01 Record

CVE-2026-64106

KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits

CriticalPUBLISHEDCNA: Linux

CNA base score9.0 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H

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02 Description

KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.14% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 4.0% of scored records. A rank, not a probability.

NVD base score

9.0 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-19.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-07-19 15:40Z3 MO AGO

Last updated

2026-10-19 20:28Z9 DAYS AGO

Reserved

2026-07-19

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.0)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H

Weaknesses

CWE-20Improper Input ValidationClass

Data version

5.2

Document digest

2d31087a33c25399e176f55878c5d99ecf64efa5018ac4b0b32b9c55a0b0dfb5

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux57a9a117154c93539e33161dd318e6aeb8c04efa to < 1716b7fea2ead941a0dfac06c4504a3437cdf00d, 57a9a117154c93539e33161dd318e6aeb8c04efa to < dab9f93251b2c86a033de6098d0c73afddd55d4a, 57a9a117154c93539e33161dd318e6aeb8c04efa to < b94538186a3eae3763b8f96dacd610920a865aa7, 57a9a117154c93539e33161dd318e6aeb8c04efa to < 0680f511926589206f81f57f76ce131d7741a316, 57a9a117154c93539e33161dd318e6aeb8c04efa to < 8bcd15b690a390241179516af1b6ae49ebfd9d95, 57a9a117154c93539e33161dd318e6aeb8c04efa to < 9ce754ed8e7ab4e3999767ce1505f85c449ccb07, 4.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d
git.kernel.orghttps://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a
git.kernel.orghttps://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7
git.kernel.orghttps://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316
git.kernel.orghttps://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95
git.kernel.orghttps://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07

07 Fixed in

Debian 12

linux
Fixed in 6.1.176-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.94-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.0.12-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.