CVE-2026-89450

CVE CVE-2026-89450EUVD EUVD-2026-76356Published 2026-09-11T19:43:16.000ZLast changed 2026-09-13T06:29:30.000ZCVSS 8.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: iommu/tegra241-cmdqv: Reject a vSID wider than the SID_MATCH field tegra241_vintf_init_vsid() programs the guest-provided vSID into SID_MATCH, whose VIRT_SID field spans bits [20:1] with bit 0 as the match-enable flag. The HW therefore matches only a 20-bit Stream ID. The bound check rejects only virt_sid > UINT_MAX, which admits a value far wider than the field. The write "virt_sid << 1 | 0x1" then drops every bit above 20: a virt_sid of 0x80000000 lands as SID_MATCH = 0x1, a valid match on vSID 0, so the entry aliases the wrong Stream ID. Because vdev->virt_id is guest-controlled, a VMM can trigger it. Validate virt_sid against the field width with FIELD_MAX(), and program the register with FIELD_PREP() so the value and the field stay consistent.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.17; 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 <4379610c79bd88ddbea10e7f6c21e16d4b338c6b; 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 <d903d99ffd22b0180bd745a43f221c21bcdd8d7c; patch: 0; patch: 7.2.4; patch: 7.3-rc1; 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 <445204550f894ca325ac80a21e3df177ad073798; patch: 6.18.50

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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