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NVD / CVE Program· CNA Linux

CVE-2026-45862: iommu/vt-d: Flush cache for PASID table before using it

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.13% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Linux Linux 0616137b70e6d9a547d4b60df8e1b64e36d83661, 22d169bdd2849fe6bd18c2643742e1c02be6451c, 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0616137b70e6d9a547d4b60df8e1b64e36d83661, 22d169bdd2849fe6bd18c2643742e1c02be6451c, 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
May 27, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 2th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-45862

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.4.237 and later · before 5.5
  • linux linux kernel5.10.175 and later · before 5.10.252
  • linux linux kernel5.15.103 and later · before 5.15.202
  • linux linux kernel6.1.16 and later · before 6.1.165
  • linux linux kernel6.2.3 and later · before 6.6.128
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.14
  • linux linux kernel6.19 and later · before 6.19.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 1b48c70feefc499b62670521efa002ab01e05df5, bc348a6cc8f92e9979fbfbb3c6b48fd51b4b1dbf, 6.3affected
    • 7e00b52c8cdd9d3a985d63d72ecae7bde6314883 and later · before cd75e77125c8a51754ca4cd60b4ca083ed735d1daffected · git
    • 5c65f097124770c3e5b9b83ed1a8b68c119bc7b5 and later · before 0616137b70e6d9a547d4b60df8e1b64e36d83661affected · git
    • 2bed9455db7cc0ab7ece6b3d846472097b52855a and later · before 36990407cdd257473607e33802d00e978af2759eaffected · git
    • 194b3348bdbb7db65375c72f3f774aee4cc6614e and later · before c93f23375d8c410954b0df825e814b632fd62b9daffected · git
    • 194b3348bdbb7db65375c72f3f774aee4cc6614e and later · before 5962c30a6f05ea1ab73f039e235bb30716243517affected · git
    • 194b3348bdbb7db65375c72f3f774aee4cc6614e and later · before 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16affected · git
    • 194b3348bdbb7db65375c72f3f774aee4cc6614e and later · before d15cda135148ea7ba929cfdbcf208182bc29a7aaaffected · git
    • 194b3348bdbb7db65375c72f3f774aee4cc6614e and later · before 22d169bdd2849fe6bd18c2643742e1c02be6451caffected · git
    • 5.10.175 and later · before 5.10.252affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.18.14-16.18.14-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-45860May 27, 2026 · netfilter: nf_conncount: increase the connection clean up limit to 64
    30Monitor
  • ← EarlierCVE-2026-45861May 27, 2026 · gfs2: Fix slab-use-after-free in qd_put
    31Monitor
  • Later →CVE-2026-45877May 27, 2026 · HID: intel-ish-hid: fix NULL-ptr-deref in ishtp_bus_remove_all_clients
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0616137b70e6d9a547d4b60df8e1b64e36d83661Vendor (CNA)
Linux Linux22d169bdd2849fe6bd18c2643742e1c02be6451cVendor (CNA)
Linux Linux36244dfd3853f7bf89d03b8e90d56b23ce7fbc16Vendor (CNA)
Linux Linux36990407cdd257473607e33802d00e978af2759eVendor (CNA)
Linux Linux5.10.252Vendor (CNA)
Linux Linux5.15.202Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux5962c30a6f05ea1ab73f039e235bb30716243517Vendor (CNA)
Linux Linux6.1.165Vendor (CNA)
Linux Linux6.3Vendor (CNA)
Linux Linuxc93f23375d8c410954b0df825e814b632fd62b9dVendor (CNA)
Linux Linuxcd75e77125c8a51754ca4cd60b4ca083ed735d1dVendor (CNA)
Linux Linuxd15cda135148ea7ba929cfdbcf208182bc29a7aaVendor (CNA)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records