https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 11:35:17 +0000 https://vulnerability.circl.lu/vuln/cve-2026-89450 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>iommu/tegra241-cmdqv: Reject a vSID wider than the SID_MATCH field</p> <p>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.</p> <p>The bound check rejects only virt_sid &gt; UINT_MAX, which admits a value far wider than the field. The write &#34;virt_sid &lt;&lt; 1 | 0x1&#34; 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-&gt;virt_id is guest-controlled, a VMM can trigger it.</p> <p>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.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>iommu/tegra241-cmdqv: Reject a vSID wider than the SID_MATCH field</p> <p>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.</p> <p>The bound check rejects only virt_sid &gt; UINT_MAX, which admits a value far wider than the field. The write &#34;virt_sid &lt;&lt; 1 | 0x1&#34; 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-&gt;virt_id is guest-controlled, a VMM can trigger it.</p> <p>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.</p> https://vulnerability.circl.lu/vuln/cve-2026-89450