CVE-2026-45862

Description

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.

CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0015

Probability of exploitation

0.04%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661 https://git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c https://git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16 https://git.kernel.org/stable/c/36990407cdd257473607e33802d00e978af2759e https://git.kernel.org/stable/c/5962c30a6f05ea1ab73f039e235bb30716243517 https://git.kernel.org/stable/c/c93f23375d8c410954b0df825e814b632fd62b9d https://git.kernel.org/stable/c/cd75e77125c8a51754ca4cd60b4ca083ed735d1d https://git.kernel.org/stable/c/d15cda135148ea7ba929cfdbcf208182bc29a7aa

Frequently Asked Questions

What is CVE-2026-45862? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-45862? +

CVE-2026-45862 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0015, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-45862? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.