CVE-2026-45862

Summary

In the Linux kernel, the following vulnerability has been resolved:

iommu/vt-d: Flush cache for PASID table before using it

When writing the address of a freshly allocated zero-initialized PASID table to a PASID directory entry, do that after the CPU cache flush for this PASID table, not before it, to avoid the time window when this PASID table may be already used by non-coherent IOMMU hardware while its contents in RAM is still some random old data, not zero-initialized.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7e00b52c8cdd9d3a985d63d72ecae7bde6314883 < cd75e77125c8a51754ca4cd60b4ca083ed735d1daffected
LinuxLinux5c65f097124770c3e5b9b83ed1a8b68c119bc7b5 < 0616137b70e6d9a547d4b60df8e1b64e36d83661affected
LinuxLinux2bed9455db7cc0ab7ece6b3d846472097b52855a < 36990407cdd257473607e33802d00e978af2759eaffected
LinuxLinux194b3348bdbb7db65375c72f3f774aee4cc6614e < c93f23375d8c410954b0df825e814b632fd62b9daffected
LinuxLinux194b3348bdbb7db65375c72f3f774aee4cc6614e < 5962c30a6f05ea1ab73f039e235bb30716243517affected
LinuxLinux194b3348bdbb7db65375c72f3f774aee4cc6614e < 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16affected
LinuxLinux194b3348bdbb7db65375c72f3f774aee4cc6614e < d15cda135148ea7ba929cfdbcf208182bc29a7aaaffected
LinuxLinux194b3348bdbb7db65375c72f3f774aee4cc6614e < 22d169bdd2849fe6bd18c2643742e1c02be6451caffected
LinuxLinux1b48c70feefc499b62670521efa002ab01e05df5affected
LinuxLinuxbc348a6cc8f92e9979fbfbb3c6b48fd51b4b1dbfaffected
LinuxLinux5.10.175 < 5.10.252affected
LinuxLinux5.15.103 < 5.15.202affected
LinuxLinux6.1.16 < 6.1.165affected
LinuxLinux5.4.237 < 5.5affected
LinuxLinux6.2.3 < 6.3affected
LinuxLinux6.3affected
LinuxLinux0 < 6.3unaffected
LinuxLinux5.10.252 <= 5.10.*unaffected
LinuxLinux5.15.202 <= 5.15.*unaffected
LinuxLinux6.1.165 <= 6.1.*unaffected
LinuxLinux6.6.128 <= 6.6.*unaffected
LinuxLinux6.12.75 <= 6.12.*unaffected
LinuxLinux6.18.14 <= 6.18.*unaffected
LinuxLinux6.19.4 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References