Answer in brief
CVE-2026-64106 records a Unknown severity vulnerability in KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-64106 records a Unknown severity vulnerability in KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=57a9a117154c93539e33161dd318e6aeb8c04efa <1716b7fea2ead941a0dfac06c4504a3437cdf00d || >=57a9a117154c93539e33161dd318e6aeb8c04efa <dab9f93251b2c86a033de6098d0c73afddd55d4a || >=57a9a117154c93539e33161dd318e6aeb8c04efa <b94538186a3eae3763b8f96dacd610920a865aa7 || >=57a9a117154c93539e33161dd318e6aeb8c04efa <0680f511926589206f81f57f76ce131d7741a316 || >=57a9a117154c93539e33161dd318e6aeb8c04efa <8bcd15b690a390241179516af1b6ae49ebfd9d95 || >=57a9a117154c93539e33161dd318e6aeb8c04efa <9ce754ed8e7ab4e3999767ce1505f85c449ccb07 | 1716b7fea2ead941a0dfac06c4504a3437cdf00d, dab9f93251b2c86a033de6098d0c73afddd55d4a, b94538186a3eae3763b8f96dacd610920a865aa7, 0680f511926589206f81f57f76ce131d7741a316, 8bcd15b690a390241179516af1b6ae49ebfd9d95, 9ce754ed8e7ab4e3999767ce1505f85c449ccb07 |
| Linux/Linuxgeneric | 4.12 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=57a9a117154c93539e33161dd318e6aeb8c04efa <1716b7fea2ead941a0dfac06c4504a3437cdf00d || >=57a9a117154c93539e33161dd318e6aeb8c04efa <dab9f93251b2c86a033de6098d0c73afddd55d4a || >=57a9a117154c93539e33161dd318e6aeb8c04efa <b94538186a3eae3763b8f96dacd610920a865aa7 || >=57a9a117154c93539e33161dd318e6aeb8c04efa <0680f511926589206f81f57f76ce131d7741a316 || >=57a9a117154c93539e33161dd318e6aeb8c04efa <8bcd15b690a390241179516af1b6ae49ebfd9d95 || >=57a9a117154c93539e33161dd318e6aeb8c04efa <9ce754ed8e7ab4e3999767ce1505f85c449ccb07 | 1716b7fea2ead941a0dfac06c4504a3437cdf00d, dab9f93251b2c86a033de6098d0c73afddd55d4a, b94538186a3eae3763b8f96dacd610920a865aa7, 0680f511926589206f81f57f76ce131d7741a316, 8bcd15b690a390241179516af1b6ae49ebfd9d95, 9ce754ed8e7ab4e3999767ce1505f85c449ccb07 |
| Linux/Linuxgeneric | 4.12 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.