{"id":"CVE-2026-45862","title":"iommu/vt-d: Flush cache for PASID table before using it","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Flush cache for PASID table before using it\n\nWhen writing the address of a freshly allocated zero-initialized PASID\ntable to a PASID directory entry, do tha…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 7e00b52c8cdd9d3a985d63d72ecae7bde6314883 < cd75e77125c8a51754ca4cd60b4ca083ed735d1d","Linux >= 5c65f097124770c3e5b9b83ed1a8b68c119bc7b5 < 0616137b70e6d9a547d4b60df8e1b64e36d83661","Linux >= 2bed9455db7cc0ab7ece6b3d846472097b52855a < 36990407cdd257473607e33802d00e978af2759e","Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < c93f23375d8c410954b0df825e814b632fd62b9d","Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < 5962c30a6f05ea1ab73f039e235bb30716243517","Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16","Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < d15cda135148ea7ba929cfdbcf208182bc29a7aa","Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < 22d169bdd2849fe6bd18c2643742e1c02be6451c","Linux 1b48c70feefc499b62670521efa002ab01e05df5","Linux bc348a6cc8f92e9979fbfbb3c6b48fd51b4b1dbf","Linux >= 5.10.175 < 5.10.252","Linux >= 5.15.103 < 5.15.202","Linux >= 6.1.16 < 6.1.165","Linux >= 5.4.237 < 5.5","Linux >= 6.2.3 < 6.3","Linux 6.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:18:13.638562Z"},"published":"2026-05-27","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:20:46.048Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-45862","references":[{"url":"https://git.kernel.org/stable/c/cd75e77125c8a51754ca4cd60b4ca083ed735d1d"},{"url":"https://git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661"},{"url":"https://git.kernel.org/stable/c/36990407cdd257473607e33802d00e978af2759e"},{"url":"https://git.kernel.org/stable/c/c93f23375d8c410954b0df825e814b632fd62b9d"},{"url":"https://git.kernel.org/stable/c/5962c30a6f05ea1ab73f039e235bb30716243517"},{"url":"https://git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16"},{"url":"https://git.kernel.org/stable/c/d15cda135148ea7ba929cfdbcf208182bc29a7aa"},{"url":"https://git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c"}],"tags":["cve.org"],"epss":0.00156,"epssPercentile":0.04271,"ingestedAt":"2026-10-16T17:24:46.700Z","slug":"CVE-2026-45862","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Flush cache for PASID table before using it\n\nWhen writing the address of a freshly allocated zero-initialized PASID\ntable to a PASID directory entry, do that after the CPU cache flush for\nthis PASID table, not before it, to avoid the time window when this\nPASID table may be already used by non-coherent IOMMU hardware while\nits contents in RAM is still some random old data, not zero-initialized.\n\n## Affected\n\n- `Linux >= 7e00b52c8cdd9d3a985d63d72ecae7bde6314883 < cd75e77125c8a51754ca4cd60b4ca083ed735d1d`\n- `Linux >= 5c65f097124770c3e5b9b83ed1a8b68c119bc7b5 < 0616137b70e6d9a547d4b60df8e1b64e36d83661`\n- `Linux >= 2bed9455db7cc0ab7ece6b3d846472097b52855a < 36990407cdd257473607e33802d00e978af2759e`\n- `Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < c93f23375d8c410954b0df825e814b632fd62b9d`\n- `Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < 5962c30a6f05ea1ab73f039e235bb30716243517`\n- `Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16`\n- `Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < d15cda135148ea7ba929cfdbcf208182bc29a7aa`\n- `Linux >= 194b3348bdbb7db65375c72f3f774aee4cc6614e < 22d169bdd2849fe6bd18c2643742e1c02be6451c`\n- `Linux 1b48c70feefc499b62670521efa002ab01e05df5`\n- `Linux bc348a6cc8f92e9979fbfbb3c6b48fd51b4b1dbf`\n- `Linux >= 5.10.175 < 5.10.252`\n- `Linux >= 5.15.103 < 5.15.202`\n- `Linux >= 6.1.16 < 6.1.165`\n- `Linux >= 5.4.237 < 5.5`\n- `Linux >= 6.2.3 < 6.3`\n- `Linux 6.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}