CVE-2026-74309
Linux kernel vdpa/octeon_ep IRQ mapping bug may allow kernel crash or exploitation
Is CVE-2026-74309 being exploited?
Not confirmed. CVE-2026-74309 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 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-74309?
CVE-2026-74309 is rated Critical with a CVSS score of 10.0. 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-2026-74309?
Yes. A fix has been recorded for CVE-2026-74309. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74309 affect?
CVE-2026-74309 affects Linux kernel (vdpa/octeon_ep driver), Marvell Octeon vDPA endpoint devices, Virtualization hosts using vDPA-enabled NICs. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74309?
Apply vendor/kernel security update and reboot affected systems.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Incorrect IRQ-to-ring mapping can cause kernel panic (DoS), packet corruption, and may enable privilege escalation or code execution on affected hosts.
Immediate action required
- affected>= 26f8ce06af6475b33b0bc60261e9f5027f9af58f and < 3ef0cfa77a3d526591be069850d186c255e3f0cc
- affected>= 26f8ce06af6475b33b0bc60261e9f5027f9af58f and < c6c7eae5de798442987619434171ac886035d57c
- affected>= 26f8ce06af6475b33b0bc60261e9f5027f9af58f and < 0d21a1d6375a05274291e32c1ab7cd57dbb69513
- affected6.14
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.