iommu/vt-d: Flush cache for PASID table before using it
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.
- Published
- May 27, 2026
- Updated
- Aug 5, 2026
- EPSS
- 0.2% · 4th percentile
- CWE
- —
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_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.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.170-1 | 6.1.170-1 |
| Debian:13 | linux | before 6.12.85-1 | 6.12.85-1 |
| Debian:14 | linux | before 6.18.14-1 | 6.18.14-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- 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 KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 0616137b70e6d9a547d4b60df8e1b64e36d83661 | Vendor (CNA) |
| Linux Linux | 22d169bdd2849fe6bd18c2643742e1c02be6451c | Vendor (CNA) |
| Linux Linux | 36244dfd3853f7bf89d03b8e90d56b23ce7fbc16 | Vendor (CNA) |
| Linux Linux | 36990407cdd257473607e33802d00e978af2759e | Vendor (CNA) |
| Linux Linux | 5.10.252 | Vendor (CNA) |
| Linux Linux | 5.15.202 | Vendor (CNA) |
| Linux Linux | 5.5 | Vendor (CNA) |
| Linux Linux | 5962c30a6f05ea1ab73f039e235bb30716243517 | Vendor (CNA) |
| Linux Linux | 6.1.165 | Vendor (CNA) |
| Linux Linux | 6.3 | Vendor (CNA) |
| Linux Linux | c93f23375d8c410954b0df825e814b632fd62b9d | Vendor (CNA) |
| Linux Linux | cd75e77125c8a51754ca4cd60b4ca083ed735d1d | Vendor (CNA) |
| Linux Linux | d15cda135148ea7ba929cfdbcf208182bc29a7aa | Vendor (CNA) |
| debian:linux | 6.1.170-1 · Debian:12 | Package 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.
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 researchersFinders, 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.
- TR-26-0290 · Jun 2, 2026(Linux Kernel Güvenlik Bildirimi)
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)
—
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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/0616137b70e6d9a547d4b60df8e1b64e36d83661
- git.kernel.org/stable/c/22d169bdd2849fe6bd18c2643742e1c02be6451c
- git.kernel.org/stable/c/36244dfd3853f7bf89d03b8e90d56b23ce7fbc16
- git.kernel.org/stable/c/36990407cdd257473607e33802d00e978af2759e
- git.kernel.org/stable/c/5962c30a6f05ea1ab73f039e235bb30716243517
- git.kernel.org/stable/c/c93f23375d8c410954b0df825e814b632fd62b9d
- git.kernel.org/stable/c/cd75e77125c8a51754ca4cd60b4ca083ed735d1d
- git.kernel.org/stable/c/d15cda135148ea7ba929cfdbcf208182bc29a7aa
Vendor advisories and official records. Exploit/PoC links are deliberately left out.