev, causing host kernel crash (DoS) and potential privilege escalation/host compromise.
Immediate action required
- affected>= ca6139ffc67ee6ef0459f81e37894ed411083855 and < 81acef3a247fd523513a2e9f71de1c167bc0f882
- affected>= ca6139ffc67ee6ef0459f81e37894ed411083855 and < 5c0e3ba4f500fd4314ceb42f07f16bc445156431
- affected4.10
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.