CVE-2026-64106
Linux Kernel vulnerability
- Published19 Jul 2026
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that state, but vgic_its_restore_dte() accepts it and stores the out-of-range value in dev->num_eventid_bits. Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before allocating the device. This mirrors the MAPD check and prevents the restored state from reaching vgic_its_restore_itt(), where the unchecked value can be converted into an oversized scan_its_table() range.
CVSS 3.1 breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:HAffected products
Remediation
- https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316
- https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d
- https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95
- https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07
- https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7
- https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a
References
- https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316
- https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d
- https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95
- https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07
- https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7
- https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a
Frequently asked
Is CVE-2026-64106 being actively exploited?
CVE-2026-64106 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.19%.
How severe is CVE-2026-64106?
CVE-2026-64106 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 0.19% probability of exploitation.
Which products are affected by CVE-2026-64106?
Affected products include Linux Kernel.
How do I fix CVE-2026-64106?
Upgrade affected software to a fixed version, for example Linux Kernel 6.1.175 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-64106 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.