CVE-2026-74495
Linux igbvf driver off-by-one DMA cleanup bug leaks a DMA mapping, enabling kernel resource exhaustion.
Is CVE-2026-74495 being exploited?
Not confirmed. CVE-2026-74495 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 0.51% probability of exploitation in the next 30 days.
How severe is CVE-2026-74495?
CVE-2026-74495 is rated Critical with a CVSS score of 9.8. 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-2026-74495?
Yes. A fix has been recorded for CVE-2026-74495. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74495 affect?
CVE-2026-74495 affects Linux kernel - igbvf network driver, Hosts using Intel SR-IOV Virtual Functions (VF), Virtualized guests with igbvf passthrough. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74495?
Apply vendor/kernel update or driver backport that fixes igbvf DMA cleanup.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Off-by-one in TX DMA error cleanup leaks a DMA mapping per failure, enabling resource exhaustion and potential kernel DoS.
Patch when possible
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < e42b7225c45f57b42306b80cdd3bda202bae7293
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < e3ed89c257f6361f13df23023cd10ace830330ad
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < 56726ff12cb6759ab90d6f5332c2377aeca7d249
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < 31089f4eab42e0fc248ec80c26f9b0bad59ba4cc
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < bc25d56c03e41c10bc4b40e99ca5d7b941675c04
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < 845a9cdd9b03b7b6fa8de3ee80579780350a7f65
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < df07003b5a6c6c9fce60d765d6a3da815a74c41c
- affected>= c1fa347f20f17f14a4a1575727fa24340e8a9117 and < 0565052b7e2f436b7f1541f4849da96dc0aa7a0e
- affected2.6.33
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.